By GokiSoft.com| 22:35 29/10/2021|

Java Advanced

[Video] - Hướng dẫn tạo dự án quản lý sinh viên + import + export XML File

Source Code

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lession2;

/**
 *
 * @author Diep.Tran
 */
public class Student {
    String rollNo, fullname, gender, address;

    public Student() {
    }

    public Student(String rollNo, String fullname, String gender, String address) {
        this.rollNo = rollNo;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollNo() {
        return rollNo;
    }

    public void setRollNo(String rollNo) {
        this.rollNo = rollNo;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    
    public String getXMLString() {
        return "<student>\n" +
"		<rollNo>"+rollNo+"</rollNo>\n" +
"		<fullname>"+fullname+"</fullname>\n" +
"		<address>"+address+"</address>\n" +
"		<gender>"+gender+"</gender>\n" +
"	</student>";
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lession2;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author Diep.Tran
 */
public class StudentHandler extends DefaultHandler{
    List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = true;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            studentList.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = false;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        
        if(isRollNo) {
            currentStudent.setRollNo(value);
        } else if(isFullname) {
            currentStudent.setFullname(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentList() {
        return studentList;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<studentList>
<student>
		<rollNo>R001</rollNo>
		<fullname>TRAN VAN A</fullname>
		<address>HA NOI</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R002</rollNo>
		<fullname>TRAN VAN B</fullname>
		<address>NAM DINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R003</rollNo>
		<fullname>TRAN VAN B</fullname>
		<address>NAM DINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R004</rollNo>
		<fullname>TRAN VAN C</fullname>
		<address>NAM DINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R005</rollNo>
		<fullname>TRAN VAN E</fullname>
		<address>NAM DINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R006</rollNo>
		<fullname>Tran Van T</fullname>
		<address>OKOK</address>
		<gender>Male</gender>
	</student>
</studentList>

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lession2;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author Diep.Tran
 */
public class StudentFrame extends javax.swing.JFrame {
    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();
    
    /**
     * Creates new form StudentFrame
     */
    public StudentFrame() {
        initComponents();
        
        tableModel = (DefaultTableModel) tblStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        txtFullName = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        txtAddress = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        cbGender = new javax.swing.JComboBox<>();
        btnSave = new javax.swing.JButton();
        btnExportXML = new javax.swing.JButton();
        btnImportXML = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Student Manager");

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input Student's Detail Information"));

        jLabel1.setText("Roll No:");

        jLabel2.setText("Full Name:");

        jLabel3.setText("Gender:");

        jLabel4.setText("Address:");

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "Female" }));

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnExportXML.setText("Export XML");
        btnExportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportXMLActionPerformed(evt);
            }
        });

        btnImportXML.setText("Import XML");
        btnImportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnImportXMLActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1)
                    .addComponent(jLabel4)
                    .addComponent(jLabel3)
                    .addComponent(jLabel2))
                .addGap(28, 28, 28)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, 253, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(btnSave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 253, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(0, 0, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(165, 165, 165)
                        .addComponent(btnExportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, 253, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(12, 12, 12)
                        .addComponent(btnImportXML, javax.swing.GroupLayout.DEFAULT_SIZE, 125, Short.MAX_VALUE)))
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(15, 15, 15)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSave))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnImportXML))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnExportXML))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(30, Short.MAX_VALUE))
        );

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Roll No", "Full Name", "Gender", "Address"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, true, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(tblStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jScrollPane1))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 146, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollNo = txtRollNo.getText();
        String fullname = txtFullName.getText();
        String gender = cbGender.getSelectedItem().toString();
        String address = txtAddress.getText();
        
        if(rollNo.isEmpty() || fullname.isEmpty()) {
            JOptionPane.showMessageDialog(rootPane, "RollNo is empty || fullname is empty?");
            return;
        }
        
        for (Student student : studentList) {
            if(student.getRollNo().equalsIgnoreCase(rollNo)) {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed!!!");
                return;
            }
        }
        
        Student std = new Student(rollNo, fullname, gender, address);
        studentList.add(std);
        
        tableModel.addRow(new Object[] {rollNo, fullname, gender, address});
    }                                       

    private void btnImportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        FileInputStream fis = null;
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler handler = new StudentHandler();
            
            parser.parse(fis, handler);
            
            studentList = handler.getStudentList();
            
            tableModel.setRowCount(0);
            
            for (Student student : studentList) {
                tableModel.addRow(new Object[] {
                    student.getRollNo(), student.getFullname(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Import success!!!");
    }                                            

    private void btnExportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }
        
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<studentList>\n" +
                                    body+
                    "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                            

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnExportXML;
    private javax.swing.JButton btnImportXML;
    private javax.swing.JButton btnSave;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullName;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}

Phản hồi từ học viên

5

(Dựa trên đánh giá ngày hôm nay)

Hoang Ngo

2020-04-24 07:08:47

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package bai2;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author PC
 */
public class StudentFrame extends javax.swing.JFrame {
    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();
    /**
     * Creates new form StudentFrame
     */
    public StudentFrame() {
        initComponents();
        tableModel = (DefaultTableModel) btlStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        txtFullName = new javax.swing.JTextField();
        txtAddress = new javax.swing.JTextField();
        btnSave = new javax.swing.JButton();
        btnInportXML = new javax.swing.JButton();
        btnExport = new javax.swing.JButton();
        cbGender = new javax.swing.JComboBox<>();
        jScrollPane2 = new javax.swing.JScrollPane();
        btlStudent = new javax.swing.JTable();

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            },
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
            }
        ));
        jScrollPane1.setViewportView(jTable1);

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input Student's Detail Information"));

        jLabel1.setText("Roll No :");

        jLabel2.setText("Full Name :");

        jLabel3.setText("Gender :");

        jLabel4.setText("Address :");

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnInportXML.setText("Import XML");
        btnInportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnInportXMLActionPerformed(evt);
            }
        });

        btnExport.setText("Export XML");
        btnExport.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportActionPerformed(evt);
            }
        });

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "female" }));
        cbGender.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbGenderActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1)
                    .addComponent(jLabel2)
                    .addComponent(jLabel4)
                    .addComponent(jLabel3))
                .addGap(58, 58, 58)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, 207, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(btnSave))
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, 207, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 23, Short.MAX_VALUE)
                                .addComponent(btnInportXML))
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 207, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(btnExport)))
                        .addGap(28, 28, 28))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGap(30, 30, 30)
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                    .addComponent(jLabel1)
                                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGap(37, 37, 37)
                                .addComponent(btnSave)))
                        .addGap(18, 18, 18)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel2)
                            .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(18, 18, 18))
                    .addComponent(btnInportXML, javax.swing.GroupLayout.Alignment.TRAILING))
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel3)
                        .addGap(29, 29, 29)
                        .addComponent(jLabel4))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(12, 12, 12)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(btnExport))))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        btlStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Roll No", "Full Name", "Gender", "Address"
            }
        ));
        jScrollPane2.setViewportView(btlStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jScrollPane2, javax.swing.GroupLayout.Alignment.TRAILING)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 117, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(0, 0, 0))
        );

        pack();
    }// </editor-fold>                        

    private void cbGenderActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
    }                                        

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String RollNo = txtRollNo.getText();
        String FullName = txtFullName.getText();
        String Gender =cbGender.getSelectedItem().toString();
        String Address = txtAddress.getText();
        
         if(RollNo.isEmpty() || FullName.isEmpty()) {
            JOptionPane.showMessageDialog(rootPane, "RollNo is empty || FullName is empty?");
            return;
        }
        
        for (Student student : studentList) {
            if(student.getRollNo().equalsIgnoreCase(RollNo)) {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed!!!");
                return;
            }
        }
        
        Student std = new Student(RollNo, FullName, Gender, Address);
        studentList.add(std);
        
        tableModel.addRow(new Object[] {RollNo, FullName, Gender, Address});
    }                                       

    private void btnExportActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
          StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }
        
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<studentList>\n"
                     +  body+
                    "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                         

    private void btnInportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
         FileInputStream fis = null;
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler handler = new StudentHandler();
            
            parser.parse(fis, handler);
            
            studentList = handler.getStudentList();
            
            tableModel.setRowCount(0);
            
            for (Student student : studentList) {
                tableModel.addRow(new Object[] {
                    student.getRollNo(), student.getFullname(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Import success!!!");
    }                                            

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JTable btlStudent;
    private javax.swing.JButton btnExport;
    private javax.swing.JButton btnInportXML;
    private javax.swing.JButton btnSave;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTable jTable1;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullName;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package bai2;

/**
 *
 * @author HOME
 */
public class Student {
    String rollNo,
string fullname,
String gender,
String address;

    public Student() {
    }

    public Student(String rollNo, String fullname, String gender, String address) {
        this.rollNo = rollNo;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollNo() {
        return rollNo;
    }

    public void setRollNo(String rollNo) {
        this.rollNo = rollNo;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    
      public String getXMLString() {
        return "<student>\n" +
"		<rollNo>"+rollNo+"</rollNo>\n" +
"		<fullname>"+fullname+"</fullname>\n" +
"		<gender>"+gender+"</gender>\n" +
"		<address>"+address+"</address>\n" +
"	</student>";
    }
    
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package bai2;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author PC
 */
public class StudentHandler extends DefaultHandler{
     List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;

    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = true;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            studentList.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = false;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        
        if(isRollNo) {
            currentStudent.setRollNo(value);
        } else if(isFullname) {
            currentStudent.setFullname(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentList() {
        return studentList;
    }
}

Phan Bạch Tùng Dương

2020-04-20 02:42:36

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package QLSinhVien;

/**
 *
 * @author Admin
 */
public class Student {
    String rollNo, fullname, gender, address;

    public Student() {
    }

    public Student(String rollNo, String fullname, String gender, String address) {
        this.rollNo = rollNo;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollNo() {
        return rollNo;
    }

    public void setRollNo(String rollNo) {
        this.rollNo = rollNo;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    
    public String getXMLString() {
        return "<student>\n" +
"		<rollNo>"+rollNo+"</rollNo>\n" +
"		<fullname>"+fullname+"</fullname>\n" +
"		<address>"+address+"</address>\n" +
"		<gender>"+gender+"</gender>\n" +
"	</student>";
    }

    void display() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package QLSinhVien;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author Admin
 */
public class StudentFrame extends javax.swing.JFrame {
    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();

    /**
     * Creates new form StudentFrame
     */
    public StudentFrame() {
        initComponents();
        
        tableModel = (DefaultTableModel) tblStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtrollNo = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        txtfullName = new javax.swing.JTextField();
        txtAddress = new javax.swing.JTextField();
        cbGender = new javax.swing.JComboBox<>();
        btnSave = new javax.swing.JButton();
        btnimportXML = new javax.swing.JButton();
        btnexportXML = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Student Manager");

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input Student's Information"));

        jLabel1.setText("Roll No:");

        txtrollNo.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                txtrollNoActionPerformed(evt);
            }
        });

        jLabel2.setText("Full name:");

        jLabel3.setText("Gender:");

        jLabel4.setText("Address:");

        txtfullName.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                txtfullNameActionPerformed(evt);
            }
        });

        txtAddress.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                txtAddressActionPerformed(evt);
            }
        });

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "Female", " " }));

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnimportXML.setText("Import XML");
        btnimportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnimportXMLActionPerformed(evt);
            }
        });

        btnexportXML.setText("Export XML");
        btnexportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnexportXMLActionPerformed(evt);
            }
        });

        btnDelete.setText("Delete");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 47, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 66, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 66, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 66, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(38, 38, 38)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(txtrollNo, javax.swing.GroupLayout.PREFERRED_SIZE, 400, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtfullName, javax.swing.GroupLayout.PREFERRED_SIZE, 400, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 400, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(55, 55, 55)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(btnDelete, javax.swing.GroupLayout.DEFAULT_SIZE, 93, Short.MAX_VALUE)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(btnimportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btnexportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btnSave, javax.swing.GroupLayout.DEFAULT_SIZE, 93, Short.MAX_VALUE)))
                .addContainerGap(24, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(45, 45, 45)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtrollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSave))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtfullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnimportXML))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnexportXML))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 33, Short.MAX_VALUE)
                .addComponent(btnDelete)
                .addContainerGap())
        );

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Roll No", "Full name", "Gender", "Address"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, true, true
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(tblStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 135, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void txtfullNameActionPerformed(java.awt.event.ActionEvent evt) {                                            
        // TODO add your handling code here:
    }                                           

    private void txtAddressActionPerformed(java.awt.event.ActionEvent evt) {                                           
        // TODO add your handling code here:
    }                                          

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollNo = txtrollNo.getText();
        String fullname = txtfullName.getText();
        String gender = cbGender.getSelectedItem().toString();
        String address = txtAddress.getText();
        
        if(rollNo.isEmpty() || fullname.isEmpty()) {
            JOptionPane.showMessageDialog(rootPane, "RollNo is empty || fullname is empty");
            return;
        }
        
        for (Student student : studentList) {
            if(student.getRollNo().equalsIgnoreCase(rollNo)) {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed!!!");
                return;
            }
        }
        
        Student std = new Student(rollNo, fullname, gender, address);
        studentList.add(std);
        
        tableModel.addRow(new Object [] {rollNo, fullname, gender, address});
    }                                       

    private void txtrollNoActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
    }                                         

    private void btnimportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        FileInputStream fis = null;
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler handler = new StudentHandler();
            
            parser.parse(fis, handler);
            
            studentList = handler.getStudentList();
            
            tableModel.setRowCount(0);
            
            for (Student student : studentList) {
                tableModel.addRow(new Object[] {
                    student.getRollNo(), student.getFullname(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Import success!!!");            
        
    }                                            

    private void btnexportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }
        
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                     "<studentList>\n" +
                                      body +
                     "\n</studentList>";
        
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(fos != null) {
                try { 
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Save compeleted!!!");
    }                                            

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnSave;
    private javax.swing.JButton btnexportXML;
    private javax.swing.JButton btnimportXML;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtfullName;
    private javax.swing.JTextField txtrollNo;
    // End of variables declaration                   
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package QLSinhVien;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author Admin
 */
public class StudentHandler extends DefaultHandler{

    static void delete(String xmlString) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = true;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            studentList.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = false;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        
        if(isRollNo) {
            currentStudent.setRollNo(value);
        } else if(isFullname) {
            currentStudent.setFullname(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentList() {
        return studentList;
    }
}

NguyenHuuThanh

2020-04-20 00:34:58

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package javaimportexportxml;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;

import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author abc
 */
public class StudentFrame extends javax.swing.JFrame {

    DefaultTableModel tableModel;
    List<Student> studentlist = new ArrayList<>();
    /**
     * Creates new form StudentFrame
     */
    public StudentFrame() {
        initComponents();
        
        tableModel = (DefaultTableModel) tblStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        txtFullName = new javax.swing.JTextField();
        txtAddress = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        txtGender = new javax.swing.JComboBox<>();
        btnSave = new javax.swing.JButton();
        btnImportXML = new javax.swing.JButton();
        btnExportXML = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input student's Detail Information"));

        jLabel1.setText("RollNo");

        txtRollNo.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                txtRollNoActionPerformed(evt);
            }
        });

        jLabel2.setText("Full Name");

        jLabel3.setText("Address");

        jLabel4.setText("Gender\n");

        txtGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male ", "Female" }));

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnImportXML.setText("btnImportXML");
        btnImportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnImportXMLActionPerformed(evt);
            }
        });

        btnExportXML.setText("btnExportXML");
        btnExportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportXMLActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(45, 45, 45)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel1)
                            .addComponent(jLabel2)
                            .addComponent(jLabel3)
                            .addComponent(jLabel4)))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(102, 102, 102)
                        .addComponent(btnSave)))
                .addGap(13, 13, 13)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(txtGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(txtRollNo)
                            .addComponent(txtFullName)
                            .addComponent(txtAddress, javax.swing.GroupLayout.DEFAULT_SIZE, 331, Short.MAX_VALUE))
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 55, Short.MAX_VALUE)
                        .addComponent(btnImportXML)
                        .addGap(47, 47, 47)
                        .addComponent(btnExportXML)
                        .addGap(84, 84, 84))))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(52, 52, 52)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(63, 63, 63)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(67, 67, 67)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(61, 61, 61)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jLabel4)
                    .addComponent(txtGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 26, Short.MAX_VALUE)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnExportXML)
                    .addComponent(btnImportXML)
                    .addComponent(btnSave))
                .addGap(38, 38, 38))
        );

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Roll No", "Full name", "Gender", "Address"
            }
        ));
        jScrollPane1.setViewportView(tblStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jScrollPane1)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(458, 458, 458))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(0, 0, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void txtRollNoActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
    }                                         

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollno = txtRollNo.getText();
        String fullname = txtFullName.getText();
        String address = txtAddress.getText();
        String gender = txtGender.getSelectedItem().toString();
        
        if(rollno.isEmpty() || fullname.isEmpty())
        {
            JOptionPane.showMessageDialog(rootPane, "Roll no // fullname is empty");
            return ;
            
        }
        for (Student student : studentlist)
        {
            if(student.getRollno().equalsIgnoreCase(rollno))
            {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed");
                
                return ;
            }
        }
        
        Student std = new Student(rollno , fullname , gender ,address);
        
        studentlist.add(std);
        
        tableModel.addRow(new Object[] {rollno , fullname ,gender ,address });
        
       
    }                                       

    private void btnImportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        
        // Import : 
        FileInputStream fis = null;
        
        try {
            fis = new FileInputStream("student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler handler = new StudentHandler();
            
            try {
                parser.parse(fis, handler);
            } catch (IOException ex) {
                Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
            
            studentlist = handler.getStudentlist();
            
            tableModel.setRowCount(0);
            for(Student student : studentlist)
            {
                tableModel.addRow(new Object[]{
                    student.getRollno() , student.getFullname() , student.getGender() , student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally 
        {
            if(fis != null)
            {
                try {
                    fis.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Import thanh cong");
        
    }                                            

    private void btnExportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        
       /* StringBuilder builder = new StringBuilder();
        for(Student student : studentlist)
        {
            builder.append(student.getXMLString());
        }
        
        String body = builder.toString();
        
        String xml = "<?xml version =\"1.0\" encoding =\"UTF-8\"?>\n" 
                + 
                "<studentlist>/n" 
                +
                body 
                +
                "</studentlist>";
        
        // Lưu vào file student.xml
        
        FileOutputStream fos = null;
        
        try{
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
            
        } catch(Exception e)
        {
            e.printStackTrace();
        }
        finally{
            if(fos != null)
            {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showConfirmDialog(rootPane, "Save success");
        
       
        */
        StringBuilder builder = new StringBuilder();
        for (Student student : studentlist) {
            builder.append(student.getXMLString());
        }
        
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<studentList>\n" +
                                    body+
                    "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
        
    }                                            

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnExportXML;
    private javax.swing.JButton btnImportXML;
    private javax.swing.JButton btnSave;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullName;
    private javax.swing.JComboBox<String> txtGender;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package javaimportexportxml;

/**
 *
 * @author abc
 */
public class Student {
    String rollno , fullname , gender , address ;
    
    
    public Student()
    {
        
    }

    public Student(String rollno, String fullname, String gender, String address) {
        this.rollno = rollno;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollno() {
        return rollno;
    }

    public void setRollno(String rollno) {
        this.rollno = rollno;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollno=" + rollno + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    
    public String getXMLString() {
        return "<student>\n" +
"		<rollNo>"+rollno+"</rollNo>\n" +
"		<fullname>"+fullname+"</fullname>\n" +
"		<address>"+address+"</address>\n" +
"		<gender>"+gender+"</gender>\n" +
"	</student>";
    }
    
    
}
package javaimportexportxml;


import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;




/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author abc
 */
public class StudentHandler extends DefaultHandler {
    
    
    List<Student> studentlist = new ArrayList<>();
    Student currentStudent = null;
    boolean isRollno = false , isFullname = false , isGender = false , isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
      if (qName.equalsIgnoreCase("student"))
      {
          currentStudent = new Student();
      }
      else if(qName.equalsIgnoreCase("rollno"))
      {
          isRollno = true;
      }
      else if(qName.equalsIgnoreCase("fullname"))
      {
          isFullname = true;
      }
      else if(qName.equalsIgnoreCase("gender"))
      {
          isGender = true;
      }
      else if(qName.equalsIgnoreCase("address"))
      {
          isAddress = true;
      }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
       if(qName.equalsIgnoreCase("student"))
       {
           studentlist.add(currentStudent);
           currentStudent = null;
       }
       else if(qName.equalsIgnoreCase("rollno"))
       {
           isRollno = false;
       }
       else if(qName.equalsIgnoreCase("fullname"))
       {
           isFullname = false;
       }
       else if(qName.equalsIgnoreCase("gender"))
       {
           isGender = false;
       }
       else if(qName.equalsIgnoreCase("address"))
       {
           isAddress = false;
       }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        if (isRollno)
        {
            currentStudent.setRollno(value);
        }
        else if(isFullname)
        {
            currentStudent.setFullname(value);
        }
        else if(isGender)
        {
            currentStudent.setGender(value);
        }
        else if(isAddress)
        {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentlist() {
        return studentlist;
    }

    
}

Trần Anh Quân

2020-04-19 14:30:57

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ls2;

/**
 *
 * @author Anh Quan
 */
public class Student {
    String rollNo, fullname, gender, address;

    public Student() {
    }

    public Student(String rollNo, String fullname, String gender, String address) {
        this.rollNo = rollNo;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollNo() {
        return rollNo;
    }

    public void setRollNo(String rollNo) {
        this.rollNo = rollNo;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    
    public String getXMLString() {
        return "<student>\n" +
"		<rollNo>"+rollNo+"</rollNo>\n" +
"		<fullname>"+fullname+"</fullname>\n" +
"		<address>"+address+"</address>\n" +
"		<gender>"+gender+"</gender>\n" +
"	</student>";
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ls2;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author Anh Quan
 */
public class StudentHandler extends DefaultHandler{
    List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = true;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            studentList.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = false;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        
        if(isRollNo) {
            currentStudent.setRollNo(value);
        } else if(isFullname) {
            currentStudent.setFullname(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentList() {
        return studentList;
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package ls2;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author Anh Quan
 */
public class StudentFrame extends javax.swing.JFrame {
    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();
    
    /**
     * Creates new form StudentFrame
     */
    public StudentFrame() {
        initComponents();
        
        tableModel = (DefaultTableModel) tblStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        txtFullName = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        txtAddress = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        cbGender = new javax.swing.JComboBox<>();
        btnSave = new javax.swing.JButton();
        btnExportXML = new javax.swing.JButton();
        btnImportXML = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Student Manager");

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input Student's Detail Information"));

        jLabel1.setText("Roll No:");

        jLabel2.setText("Full Name:");

        jLabel3.setText("Gender:");

        jLabel4.setText("Address:");

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "Female" }));

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnExportXML.setText("Export XML");
        btnExportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportXMLActionPerformed(evt);
            }
        });

        btnImportXML.setText("Import XML");
        btnImportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnImportXMLActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1)
                    .addComponent(jLabel4)
                    .addComponent(jLabel3)
                    .addComponent(jLabel2))
                .addGap(28, 28, 28)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, 253, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(btnSave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 253, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(0, 0, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(165, 165, 165)
                        .addComponent(btnExportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, 253, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(12, 12, 12)
                        .addComponent(btnImportXML, javax.swing.GroupLayout.DEFAULT_SIZE, 125, Short.MAX_VALUE)))
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(15, 15, 15)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSave))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnImportXML))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnExportXML))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(30, Short.MAX_VALUE))
        );

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Roll No", "Full Name", "Gender", "Address"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, true, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(tblStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jScrollPane1))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 146, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollNo = txtRollNo.getText();
        String fullname = txtFullName.getText();
        String gender = cbGender.getSelectedItem().toString();
        String address = txtAddress.getText();
        
        if(rollNo.isEmpty() || fullname.isEmpty()) {
            JOptionPane.showMessageDialog(rootPane, "RollNo is empty || fullname is empty?");
            return;
        }
        
        for (Student student : studentList) {
            if(student.getRollNo().equalsIgnoreCase(rollNo)) {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed!!!");
                return;
            }
        }
        
        Student std = new Student(rollNo, fullname, gender, address);
        studentList.add(std);
        
        tableModel.addRow(new Object[] {rollNo, fullname, gender, address});
    }                                       

    private void btnImportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        FileInputStream fis = null;
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler handler = new StudentHandler();
            
            parser.parse(fis, handler);
            
            studentList = handler.getStudentList();
            
            tableModel.setRowCount(0);
            
            for (Student student : studentList) {
                tableModel.addRow(new Object[] {
                    student.getRollNo(), student.getFullname(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Import success!!!");
    }                                            

    private void btnExportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }
        
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<studentList>\n" +
                                    body+
                    "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                            

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnExportXML;
    private javax.swing.JButton btnImportXML;
    private javax.swing.JButton btnSave;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullName;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}

<?xml version="1.0" encoding="UTF-8"?>
<studentList>
<student>
		<rollNo>R001</rollNo>
		<fullname>TRAN ANH A</fullname>
		<address>HA TINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R002</rollNo>
		<fullname>TRAN ANH B</fullname>
		<address>HA TINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R003</rollNo>
		<<fullname>TRAN ANH C</fullname>
		<address>HA TINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R004</rollNo>
		<fullname>TRAN ANH D</fullname>
		<address>HA TINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R005</rollNo>
		<fullname>TRAN ANH E</fullname>
		<address>HA TINH</address>
		<gender>Male</gender>
	</student><student>
		<rollNo>R006</rollNo>
		<fullname>TRAN ANH F</fullname>
		<address>HA TINH</address>
		<gender>Male</gender>
	</student>
</studentList>

hoangduyminh

2020-04-19 02:46:30

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lession1;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author Minh
 */
public class StudentJFrame extends javax.swing.JFrame {
    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();

    /**
     * Creates new form StudentJFrame
     */
    public StudentJFrame() {
        initComponents();
        
        tableModel = (DefaultTableModel) tblStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        txtFullname = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        cbGender = new javax.swing.JComboBox<>();
        jLabel4 = new javax.swing.JLabel();
        txtAddress = new javax.swing.JTextField();
        btnSave = new javax.swing.JButton();
        btnImportXML = new javax.swing.JButton();
        btnExportXML = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        btnRepair = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Imort Student's Detail Infornation"));

        jLabel1.setText("Roll No:");

        jLabel2.setText("Full Name");

        jLabel3.setText("Gender");

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "FeMale", " " }));

        jLabel4.setText("Address");

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnImportXML.setText("ImportXML");
        btnImportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnImportXMLActionPerformed(evt);
            }
        });

        btnExportXML.setText("ExportXML");
        btnExportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportXMLActionPerformed(evt);
            }
        });

        btnDelete.setText("Delete");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        btnRepair.setText("Repair");
        btnRepair.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnRepairActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(47, 47, 47)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel2)
                            .addComponent(jLabel3)
                            .addComponent(jLabel1)
                            .addComponent(jLabel4))
                        .addGap(36, 36, 36)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(txtRollNo)
                            .addComponent(txtFullname)
                            .addComponent(txtAddress, javax.swing.GroupLayout.DEFAULT_SIZE, 253, Short.MAX_VALUE)))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(88, 88, 88)
                        .addComponent(btnSave)
                        .addGap(43, 43, 43)
                        .addComponent(btnImportXML)
                        .addGap(52, 52, 52)
                        .addComponent(btnExportXML)
                        .addGap(42, 42, 42)
                        .addComponent(btnDelete)
                        .addGap(36, 36, 36)
                        .addComponent(btnRepair)))
                .addContainerGap(132, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(24, 24, 24)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(29, 29, 29)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(txtFullname, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(39, 39, 39)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(39, 39, 39)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel4)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(57, 57, 57)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnSave)
                    .addComponent(btnImportXML)
                    .addComponent(btnExportXML)
                    .addComponent(btnDelete)
                    .addComponent(btnRepair))
                .addContainerGap(72, Short.MAX_VALUE))
        );

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "RollNo", "Full Name", "Gender", "Address"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                true, false, false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(tblStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 904, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String Rollno = txtRollNo.getText();
        String Fullname = txtFullname.getText();
        String Gender = cbGender.getSelectedItem().toString();
        String Address = txtAddress.getText();
        
        if(Rollno.isEmpty() || Fullname.isEmpty()){
             JOptionPane.showMessageDialog(rootPane, "Roll no is empty || fullname is empty?");
             return;
        }
        for (Student student : studentList) {
            if(student.getRollno().equalsIgnoreCase(Rollno)){
                JOptionPane.showMessageDialog(rootPane, "RollNo existeds");
                return;
            }
        }
        Student std = new Student(Rollno, Fullname, Gender, Address);
        studentList.add(std);
        
        tableModel.addRow(new Object[] {Rollno,Fullname,Gender,Address});
    }                                       

    private void btnImportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        FileInputStream fis = null;
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("Student.xml");
            SAXParserFactory factory  = SAXParserFactory.newInstance();
            
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler handler = new StudentHandler();
            
            parser.parse(fis, handler);
            
            studentList = handler.getStudentList();
            
            tableModel.setRowCount(0);
            for (Student student : studentList) {
                tableModel.addRow(new Object[]{
                     student.getRollno(), student.getFullname(),
                     student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        JOptionPane.showMessageDialog(rootPane, "Import succect !!!");
    }                                            

    private void btnExportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
           "<studentList>\n" +
                body+
           "\n</studentList>";
        
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
           if(fos != null){
               try {
                   fos.close();
               } catch (IOException ex) {
                   Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
               }
           }
        }
        JOptionPane.showMessageDialog(rootPane, "Save okie");
    }                                            

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
         int selectedIndex = tblStudent.getSelectedRow();
         
         studentList.get(selectedIndex).display();
         if(selectedIndex >=0){
             Student std = studentList.get(selectedIndex);
             
             int option = JOptionPane.showConfirmDialog(this, "Do you want to Delete item!");
             System.out.println("option" +option);
             
             if(option ==0){
                studentList.remove(selectedIndex);
                
                tableModel.setRowCount(0);
                
                 for (Student student : studentList) {
                     tableModel.addRow(new Object[]{
                          std.getRollno(),std.getFullname()
                         ,std.getGender(),std.getAddress()
                     });
                 }
             }
         }
    }                                         

    private void btnRepairActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        txtRollNo.setText("");
        txtAddress.setText("");
        txtFullname.setText("");
        cbGender.setSelectedIndex(0);
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentJFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnExportXML;
    private javax.swing.JButton btnImportXML;
    private javax.swing.JButton btnRepair;
    private javax.swing.JButton btnSave;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullname;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lession1;

/**
 *
 * @author Minh
 */
public class Student {
    String Rollno,fullname,gender,address;

    public Student() {
    }

    public Student(String Rollno, String fullname, String gender, String address) {
        this.Rollno = Rollno;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollno() {
        return Rollno;
    }

    public void setRollno(String Rollno) {
        this.Rollno = Rollno;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "Rollno=" + Rollno + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    
    public String getXMLString() {
          return"<student>\n" +
"		<rollNo>"+Rollno+"</rollNo>\n" +
"		<fullname>"+fullname+"</fullname>\n" +
"		<address>"+address+"</address>\n" +
"		<gender>"+gender+"</gender>\n" +
"	 </student>";
    }

    public void display(){
        System.out.println(toString());
     
    }
    
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lession1;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author Minh
 */
public class StudentHandler extends DefaultHandler{

    static void delete(String rollno) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    List<Student> studentList = new ArrayList<>();
    Student currentStudent;
    
    boolean isRollNo = false, isFullname = false , isGender = false, isAddress = false;
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")){
            currentStudent = new Student();
        }else if (qName.equalsIgnoreCase("rollNo")){
             isRollNo = true;
        }else if (qName.equalsIgnoreCase("fullname")){
             isFullname = true;
        }else if (qName.equalsIgnoreCase("gender")){
             isGender = true;
        }else if (qName.equalsIgnoreCase("address")){
             isAddress = true;
        }
            
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
            if(qName.equalsIgnoreCase("student")){
                studentList.add(currentStudent);
            currentStudent = null;
        }else if (qName.equalsIgnoreCase("rollNo")){
             isRollNo = false;
        }else if (qName.equalsIgnoreCase("fullname")){
             isFullname = false;
        }else if (qName.equalsIgnoreCase("gender")){
             isGender = false;
        }else if (qName.equalsIgnoreCase("address")){
             isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
              String value = new String(ch, start, length);
           if(isRollNo){
              currentStudent.setRollno(value);
           }else if(isFullname){
              currentStudent.setFullname(value);
           }else if(isGender){
              currentStudent.setGender(value);
           }else if(isAddress){
             currentStudent.setAddress(value);
           }
              
    }

    public List<Student> getStudentList() {
        return studentList;
    }
    
}

nguyễn văn huy

2020-04-18 08:18:24

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Swing3;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import  java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
 *
 * @author ASUS
 */
public class Modify {
    public static List<Student> Finn() throws SQLException{
        List<Student> thaolist=new ArrayList<>();
        Connection conn=null;
        Statement  sta=null;
        try {
            conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/thaou?serverTimezone=UTC", "root", "");
            String sql="select*from student";
            sta=conn.createStatement();
            ResultSet resu=sta.executeQuery(sql);
            while (resu.next()) {                
                Student thao=new Student(resu.getString("rollno"),
                        resu.getString("name"),
                        resu.getString("gender"),
                        resu.getString("address"));
                thaolist.add(thao);
            }
        } catch (SQLException ex) {
            Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
        }finally{
            if(conn!=null){
                conn.close();;
            }if(sta!=null){
                sta.close();
            }
        }return thaolist;
    }
   public static void insert(Student thao) {
        Connection connection = null;
        PreparedStatement statement = null;

        try {
            //lay tat ca danh sach sinh vien
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/thaou?serverTimezone=UTC", "root", "");

            //query
            String sql = "insert into student(rollno,name,gender,address) values(?, ?, ?, ?)";
            statement = connection.prepareCall(sql);

            statement.setString(1, thao.getRollno());
            statement.setString(2, thao.getName());
            
            statement.setString(3, thao.getGender());
            statement.setString(4, thao.getAddress());

            statement.execute();
        } catch (SQLException ex) {
            Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if (statement != null) {
                try {
                    statement.close();
                } catch (SQLException ex) {
                    Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }

            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException ex) {
                    Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        //ket thuc.
    }
     public static void delete(String name) {
        Connection connection = null;
        PreparedStatement statement = null;

        try {
            //lay tat ca danh sach sinh vien
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/thaou?serverTimezone=UTC", "root", "");

            //query
            String sql = "delete from student where name = ?";
            statement = connection.prepareCall(sql);

            statement.setString(1, name);

            statement.execute();
        } catch (SQLException ex) {
            Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if (statement != null) {
                try {
                    statement.close();
                } catch (SQLException ex) {
                    Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }

            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException ex) {
                    Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        //ket thuc.
    }
     public static List<Student> findByFullname(String name) {
        List<Student> thaolist = new ArrayList<>();

        Connection connection = null;
        PreparedStatement statement = null;

        try {
            //lay tat ca danh sach sinh vien
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/thaou?serverTimezone=UTC", "root", "");

            //query
            String sql = "select * from student where name like ?";
            statement = connection.prepareCall(sql);
            statement.setString(1, "%" + name + "%");

            ResultSet resu = statement.executeQuery();

            while (resu.next()) {
                
                        Student thao=new Student(resu.getString("rollno"),
                        resu.getString("name"),
                        resu.getString("gender"),
                        resu.getString("address"));
                thaolist.add(thao);
                        
               
            }
        } catch (SQLException ex) {
            Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if (statement != null) {
                try {
                    statement.close();
                } catch (SQLException ex) {
                    Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }

            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException ex) {
                    Logger.getLogger(Modify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        //ket thuc.

        return thaolist;
    }


    static List<Student> Finn(String input) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}
>>>>>>>
???????
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Swing3;

/**
 *
 * @author ASUS
 */
public class Student {
    String rollno,name,gender,address;

    public Student() {
    }

    public Student(String rollno, String name, String gender, String address) {
        this.rollno = rollno;
        this.name = name;
        this.gender = gender;
        this.address = address;
    }

    public String getRollno() {
        return rollno;
    }

    public void setRollno(String rollno) {
        this.rollno = rollno;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollno=" + rollno + ", name=" + name + ", gender=" + gender + ", address=" + address + '}';
    }
    public String getXML() {
        return "<student>\n" +
"		<rollno>"+rollno+"</rollno>\n" +
"		<name>"+name+"</name>\n" +
"		<gender>"+gender+"</gender>\n" +
"               <address>"+address+"</address>\n" +
"	</student>";
    }
}
>>>>>>>
???????
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Swing3;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author ASUS
 */
public class StudentJFrame extends javax.swing.JFrame {

    DefaultTableModel model;
    List<Student> thaolist = new ArrayList<>();

    /**
     * Creates new form StudentJFrame
     */
    public StudentJFrame() {
        initComponents();
        model = (DefaultTableModel) TableStudent.getModel();
        ShowStudent();
    }

    private void ShowStudent() {
        try {
            thaolist = Modify.Finn();
        } catch (SQLException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
        model.setRowCount(0);
        thaolist.forEach((thao) -> {
            model.addRow(new Object[]{model.getRowCount() + 1,
                thao.getRollno(),
                thao.getName(),
                thao.getGender(),
                thao.getAddress()});
        });
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jTextField1 = new javax.swing.JTextField();
        Id = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jTextField2 = new javax.swing.JTextField();
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        txtRollno = new javax.swing.JTextField();
        txtName = new javax.swing.JTextField();
        txtGender = new javax.swing.JTextField();
        txtAddress = new javax.swing.JTextField();
        btnSave = new javax.swing.JButton();
        btnReset = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        btnFind = new javax.swing.JButton();
        btnExport = new javax.swing.JButton();
        btnImport = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        TableStudent = new javax.swing.JTable();

        Id.setText("ID");

        jLabel5.setText("id");

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input Student"));

        jLabel1.setText("Rollno:");

        jLabel2.setText("Name:");

        jLabel3.setText("Gender:");

        jLabel4.setText("Address:");

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnReset.setText("Reset");
        btnReset.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnResetActionPerformed(evt);
            }
        });

        btnDelete.setText("Delete");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        btnFind.setText("Find");
        btnFind.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnFindActionPerformed(evt);
            }
        });

        btnExport.setText("Export");
        btnExport.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportActionPerformed(evt);
            }
        });

        btnImport.setText("Import");
        btnImport.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnImportActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel3)
                    .addComponent(jLabel4)
                    .addComponent(jLabel2)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 68, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(159, 159, 159)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addComponent(txtAddress, javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(txtGender, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 419, Short.MAX_VALUE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btnImport))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(txtName, javax.swing.GroupLayout.PREFERRED_SIZE, 419, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addComponent(btnSave, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(32, 32, 32)
                                .addComponent(btnReset, javax.swing.GroupLayout.PREFERRED_SIZE, 96, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(18, 18, 18)
                                .addComponent(btnDelete, javax.swing.GroupLayout.PREFERRED_SIZE, 98, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(44, 44, 44)
                                .addComponent(btnFind, javax.swing.GroupLayout.PREFERRED_SIZE, 91, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGap(0, 0, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(txtRollno, javax.swing.GroupLayout.PREFERRED_SIZE, 419, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 39, Short.MAX_VALUE)
                        .addComponent(btnExport))))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(56, 56, 56)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 51, Short.MAX_VALUE)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel2)
                            .addComponent(txtName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                                .addGap(31, 31, 31)
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                    .addComponent(btnImport)
                                    .addComponent(jLabel3)
                                    .addComponent(txtGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addGap(96, 96, 96))
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGap(100, 100, 100)
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(jLabel4))))
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                .addComponent(btnSave)
                                .addComponent(btnReset))
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGap(1, 1, 1)
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                    .addComponent(btnDelete)
                                    .addComponent(btnFind))))
                        .addGap(18, 18, 18))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(txtRollno, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(btnExport))
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
        );

        TableStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Id", "rollno", "name", "gender", "address"
            }
        ));
        jScrollPane1.setViewportView(TableStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 821, Short.MAX_VALUE)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(41, 41, 41)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(0, 0, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollno = txtRollno.getText();
        String name = txtName.getText();
        String gender = txtGender.getText();
        String address = txtAddress.getText();
        Student thao = new Student(rollno, name, gender, address);
        Modify.insert(thao);
        ShowStudent();
    }                                       

    private void btnResetActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        txtRollno.setText("");
        txtName.setText("");
        txtGender.setText("");
        txtAddress.setText("");
    }                                        

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        int check = TableStudent.getSelectedRow();
        if (check >= 0) {
            Student thao = thaolist.get(check);
            int opp = JOptionPane.showConfirmDialog(this, "bn muon xoa>>>");
            System.out.println("opp:" + opp);
            if (opp == 0) {
                Modify.delete(thao.name);
                ShowStudent();
            }
        }
    }                                         

    private void btnFindActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:

        String input = JOptionPane.showInputDialog(this, "Enter full name to search");
        if (input != null && input.length() > 0) {
            thaolist = Modify.findByFullname(input);

            model.setRowCount(0);

            thaolist.forEach((student) -> {
                model.addRow(new Object[]{model.getRowCount() + 1, student.getRollno(),
                    student.getName(), student.getGender(), student.getAddress()});
            });
        } else {
            ShowStudent();
        }

    }                                       

    private void btnExportActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
         StringBuilder builder = new StringBuilder();
        for (Student thao : thaolist) {
            builder.append(thao.getXML());
        }
        
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<studentList>\n" +
                                    body+
                    "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("C:\\Users\\ASUS\\Documents\\NetBeansProjects\\Tha.....0\\src\\Swing3\\student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                         

    private void btnImportActionPerformed(java.awt.event.ActionEvent evt) {                                          
        FileInputStream fis = null;
        try {
            // TODO add your handling code here:

            fis = new FileInputStream("C:\\Users\\ASUS\\Documents\\NetBeansProjects\\Tha.....0\\src\\Swing3\\student.xml");
            SAXParserFactory fac=SAXParserFactory.newInstance();
            SAXParser sax=fac.newSAXParser();
            parper pa=new parper();
            sax.parse(fis, pa);
            thaolist=pa.getThaolist();
            model.setRowCount(0);
            for (Student thao : thaolist) {
                model.addRow(new Object[]{
                    thao.getRollno(),
                    thao.getName(),
                    thao.getGender(),
                    thao.getAddress()
                });
            }
            
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        }finally{
            
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
            
        }
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentJFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JLabel Id;
    private javax.swing.JTable TableStudent;
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnExport;
    private javax.swing.JButton btnFind;
    private javax.swing.JButton btnImport;
    private javax.swing.JButton btnReset;
    private javax.swing.JButton btnSave;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtGender;
    private javax.swing.JTextField txtName;
    private javax.swing.JTextField txtRollno;
    // End of variables declaration                   
}
>>>>>>>
???????
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Swing3;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author ASUS
 */
public class parper extends DefaultHandler {
    List<Student> thaolist = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollno = false,
            isName = false, 
            isGender = false, 
            isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollno")) {
            isRollno = true;
        } else if(qName.equalsIgnoreCase("name")) {
            isName = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            thaolist.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollno")) {
            isRollno = false;
        } else if(qName.equalsIgnoreCase("name")) {
            isName = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        
        if(isRollno) {
            currentStudent.setRollno(value);
        } else if(isName) {
            currentStudent.setName(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getThaolist() {
        return thaolist;
    }

   
}
>>>>>
?????
<?xml version="1.0" encoding="UTF-8"?>
<studentList>
<student>
		<rollno>null</rollno>
		<name>null</name>
		<gender>null</gender>
               <address>null</address>
	</student><student>
		<rollno>R001</rollno>
		<name>tran thi mai thao</name>
		<gender>nu</gender>
               <address>thai hoa</address>
	</student><student>
		<rollno>R002</rollno>
		<name>nguyen van huy</name>
		<gender>nam</gender>
               <address>thai nguyen</address>
	</student><student>
		<rollno>R003</rollno>
		<name>hdgh</name>
		<gender>df</gender>
               <address>fd</address>
	</student>
</studentList>

Phí Văn Long

2020-04-18 03:33:06

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson2;

/**
 *
 * @author Nong
 */
public class Student {
    String rollNo,fullname,gender,address;

    public Student() {
    }

    public Student(String rollNo, String fullname, String gender, String address) {
        this.rollNo = rollNo;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollNo() {
        return rollNo;
    }

    public void setRollNo(String rollNo) {
        this.rollNo = rollNo;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    public void display(){
        // hàm hiển thị thông tin
        System.out.println(toString());
    }
    public String getXMLString() {
        return "<student>\n" +
		"<rollNo>"+rollNo+"</rollNo>\n" +
		"<fullname>"+fullname+"</fullname>\n" +
		"<address>"+address+"</address>\n" +
		"<gender>"+gender+"</gender>\n" +
	"</student>";
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson2;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author Nong
 */
public class StudentHandler extends DefaultHandler {
    List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = true;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            studentList.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = false;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        
        if(isRollNo) {
            currentStudent.setRollNo(value);
        } else if(isFullname) {
            currentStudent.setFullname(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentList() {
        return studentList;
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lesson2;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author Nong
 */
public class StudentFrame extends javax.swing.JFrame {

    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();

    /**
     * Creates new form StudentFrame
     */
    public StudentFrame() {
        initComponents();

        tableModel = (DefaultTableModel) tblStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        txtFullName = new javax.swing.JTextField();
        txtAddress = new javax.swing.JTextField();
        cbGender = new javax.swing.JComboBox<>();
        btnSave = new javax.swing.JButton();
        btnImportXML = new javax.swing.JButton();
        btnExportXML = new javax.swing.JButton();
        btnReset = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        btnFind = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input Student's Detail Information"));

        jLabel1.setText("Roll No :");

        jLabel2.setText("Full Name :");

        jLabel3.setText("Address :");

        jLabel4.setText("Gender :");

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "Female" }));
        cbGender.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbGenderActionPerformed(evt);
            }
        });

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnImportXML.setText("Import XML");
        btnImportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnImportXMLActionPerformed(evt);
            }
        });

        btnExportXML.setText("Export XML");
        btnExportXML.setToolTipText("");
        btnExportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportXMLActionPerformed(evt);
            }
        });

        btnReset.setText("Reset");
        btnReset.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnResetActionPerformed(evt);
            }
        });

        btnDelete.setText("Delete");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        btnFind.setText("Find");
        btnFind.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnFindActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(46, 46, 46)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 75, Short.MAX_VALUE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(31, 31, 31)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, 435, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, 435, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 435, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(91, 91, 91)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(btnExportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(btnImportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(btnSave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(btnReset, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(80, 80, 80)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(btnDelete, javax.swing.GroupLayout.DEFAULT_SIZE, 87, Short.MAX_VALUE)
                    .addComponent(btnFind, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(61, 61, 61))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(22, 22, 22)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSave)
                    .addComponent(btnDelete))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnImportXML)
                    .addComponent(btnFind))
                .addGap(27, 27, 27)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addComponent(btnExportXML, javax.swing.GroupLayout.Alignment.TRAILING))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnReset))
                .addContainerGap(50, Short.MAX_VALUE))
        );

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Roll No", "Full Name", "Gender", "Address"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(tblStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane1)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void cbGenderActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
    }                                        

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollNo = txtRollNo.getText(); //chỉ khác nhau cảnh thể hiện thôi
        String fullname = txtFullName.getText();
        String gender = cbGender.getSelectedItem().toString();
        String address = txtAddress.getText();

        if (rollNo.isEmpty() || fullname.isEmpty()) {
            JOptionPane.showMessageDialog(rootPane, "RollNo is empty || fullname is empty?");
            return;
        }

        for (Student student : studentList) {
            if (student.getRollNo().equalsIgnoreCase(rollNo)) {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed!!!");
                return;
            }
        }

        Student std = new Student(rollNo, fullname, gender, address);
        studentList.add(std);

        tableModel.addRow(new Object[]{rollNo, fullname, gender, address});


    }                                       

    private void btnImportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        FileInputStream fis = null;
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("student1.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();

            StudentHandler handler = new StudentHandler();

            parser.parse(fis, handler);

            studentList = handler.getStudentList();

            tableModel.setRowCount(0);

            for (Student student : studentList) { // chỗ này nè
                tableModel.addRow(new Object[]{
                    student.getRollNo(), student.getFullname(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }

        JOptionPane.showMessageDialog(rootPane, "Import success!!!");
    }                                            

    private void btnExportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }

        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
                + "<studentList>\n"
                + body
                + "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;

        try {
            fos = new FileOutputStream("student1.xml");

            byte[] data = xml.getBytes();

            fos.write(data);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }

        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                            

    private void btnResetActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        txtRollNo.setText("");
        txtFullName.setText("");
        cbGender.setSelectedIndex(0);
        txtAddress.setText("");

    }                                        

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        //chỗ này e lấy ra dc vị trí thằng stdent nè
        int selectedIndex = tblStudent.getSelectedRow();
        System.out.println("Thử in ra xem đúng ko");
        // trả về phần tử theo vị trí trong list
        studentList.get(selectedIndex).display();
        
        if (selectedIndex >= 0) {
            Student std = studentList.get(selectedIndex);

            //show ra log de lua chon
            int option = JOptionPane.showConfirmDialog(this, "Do you want to delete this item?");
            System.out.println("option" + option);

            if (option == 0) {
                
                studentList.remove(selectedIndex);
                //xoa xong ghi dữ liệu lại vào bảng qua studentList
                //lệnh này cho bảng về như ban đầu thay đổi dữ liệu
                tableModel.setRowCount(0);
                //chay vòng fore điền dữ liệu
                for (Student st : studentList) {
                    tableModel.addRow(new Object[]{st.getRollNo(),st.getFullname(),st.getGender(),st.getAddress()}); // dòng này hiểu chưa
                    
                }
                
                
            }
        }
    }                                         

    private void btnFindActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String input = JOptionPane.showInputDialog(this,"Enter full name to search"); 
        
         if (input.length() > 0 && input != null  ) {  
            
            
            for (Student st : studentList) {
                    tableModel.addRow(new Object[]{st.getRollNo(),st.getFullname(),st.getGender(),st.getAddress()}); 
            }
        }else{
           
        }
    }                                       

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnExportXML;
    private javax.swing.JButton btnFind;
    private javax.swing.JButton btnImportXML;
    private javax.swing.JButton btnReset;
    private javax.swing.JButton btnSave;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullName;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}

Minh Nghia

2020-04-18 02:42:38

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Student_Inport_Export;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author Administrator
 */
public class StudentHandler extends DefaultHandler{
    List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")){
            currentStudent = new Student();
        }else if(qName.equalsIgnoreCase("rollNo")){
            isRollNo = true;
        }else if(qName.equalsIgnoreCase("fullName")){
            isFullname = true;
        }else if(qName.equalsIgnoreCase("gender")){
            isGender = true;
        }else if(qName.equalsIgnoreCase("address")){
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")){
            studentList.add(currentStudent);
            currentStudent = null;
        }else if(qName.equalsIgnoreCase("rollNo")){
            isRollNo = false;
        }else if(qName.equalsIgnoreCase("fullName")){
            isFullname = false;
        }else if(qName.equalsIgnoreCase("gender")){
            isGender = false;
        }else if(qName.equalsIgnoreCase("address")){
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
         
        if(isRollNo){
            currentStudent.setRollNo(value);
        } else if(isFullname){
            currentStudent.setFullName(value);
        }else if(isGender){
            currentStudent.setGender(value);
        }else if(isAddress){
            currentStudent.setGender(value);
        }
    }
    public List<Student> getStudentList(){
        return studentList;
    }
    
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Student_Inport_Export;



/**
 *
 * @author Administrator
 */
public class Student {
    String rollNo,fullName, gender, address;

    public Student() {
    }

    public Student(String rollNo, String fullName, String gender, String address) {
        this.rollNo = rollNo;
        this.fullName = fullName;
        this.gender = gender;
        this.address = address;
    }

    public String getRollNo() {
        return rollNo;
    }

    public void setRollNo(String rollNo) {
        this.rollNo = rollNo;
    }

    public String getFullName() {
        return fullName;
    }

    public void setFullName(String fullName) {
        this.fullName = fullName;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullName=" + fullName + ", gender=" + gender + ", address=" + address + '}';
    }
    
    public String getXMLString() {
        return "<student>\n"
                + "		<rollNo>" + rollNo + "</rollNo>\n"
                + "		<fullname>" + fullName + "</fullname>\n"
                + "		<gender>" + gender + "</gender>\n"
                + "		<address>" + address + "</address>\n"
                + "	</student>";
    }

    
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Student_Inport_Export;

import java.awt.Component;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author Administrator
 */
public class StudentFrame extends javax.swing.JFrame {
    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();
    /**
     * Creates new form StudentFrame
     */
    public StudentFrame() {
        initComponents();
        tableModel = (DefaultTableModel) tblStudent.getModel();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtRollno = new javax.swing.JTextField();
        txtFullname = new javax.swing.JTextField();
        txtAddress = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        cbGender = new javax.swing.JComboBox<>();
        btnSave = new javax.swing.JButton();
        tbnInportXML = new javax.swing.JButton();
        tblExportXML = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();
        btnEdit = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Input Student's"));

        jLabel1.setText("RollNo :");

        jLabel2.setText("FullName :");

        jLabel3.setText("Gender");

        jLabel4.setText("Address :");

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "Famale" }));

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        tbnInportXML.setText("InportXML");
        tbnInportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tbnInportXMLActionPerformed(evt);
            }
        });

        tblExportXML.setText("ExportXML");
        tblExportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                tblExportXMLActionPerformed(evt);
            }
        });

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "RollNo", "FullName", "Gender", "Address"
            }
        ));
        tblStudent.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                tblStudentMouseClicked(evt);
            }
        });
        jScrollPane1.setViewportView(tblStudent);

        btnEdit.setText("Edit");
        btnEdit.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnEditActionPerformed(evt);
            }
        });

        btnDelete.setText("Delete");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(40, 40, 40)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addComponent(jLabel4)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 420, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel1Layout.createSequentialGroup()
                                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 81, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(18, 18, 18)
                                .addComponent(txtRollno, javax.swing.GroupLayout.PREFERRED_SIZE, 420, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jLabel2)
                                    .addComponent(jLabel3))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(txtFullname, javax.swing.GroupLayout.PREFERRED_SIZE, 420, javax.swing.GroupLayout.PREFERRED_SIZE))))
                        .addGap(58, 58, 58)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addComponent(tblExportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(tbnInportXML, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(btnSave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(btnEdit, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(btnDelete, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(99, 99, 99)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(74, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtRollno, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSave))
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(36, 36, 36)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(txtFullname, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel2))
                        .addGap(36, 36, 36)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel3)
                            .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(41, 41, 41)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(jLabel4))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 17, Short.MAX_VALUE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(27, 27, 27)
                        .addComponent(btnEdit)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btnDelete)
                        .addGap(28, 28, 28)
                        .addComponent(tbnInportXML)
                        .addGap(35, 35, 35)))
                .addComponent(tblExportXML)
                .addGap(33, 33, 33)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 177, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollNo = txtRollno.getText();
        String fullName = txtFullname.getText();
        String gender = cbGender.getSelectedItem().toString();
        String address = txtAddress.getText();
        
        if(rollNo.isEmpty() || fullName.isEmpty()){
            JOptionPane.showMessageDialog(this, "RollNo is empty || Fullname is empty ?");
            return;
        }
        for (Student student : studentList) {
            if(student.getRollNo().equalsIgnoreCase(rollNo)){
                JOptionPane.showMessageDialog(rootPane, "RollNo existed !!!");
                return;
            }
        }
        Student std = new Student(rollNo, fullName, gender, address);
        studentList.add(std);
        
        tableModel.addRow(new Object[] {rollNo, fullName, gender, address});
    }                                       

    private void tbnInportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        FileInputStream fis = null;
        
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler hander = new StudentHandler();
            parser.parse(fis, hander);
            
            studentList = hander.getStudentList();
            
            tableModel.setRowCount(0);
            
            for (Student student : studentList) {
                tableModel.addRow(new Object[] {
                    student.getRollNo(), student.getFullName(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
        JOptionPane.showMessageDialog(rootPane, "Import success!!!");
    }                                            

    private void tblExportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<studentList>\n" +
                                    body+
                    "\n</studentList>";
        
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream("student.xml");
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        }finally{
            if(fos != null){
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                            

    private void btnEditActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        
        if (tblStudent.getSelectedRow() == -1) {
            if (tblStudent.getRowCount() == 0) {
                JOptionPane.showMessageDialog(rootPane, "Table is empty");
            } else {
                JOptionPane.showMessageDialog(rootPane, "You must select a students");
            }
        } else {
            tableModel.setValueAt(txtRollno.getText(), tblStudent.getSelectedRow(), 0);
            tableModel.setValueAt(txtFullname.getText(), tblStudent.getSelectedRow(), 1);
            tableModel.setValueAt(cbGender.getSelectedItem().toString(), tblStudent.getSelectedRow(), 2);
            tableModel.setValueAt(txtAddress.getText(), tblStudent.getSelectedRow(), 3);
        }
        
        
        
        
    }                                       

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        if (tblStudent.getSelectedRow() == -1) {
            if (tblStudent.getRowCount() == 0) {
                JOptionPane.showMessageDialog(rootPane, "Table is empty");
            } else {
                JOptionPane.showMessageDialog(rootPane, "You must select a students");
            }
        } else {
             tableModel.removeRow(tblStudent.getSelectedRow());
        }
       
    }                                         

    private void tblStudentMouseClicked(java.awt.event.MouseEvent evt) {                                        
        // TODO add your handling code here:
        txtRollno.setText(tableModel.getValueAt(tblStudent.getSelectedRow(), 0).toString());
        txtFullname.setText(tableModel.getValueAt(tblStudent.getSelectedRow(), 1).toString());
        cbGender.setSelectedItem(tableModel.getValueAt(tblStudent.getSelectedRow(), 2).toString());
        txtAddress.setText(tableModel.getValueAt(tblStudent.getSelectedRow(), 3).toString());
        
    }                                       

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnEdit;
    private javax.swing.JButton btnSave;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JButton tblExportXML;
    private javax.swing.JTable tblStudent;
    private javax.swing.JButton tbnInportXML;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullname;
    private javax.swing.JTextField txtRollno;
    // End of variables declaration                   
}

Đường Thanh Bình

2020-04-17 15:05:10

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Lession2;

/**
 *
 * @author Administrator
 */
public class Student {
    String rollNo,fullname,gender,address;

    public Student() {
    }

    public Student(String roolNo, String fullname, String gender, String address) {
        this.rollNo = roolNo;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRoolNo() {
        return rollNo;
    }

    public void setRoolNo(String roolNo) {
        this.rollNo = roolNo;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }
    public String getXMLString(){
        return "<student>\n" +
               "<rollNo>"+rollNo+"</rollNo>\n" +
               "<fullname>"+fullname+"</fullname>\n" +
               "<address>"+address+"</address>\n" +
               "<gender>"+gender+"</gender>\n" +
               "</student>";
    }

    void setRollNo(String value) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    Object getRollNo() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Lession2;

import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author Administrator
 */
public class StudentHandler extends DefaultHandler{
     List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
           if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = true;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }

    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
          if(qName.equalsIgnoreCase("student")) {
            studentList.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = false;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }

    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
          String value = new String(ch, start, length);
        
        if(isRollNo) {
            currentStudent.setRollNo(value);
        } else if(isFullname) {
            currentStudent.setFullname(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentList() {
        return studentList;
    }
 }

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Lession2;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author Administrator
 */
public class StudentJFrame extends javax.swing.JFrame {

    /**
     * Creates new form StudentJFrame
     */
    public StudentJFrame() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        txtFullName = new javax.swing.JTextField();
        txtAddress = new javax.swing.JTextField();
        cbGender = new javax.swing.JComboBox<>();
        btnSave = new javax.swing.JButton();
        btnImportXML = new javax.swing.JButton();
        btnExportXML = new javax.swing.JButton();
        btnUpdate = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("inputt Student's Detail Informaion"));

        jLabel1.setText("Roll No");

        jLabel2.setText("Full Name");

        jLabel3.setText("Gender");

        jLabel4.setText("Address");

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "Female" }));

        btnSave.setText("Save");
        btnSave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnSaveActionPerformed(evt);
            }
        });

        btnImportXML.setText("Import XML");
        btnImportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnImportXMLActionPerformed(evt);
            }
        });

        btnExportXML.setText("Export XML");
        btnExportXML.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnExportXMLActionPerformed(evt);
            }
        });

        btnUpdate.setText("Update");

        btnDelete.setText("Delete");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Roll No", "Full Name", "Gender", "Address"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(tblStudent);

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(41, 41, 41)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jScrollPane1)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel1)
                            .addComponent(jLabel2)
                            .addComponent(jLabel3)
                            .addComponent(jLabel4))
                        .addGap(66, 66, 66)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, 357, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, 357, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 357, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(85, 85, 85)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(btnDelete, javax.swing.GroupLayout.PREFERRED_SIZE, 103, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(btnUpdate, javax.swing.GroupLayout.PREFERRED_SIZE, 103, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(btnExportXML, javax.swing.GroupLayout.PREFERRED_SIZE, 103, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(btnImportXML, javax.swing.GroupLayout.PREFERRED_SIZE, 103, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(btnSave, javax.swing.GroupLayout.PREFERRED_SIZE, 103, javax.swing.GroupLayout.PREFERRED_SIZE))))
                .addContainerGap(470, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(27, 27, 27)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnSave))
                .addGap(20, 20, 20)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnImportXML))
                .addGap(24, 24, 24)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnExportXML))
                .addGap(20, 20, 20)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnUpdate))
                .addGap(28, 28, 28)
                .addComponent(btnDelete)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 52, Short.MAX_VALUE)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 97, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(334, 334, 334))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(41, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
    }                                         

    private void btnSaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollNo = txtRollNo.getText();
        String fullname = txtFullName.getText();
        String gender = cbGender.getSelectedItem().toString();
        String address = txtAddress.getText();
        
        if(rollNo.isEmpty() || fullname.isEmpty()){
            JOptionPane.showMessageDialog(rootPane, "RollNo is empty || fullname is empty?");
            return;
        }
        
        for (Student student : studentList){
             if(student.getRollNo().equalsIgnoreCase(rollNo)) {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed!!!");
                return;
        }
    }                                       

    private void btnImportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        fileInputStream fis = null;
        try{
         // TODO add your handling code here:
         fis = new FileInputStream("student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();
            
            StudentHandler handler = new StudentHandler();
            
            parser.parse(fis, handler);
            
            studentList = handler.getStudentList();
            
            tableModel.setRowCount(0);
            
            for (Student student : studentList) {
                tableModel.addRow(new Object[] {
                    student.getRollNo(), student.getFullname(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Import success!!!");
    }                                            

    private void btnExportXMLActionPerformed(java.awt.event.ActionEvent evt) {                                             
        // TODO add your handling code here:
        StringBuilder builder = new StringBuilder();        
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }
        
        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<studentList>\n" +
                                    body+
                    "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("student.xml");
            
            byte[] data = xml.getBytes();
            
            fos.write(data);
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                            

    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentJFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnExportXML;
    private javax.swing.JButton btnImportXML;
    private javax.swing.JButton btnSave;
    private javax.swing.JButton btnUpdate;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullName;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}

Trương Công Vinh

2020-04-17 11:30:01

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Lession3.reCoding;

/**
 *
 * @author DELL
 */
public class Student {

    String rollNo, fullname, gender, address;

    public Student() {
    }

    public Student(String rollNo, String fullname, String gender, String address) {
        this.rollNo = rollNo;
        this.fullname = fullname;
        this.gender = gender;
        this.address = address;
    }

    public String getRollNo() {
        return rollNo;
    }

    public void setRollNo(String rollNo) {
        this.rollNo = rollNo;
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "Student{" + "rollNo=" + rollNo + ", fullname=" + fullname + ", gender=" + gender + ", address=" + address + '}';
    }

    public String getXMLString() {
        return "<student>\n"
                + "<rollNo>" + rollNo + "</rollNo>\n"
                + "<fullname>" + fullname + "</fullname>\n"
                + "<address>" + address + "</address>\n"
                + "<gender>" + gender + "</gender>\n"
                + "</student>";
    }

}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Lession3.reCoding;
import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
 *
 * @author DELL
 */
public class StudentHandler extends DefaultHandler{
    List<Student> studentList = new ArrayList<>();
    Student currentStudent = null;
    
    boolean isRollNo = false, isFullname = false, isGender = false, isAddress = false;
    
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            currentStudent = new Student();
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = true;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = true;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = true;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("student")) {
            studentList.add(currentStudent);
            currentStudent = null;
        } else if(qName.equalsIgnoreCase("rollNo")) {
            isRollNo = false;
        } else if(qName.equalsIgnoreCase("fullname")) {
            isFullname = false;
        } else if(qName.equalsIgnoreCase("gender")) {
            isGender = false;
        } else if(qName.equalsIgnoreCase("address")) {
            isAddress = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        String value = new String(ch, start, length);
        
        if(isRollNo) {
            currentStudent.setRollNo(value);
        } else if(isFullname) {
            currentStudent.setFullname(value);
        } else if(isGender) {
            currentStudent.setGender(value);
        } else if(isAddress) {
            currentStudent.setAddress(value);
        }
    }

    public List<Student> getStudentList() {
        return studentList;
    }
    
}

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Lession3.reCoding;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;

/**
 *
 * @author DELL
 */
public class StudentJFrame extends javax.swing.JFrame {

    DefaultTableModel tableModel;
    List<Student> studentList = new ArrayList<>();

    /**
     * Creates new form StudentJFrame
     */
    public StudentJFrame() {
        initComponents();
        tableModel = (DefaultTableModel) tblStudent.getModel();

    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTable2 = new javax.swing.JTable();
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtRollNo = new javax.swing.JTextField();
        txtFullName = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        txtAddress = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        cbGender = new javax.swing.JComboBox<>();
        btnsave = new javax.swing.JButton();
        btnimport = new javax.swing.JButton();
        btnexport = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        btnupdate = new javax.swing.JButton();
        jScrollPane3 = new javax.swing.JScrollPane();
        tblStudent = new javax.swing.JTable();

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            },
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
            }
        ));
        jScrollPane1.setViewportView(jTable1);

        jTable2.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            },
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
            }
        ));
        jScrollPane2.setViewportView(jTable2);

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setText("Rollno :");

        jLabel2.setText("Fullname : ");

        jLabel3.setText("Gender : ");

        jLabel4.setText("Address :");

        cbGender.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Male", "Female", " " }));

        btnsave.setText("Save");
        btnsave.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnsaveActionPerformed(evt);
            }
        });

        btnimport.setText("Import XML");
        btnimport.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnimportActionPerformed(evt);
            }
        });

        btnexport.setText("Export XML");
        btnexport.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnexportActionPerformed(evt);
            }
        });

        btnDelete.setText("Delete");
        btnDelete.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteActionPerformed(evt);
            }
        });

        btnupdate.setText("update");
        btnupdate.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnupdateActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addGap(28, 28, 28)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel4)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 290, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel3)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(219, 219, 219))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel2)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, 290, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, 290, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 80, Short.MAX_VALUE)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(btnupdate, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(btnimport, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btnexport, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btnsave, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(btnDelete, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
                .addGap(47, 47, 47))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtRollNo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnsave))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(txtFullName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnimport))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(cbGender, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnexport))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jLabel4)
                        .addComponent(txtAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addComponent(btnDelete))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(btnupdate)
                .addContainerGap(78, Short.MAX_VALUE))
        );

        tblStudent.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Rollno", "Fullname", "Gender", "Address"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane3.setViewportView(tblStudent);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(29, 29, 29)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane3)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(0, 0, Short.MAX_VALUE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(42, 42, 42)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 187, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(34, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void btnsaveActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String rollNo = txtRollNo.getText();
        String fullname = txtFullName.getText();
        String gender = cbGender.getSelectedItem().toString();
        String address = txtAddress.getText();

        if (rollNo.isEmpty() || fullname.isEmpty()) {
            JOptionPane.showMessageDialog(rootPane, "RollNo is empty || fullname is empty?");
            return;
        }

        for (Student student : studentList) {
            if (student.getRollNo().equalsIgnoreCase(rollNo)) {
                JOptionPane.showMessageDialog(rootPane, "RollNo existed!!!");
                return;
            }
        }

        Student std = new Student(rollNo, fullname, gender, address);
        studentList.add(std);

        tableModel.addRow(new Object[]{rollNo, fullname, gender, address});
    }                                       

    private void btnimportActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        importXML();
        

        JOptionPane.showMessageDialog(rootPane, "Import success!!!");
    }                                         

    private void btnexportActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        
        exportXML();
        JOptionPane.showMessageDialog(rootPane, "Save success!!!");
    }                                         

    private void btnupdateActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        String rollno = txtRollNo.getText();
        for (Student student : studentList) {
            if (student.getRollNo().equalsIgnoreCase(rollno)) {
                student.setFullname(txtFullName.getText());
                student.setRollNo(txtRollNo.getText());
                student.setGender(cbGender.getSelectedItem().toString());
                student.setAddress(txtAddress.getText());
            }
        }
        exportXML();
        importXML();
        JOptionPane.showMessageDialog(rootPane, "Edit Success !!");
    }                                         

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        
        String option = JOptionPane.showInputDialog("Enter rollno : ");
        System.out.println(option);
        
        for (Student student : studentList) {
            if (student.getRollNo().equalsIgnoreCase(option)) {
                studentList.remove(student);
                break;
            }
        }
         exportXML();
         importXML();

        JOptionPane.showMessageDialog(rootPane, "delete success!!!");
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(StudentJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new StudentJFrame().setVisible(true);
            }
        });
    }
    public void exportXML(){
        StringBuilder builder = new StringBuilder();
        for (Student student : studentList) {
            builder.append(student.getXMLString());
        }

        String body = builder.toString();
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
                + "<studentList>\n"
                + body
                + "\n</studentList>";
        //save into file student.xml
        FileOutputStream fos = null;

        try {
            fos = new FileOutputStream("d://XML/student.xml");

            byte[] data = xml.getBytes();

            fos.write(data);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
    public void importXML(){
        FileInputStream fis = null;
        try {
            // TODO add your handling code here:
            fis = new FileInputStream("d://XML/student.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();

            StudentHandler handler = new StudentHandler();

            parser.parse(fis, handler);

            studentList = handler.getStudentList();

            tableModel.setRowCount(0);

            for (Student student : studentList) {
                tableModel.addRow(new Object[]{
                    student.getRollNo(), student.getFullname(),
                    student.getGender(), student.getAddress()
                });
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                Logger.getLogger(StudentJFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnexport;
    private javax.swing.JButton btnimport;
    private javax.swing.JButton btnsave;
    private javax.swing.JButton btnupdate;
    private javax.swing.JComboBox<String> cbGender;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JTable jTable1;
    private javax.swing.JTable jTable2;
    private javax.swing.JTable tblStudent;
    private javax.swing.JTextField txtAddress;
    private javax.swing.JTextField txtFullName;
    private javax.swing.JTextField txtRollNo;
    // End of variables declaration                   
}