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Trang Chủ Java Advanced Chương trình quản lý sản phẩm - quản lý tin tức - quản lý bán hàng - Lập trình Java

Chương trình quản lý sản phẩm - quản lý tin tức - quản lý bán hàng - Lập trình Java

by GokiSoft.com - 16:58 29/10/2021 3,123 Lượt Xem

THiết kế cách chức năng giao diện của chương trình sau 

Yêu cầu:

- Tạo file category.xml -> lưu thông tin danh mục sản phẩm

- Tạo file product.json -> lưu thông tin sản phẩm.

Viết chức năng chương trình trên.

Bình luận



Chia sẻ từ lớp học

TRẦN VĂN ĐIỆP [Teacher]

Ngày viết: 17:25 14/04/2021



/*
 * 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 aptech.bt2249;

import aptech.xml.lesson01.LibraryParser;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
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 CategoryFrame extends javax.swing.JFrame {
    List<String> dataList = new ArrayList<>();
    int currentIndex = -1;
    
    DefaultTableModel tableModel;

    /**
     * Creates new form CategoryFrame
     */
    public CategoryFrame() {
        initComponents();
        
        tableModel = (DefaultTableModel) tblCategory.getModel();
        
        tblCategory.addMouseListener(new MouseListener() {
            @Override
            public void mouseClicked(MouseEvent e) {
                currentIndex = tblCategory.getSelectedRow();
                
                txtCategoryName.setText(dataList.get(currentIndex));
            }

            @Override
            public void mousePressed(MouseEvent e) {
            }

            @Override
            public void mouseReleased(MouseEvent e) {
            }

            @Override
            public void mouseEntered(MouseEvent e) {
            }

            @Override
            public void mouseExited(MouseEvent e) {
            }
        });
        
        //Doc noi dung xml
        try {
            File file = new File("category.xml");
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser;
            parser = factory.newSAXParser();
            CategoryHadler hadler = new CategoryHadler();
            parser.parse(file, hadler);
            
            dataList = hadler.dataList;
            showData();
        } catch (ParserConfigurationException ex) {
            Logger.getLogger(CategoryFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SAXException ex) {
            Logger.getLogger(CategoryFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(CategoryFrame.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /**
     * 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();
        txtCategoryName = new javax.swing.JTextField();
        btnAdd = new javax.swing.JButton();
        btnEdit = new javax.swing.JButton();
        btnDelete = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblCategory = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Category Form");

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

        jLabel1.setText("Category Name:");

        btnAdd.setText("Add");
        btnAdd.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnAddActionPerformed(evt);
            }
        });

        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(19, 19, 19)
                .addComponent(jLabel1)
                .addGap(39, 39, 39)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(btnAdd)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(btnEdit)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(btnDelete))
                    .addComponent(txtCategoryName, javax.swing.GroupLayout.PREFERRED_SIZE, 323, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(30, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(16, 16, 16)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtCategoryName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(btnAdd)
                    .addComponent(btnEdit)
                    .addComponent(btnDelete))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

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

            },
            new String [] {
                "ID", "Category Name"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false
            };

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

        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.UNRELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

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

    private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {                                       
        // TODO add your handling code here:
        if(currentIndex >= 0) {
            JOptionPane.showMessageDialog(rootPane, "Not add");
            return;
        }
        String categoryName = txtCategoryName.getText();
        
        dataList.add(categoryName);
        tableModel.addRow(new Object[] {tableModel.getRowCount() + 1, categoryName});
        
        saveFile();
    }                                      

    void saveFile() {
        FileOutputStream fos = null;
        
        try {
            fos = new FileOutputStream("category.xml");
            
            String xml = "";
            
            for (String value : dataList) {
                xml += "<category>"+value+"</category>\n";
            }
            
            xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "\n" +
                    "<categories>\n" + xml +
                    "</categories>";
            
            byte[] data = xml.getBytes("utf8");
            
            fos.write(data);
        } catch (FileNotFoundException ex) {
            Logger.getLogger(CategoryFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (UnsupportedEncodingException ex) {
            Logger.getLogger(CategoryFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(CategoryFrame.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                fos.close();
            } catch (IOException ex) {
                Logger.getLogger(CategoryFrame.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        
    }
    
    void showData() {
        tableModel.setRowCount(0);
        for (String value : dataList) {
            tableModel.addRow(new Object[] {tableModel.getRowCount() + 1, value});
        }
    }
    
    private void btnEditActionPerformed(java.awt.event.ActionEvent evt) {                                        
        // TODO add your handling code here:
        String value = txtCategoryName.getText();
        if(currentIndex >= 0) {
            dataList.set(currentIndex, value);
            currentIndex = -1;
            saveFile();
            showData();
        } else {
            JOptionPane.showMessageDialog(rootPane, "Not edit");
        }
    }                                       

    private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        String value = txtCategoryName.getText();
        if(currentIndex >= 0) {
            dataList.remove(currentIndex);
            currentIndex = -1;
            saveFile();
            showData();
        } else {
            JOptionPane.showMessageDialog(rootPane, "Not delete");
        }
    }                                         

    /**
     * @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(CategoryFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(CategoryFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(CategoryFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(CategoryFrame.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 CategoryFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnAdd;
    private javax.swing.JButton btnDelete;
    private javax.swing.JButton btnEdit;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable tblCategory;
    private javax.swing.JTextField txtCategoryName;
    // End of variables declaration                   
}


TRẦN VĂN ĐIỆP [Teacher]

Ngày viết: 17:05 14/04/2021



/*
 * 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 aptech.bt2249;

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 CategoryHadler extends DefaultHandler{
    List<String> dataList = new ArrayList<>();
    boolean isCategory = false;

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        if(qName.equalsIgnoreCase("category")) {
            isCategory = true;
        }
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        if(qName.equalsIgnoreCase("category")) {
            isCategory = false;
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        if(isCategory) {
            String value = new String(ch, start, length);
            dataList.add(value);
        }
    }
}


Nguyễn Tiến Đạt [T2008A]

Ngày viết: 16:20 14/04/2021


#Category.java


/*
 * 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 Java2.lesson10;

/**
 *
 * @author MyPC
 */
public class Category {

    String categoryName;

    public Category() {
    }

    public Category(String categoryName) {
        this.categoryName = categoryName;
    }

    public String getCategoryName() {
        return categoryName;
    }

    public void setCategoryName(String categoryName) {
        this.categoryName = categoryName;
    }
    
    public String toXML(){
        return"    " + "<category>"+categoryName+"</category>\n";
    }
}


#Product.java


/*
 * 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 Java2.lesson10;

/**
 *
 * @author MyPC
 */
public class Product {
    String name, categoryName, description;
    float price;

    public Product() {
    }

    public Product(String name, String categoryName, String description, float price) {
        this.name = name;
        this.categoryName = categoryName;
        this.description = description;
        this.price = price;
    }

    public String getName() {
        return name;
    }

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

    public String getCategoryName() {
        return categoryName;
    }

    public void setCategoryName(String categoryName) {
        this.categoryName = categoryName;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public float getPrice() {
        return price;
    }

    public void setPrice(float price) {
        this.price = price;
    }

    @Override
    public String toString() {
        return "Product{" + "name=" + name + ", categoryName=" + categoryName + ", description=" + description + ", price=" + price + '}';
    }
    
    
}


#ProductFrame.form


<?xml version="1.0" encoding="UTF-8" ?>

<Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JFrameFormInfo">
  <Properties>
    <Property name="defaultCloseOperation" type="int" value="3"/>
  </Properties>
  <SyntheticProperties>
    <SyntheticProperty name="formSizePolicy" type="int" value="1"/>
    <SyntheticProperty name="generateCenter" type="boolean" value="false"/>
  </SyntheticProperties>
  <AuxValues>
    <AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
    <AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
    <AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
    <AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
    <AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
    <AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
    <AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
    <AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
    <AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
  </AuxValues>

  <Layout>
    <DimensionLayout dim="0">
      <Group type="103" groupAlignment="0" attributes="0">
          <Group type="102" attributes="0">
              <EmptySpace max="-2" attributes="0"/>
              <Group type="103" groupAlignment="0" max="-2" attributes="0">
                  <Component id="jPanel1" max="32767" attributes="0"/>
                  <Component id="jPanel2" max="32767" attributes="0"/>
              </Group>
              <EmptySpace max="32767" attributes="0"/>
          </Group>
      </Group>
    </DimensionLayout>
    <DimensionLayout dim="1">
      <Group type="103" groupAlignment="0" attributes="0">
          <Group type="102" alignment="0" attributes="0">
              <EmptySpace max="-2" attributes="0"/>
              <Component id="jPanel1" min="-2" max="-2" attributes="0"/>
              <EmptySpace type="separate" max="-2" attributes="0"/>
              <Component id="jPanel2" min="-2" max="-2" attributes="0"/>
              <EmptySpace max="32767" attributes="0"/>
          </Group>
      </Group>
    </DimensionLayout>
  </Layout>
  <SubComponents>
    <Container class="javax.swing.JPanel" name="jPanel1">
      <Properties>
        <Property name="border" type="javax.swing.border.Border" editor="org.netbeans.modules.form.editors2.BorderEditor">
          <Border info="org.netbeans.modules.form.compat2.border.TitledBorderInfo">
            <TitledBorder title="Nhap thong tin"/>
          </Border>
        </Property>
      </Properties>

      <Layout>
        <DimensionLayout dim="0">
          <Group type="103" groupAlignment="0" attributes="0">
              <Group type="102" attributes="0">
                  <Group type="103" groupAlignment="0" attributes="0">
                      <Group type="102" alignment="0" attributes="0">
                          <EmptySpace min="-2" pref="216" max="-2" attributes="0"/>
                          <Component id="btnInsertCategory" min="-2" pref="59" max="-2" attributes="0"/>
                          <EmptySpace min="-2" pref="51" max="-2" attributes="0"/>
                          <Component id="btnEditCategory" min="-2" pref="69" max="-2" attributes="0"/>
                          <EmptySpace min="-2" pref="57" max="-2" attributes="0"/>
                          <Component id="btnDeleteCategory" min="-2" pref="68" max="-2" attributes="0"/>
                      </Group>
                      <Group type="102" alignment="0" attributes="0">
                          <EmptySpace min="-2" pref="21" max="-2" attributes="0"/>
                          <Component id="jLabel1" min="-2" max="-2" attributes="0"/>
                          <EmptySpace min="-2" pref="34" max="-2" attributes="0"/>
                          <Component id="txtCategory" min="-2" pref="498" max="-2" attributes="0"/>
                      </Group>
                      <Group type="102" alignment="0" attributes="0">
                          <EmptySpace max="-2" attributes="0"/>
                          <Component id="jScrollPane1" min="-2" pref="738" max="-2" attributes="0"/>
                      </Group>
                  </Group>
                  <EmptySpace pref="36" max="32767" attributes="0"/>
              </Group>
          </Group>
        </DimensionLayout>
        <DimensionLayout dim="1">
          <Group type="103" groupAlignment="0" attributes="0">
              <Group type="102" alignment="0" attributes="0">
                  <EmptySpace max="-2" attributes="0"/>
                  <Group type="103" groupAlignment="3" attributes="0">
                      <Component id="jLabel1" alignment="3" min="-2" max="-2" attributes="0"/>
                      <Component id="txtCategory" alignment="3" min="-2" max="-2" attributes="0"/>
                  </Group>
                  <EmptySpace min="-2" pref="19" max="-2" attributes="0"/>
                  <Group type="103" groupAlignment="0" max="-2" attributes="0">
                      <Component id="btnEditCategory" pref="33" max="32767" attributes="0"/>
                      <Component id="btnInsertCategory" alignment="0" max="32767" attributes="0"/>
                      <Component id="btnDeleteCategory" alignment="0" max="32767" attributes="0"/>
                  </Group>
                  <EmptySpace max="-2" attributes="0"/>
                  <Component id="jScrollPane1" min="-2" pref="124" max="-2" attributes="0"/>
                  <EmptySpace max="32767" attributes="0"/>
              </Group>
          </Group>
        </DimensionLayout>
      </Layout>
      <SubComponents>
        <Component class="javax.swing.JLabel" name="jLabel1">
          <Properties>
            <Property name="text" type="java.lang.String" value="Ten danh muc:"/>
          </Properties>
        </Component>
        <Component class="javax.swing.JTextField" name="txtCategory">
        </Component>
        <Component class="java.awt.Button" name="btnInsertCategory">
          <Properties>
            <Property name="label" type="java.lang.String" value="Them"/>
          </Properties>
          <Events>
            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="btnInsertCategoryActionPerformed"/>
          </Events>
        </Component>
        <Component class="java.awt.Button" name="btnEditCategory">
          <Properties>
            <Property name="label" type="java.lang.String" value="Sua"/>
          </Properties>
          <Events>
            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="btnEditCategoryActionPerformed"/>
          </Events>
        </Component>
        <Component class="java.awt.Button" name="btnDeleteCategory">
          <Properties>
            <Property name="label" type="java.lang.String" value="Xoa"/>
          </Properties>
          <Events>
            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="btnDeleteCategoryActionPerformed"/>
          </Events>
        </Component>
        <Container class="javax.swing.JScrollPane" name="jScrollPane1">
          <AuxValues>
            <AuxValue name="autoScrollPane" type="java.lang.Boolean" value="true"/>
          </AuxValues>

          <Layout class="org.netbeans.modules.form.compat2.layouts.support.JScrollPaneSupportLayout"/>
          <SubComponents>
            <Component class="javax.swing.JTable" name="tblCategory">
              <Properties>
                <Property name="model" type="javax.swing.table.TableModel" editor="org.netbeans.modules.form.editors2.TableModelEditor">
                  <Table columnCount="2" rowCount="0">
                    <Column editable="true" title="STT" type="java.lang.Object"/>
                    <Column editable="false" title="Ten danh muc" type="java.lang.Object"/>
                  </Table>
                </Property>
                <Property name="columnModel" type="javax.swing.table.TableColumnModel" editor="org.netbeans.modules.form.editors2.TableColumnModelEditor">
                  <TableColumnModel selectionModel="0">
                    <Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
                      <Title/>
                      <Editor/>
                      <Renderer/>
                    </Column>
                    <Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
                      <Title/>
                      <Editor/>
                      <Renderer/>
                    </Column>
                  </TableColumnModel>
                </Property>
                <Property name="tableHeader" type="javax.swing.table.JTableHeader" editor="org.netbeans.modules.form.editors2.JTableHeaderEditor">
                  <TableHeader reorderingAllowed="true" resizingAllowed="true"/>
                </Property>
              </Properties>
            </Component>
          </SubComponents>
        </Container>
      </SubComponents>
    </Container>
    <Container class="javax.swing.JPanel" name="jPanel2">
      <Properties>
        <Property name="border" type="javax.swing.border.Border" editor="org.netbeans.modules.form.editors2.BorderEditor">
          <Border info="org.netbeans.modules.form.compat2.border.TitledBorderInfo">
            <TitledBorder title="Nhap thong tin san pham"/>
          </Border>
        </Property>
      </Properties>

      <Layout>
        <DimensionLayout dim="0">
          <Group type="103" groupAlignment="0" attributes="0">
              <Group type="102" attributes="0">
                  <Group type="103" groupAlignment="0" attributes="0">
                      <Group type="102" attributes="0">
                          <Group type="103" groupAlignment="0" attributes="0">
                              <Group type="102" attributes="0">
                                  <EmptySpace min="-2" pref="26" max="-2" attributes="0"/>
                                  <Group type="103" groupAlignment="1" attributes="0">
                                      <Component id="jLabel5" min="-2" max="-2" attributes="0"/>
                                      <Component id="jLabel4" min="-2" max="-2" attributes="0"/>
                                      <Component id="jLabel3" min="-2" max="-2" attributes="0"/>
                                      <Component id="jLabel2" min="-2" max="-2" attributes="0"/>
                                  </Group>
                                  <EmptySpace min="-2" pref="43" max="-2" attributes="0"/>
                                  <Group type="103" groupAlignment="0" max="-2" attributes="0">
                                      <Component id="txtName" max="32767" attributes="0"/>
                                      <Component id="boxCategory" min="-2" max="-2" attributes="0"/>
                                      <Component id="txtPrice" alignment="0" max="32767" attributes="0"/>
                                      <Component id="txtDescription" pref="495" max="32767" attributes="0"/>
                                  </Group>
                              </Group>
                              <Group type="102" alignment="0" attributes="0">
                                  <EmptySpace min="-2" pref="217" max="-2" attributes="0"/>
                                  <Component id="btnInsertProduct" min="-2" pref="62" max="-2" attributes="0"/>
                                  <EmptySpace min="-2" pref="33" max="-2" attributes="0"/>
                                  <Component id="btnEditProduct" min="-2" pref="62" max="-2" attributes="0"/>
                                  <EmptySpace min="-2" pref="39" max="-2" attributes="0"/>
                                  <Component id="btnDeleteProduct" min="-2" pref="62" max="-2" attributes="0"/>
                                  <EmptySpace min="-2" pref="40" max="-2" attributes="0"/>
                                  <Component id="btnProductSearch" min="-2" pref="83" max="-2" attributes="0"/>
                              </Group>
                          </Group>
                          <EmptySpace min="0" pref="129" max="32767" attributes="0"/>
                      </Group>
                      <Group type="102" alignment="0" attributes="0">
                          <EmptySpace max="-2" attributes="0"/>
                          <Component id="jScrollPane2" max="32767" attributes="0"/>
                      </Group>
                  </Group>
                  <EmptySpace max="-2" attributes="0"/>
              </Group>
          </Group>
        </DimensionLayout>
        <DimensionLayout dim="1">
          <Group type="103" groupAlignment="0" attributes="0">
              <Group type="102" alignment="0" attributes="0">
                  <EmptySpace max="-2" attributes="0"/>
                  <Group type="103" groupAlignment="3" attributes="0">
                      <Component id="jLabel2" alignment="3" min="-2" max="-2" attributes="0"/>
                      <Component id="txtName" alignment="3" min="-2" max="-2" attributes="0"/>
                  </Group>
                  <EmptySpace type="separate" max="-2" attributes="0"/>
                  <Group type="103" groupAlignment="3" attributes="0">
                      <Component id="jLabel3" alignment="3" min="-2" max="-2" attributes="0"/>
                      <Component id="boxCategory" alignment="3" min="-2" max="-2" attributes="0"/>
                  </Group>
                  <EmptySpace type="separate" max="-2" attributes="0"/>
                  <Group type="103" groupAlignment="3" attributes="0">
                      <Component id="jLabel4" alignment="3" min="-2" max="-2" attributes="0"/>
                      <Component id="txtPrice" alignment="3" min="-2" max="-2" attributes="0"/>
                  </Group>
                  <EmptySpace type="separate" max="-2" attributes="0"/>
                  <Group type="103" groupAlignment="3" attributes="0">
                      <Component id="jLabel5" alignment="3" min="-2" max="-2" attributes="0"/>
                      <Component id="txtDescription" alignment="3" min="-2" max="-2" attributes="0"/>
                  </Group>
                  <EmptySpace min="-2" pref="21" max="-2" attributes="0"/>
                  <Group type="103" groupAlignment="0" attributes="0">
                      <Component id="btnInsertProduct" min="-2" pref="36" max="-2" attributes="0"/>
                      <Component id="btnEditProduct" min="-2" pref="36" max="-2" attributes="0"/>
                      <Component id="btnDeleteProduct" min="-2" pref="36" max="-2" attributes="0"/>
                      <Component id="btnProductSearch" min="-2" pref="36" max="-2" attributes="0"/>
                  </Group>
                  <EmptySpace max="-2" attributes="0"/>
                  <Component id="jScrollPane2" min="-2" pref="150" max="-2" attributes="0"/>
                  <EmptySpace max="32767" attributes="0"/>
              </Group>
          </Group>
        </DimensionLayout>
      </Layout>
      <SubComponents>
        <Component class="javax.swing.JLabel" name="jLabel2">
          <Properties>
            <Property name="text" type="java.lang.String" value="Ten SP:"/>
          </Properties>
        </Component>
        <Component class="javax.swing.JLabel" name="jLabel3">
          <Properties>
            <Property name="text" type="java.lang.String" value="Danh muc SP:"/>
          </Properties>
        </Component>
        <Component class="javax.swing.JTextField" name="txtName">
        </Component>
        <Component class="javax.swing.JComboBox" name="boxCategory">
          <Properties>
            <Property name="model" type="javax.swing.ComboBoxModel" editor="org.netbeans.modules.form.editors2.ComboBoxModelEditor">
              <StringArray count="0"/>
            </Property>
          </Properties>
          <AuxValues>
            <AuxValue name="JavaCodeGenerator_TypeParameters" type="java.lang.String" value="&lt;String&gt;"/>
          </AuxValues>
        </Component>
        <Component class="javax.swing.JLabel" name="jLabel4">
          <Properties>
            <Property name="text" type="java.lang.String" value="Gia SP:"/>
          </Properties>
        </Component>
        <Component class="javax.swing.JTextField" name="txtPrice">
        </Component>
        <Component class="javax.swing.JLabel" name="jLabel5">
          <Properties>
            <Property name="text" type="java.lang.String" value="Mo ta SP:"/>
          </Properties>
        </Component>
        <Component class="javax.swing.JTextField" name="txtDescription">
        </Component>
        <Component class="java.awt.Button" name="btnInsertProduct">
          <Properties>
            <Property name="label" type="java.lang.String" value="Them"/>
          </Properties>
          <Events>
            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="btnInsertProductActionPerformed"/>
          </Events>
        </Component>
        <Component class="java.awt.Button" name="btnEditProduct">
          <Properties>
            <Property name="label" type="java.lang.String" value="Sua"/>
          </Properties>
          <Events>
            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="btnEditProductActionPerformed"/>
          </Events>
        </Component>
        <Component class="java.awt.Button" name="btnDeleteProduct">
          <Properties>
            <Property name="label" type="java.lang.String" value="Xoa"/>
          </Properties>
          <Events>
            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="btnDeleteProductActionPerformed"/>
          </Events>
        </Component>
        <Component class="java.awt.Button" name="btnProductSearch">
          <Properties>
            <Property name="label" type="java.lang.String" value="Tim kiem"/>
          </Properties>
          <Events>
            <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="btnProductSearchActionPerformed"/>
          </Events>
        </Component>
        <Container class="javax.swing.JScrollPane" name="jScrollPane2">
          <AuxValues>
            <AuxValue name="autoScrollPane" type="java.lang.Boolean" value="true"/>
          </AuxValues>

          <Layout class="org.netbeans.modules.form.compat2.layouts.support.JScrollPaneSupportLayout"/>
          <SubComponents>
            <Component class="javax.swing.JTable" name="tblProduct">
              <Properties>
                <Property name="model" type="javax.swing.table.TableModel" editor="org.netbeans.modules.form.editors2.TableModelEditor">
                  <Table columnCount="5" rowCount="0">
                    <Column editable="false" title="STT" type="java.lang.Object"/>
                    <Column editable="false" title="Ten" type="java.lang.Object"/>
                    <Column editable="false" title="Danh muc" type="java.lang.Object"/>
                    <Column editable="true" title="Gia" type="java.lang.Object"/>
                    <Column editable="false" title="Mo ta" type="java.lang.Object"/>
                  </Table>
                </Property>
                <Property name="columnModel" type="javax.swing.table.TableColumnModel" editor="org.netbeans.modules.form.editors2.TableColumnModelEditor">
                  <TableColumnModel selectionModel="0">
                    <Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
                      <Title/>
                      <Editor/>
                      <Renderer/>
                    </Column>
                    <Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
                      <Title/>
                      <Editor/>
                      <Renderer/>
                    </Column>
                    <Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
                      <Title/>
                      <Editor/>
                      <Renderer/>
                    </Column>
                    <Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
                      <Title/>
                      <Editor/>
                      <Renderer/>
                    </Column>
                    <Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
                      <Title/>
                      <Editor/>
                      <Renderer/>
                    </Column>
                  </TableColumnModel>
                </Property>
                <Property name="tableHeader" type="javax.swing.table.JTableHeader" editor="org.netbeans.modules.form.editors2.JTableHeaderEditor">
                  <TableHeader reorderingAllowed="true" resizingAllowed="true"/>
                </Property>
              </Properties>
            </Component>
          </SubComponents>
        </Container>
      </SubComponents>
    </Container>
  </SubComponents>
</Form>


#ProductFrame.java


/*
 * 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 Java2.lesson10;

import com.google.gson.Gson;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
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;

/**
 *
 * @author MyPC
 */
public class ProductFrame extends javax.swing.JFrame {

    DefaultTableModel tblModel;
    DefaultTableModel tblModel1;
    List<Category> categoryList = new ArrayList<>();
    List<Product> productList = new ArrayList<>();
    int index = -1;
    int index1 = -1;

    /**
     * Creates new form ProductFrame
     */
    public ProductFrame() {
        initComponents();
        tblModel = (DefaultTableModel) tblCategory.getModel();
        tblModel1 = (DefaultTableModel) tblProduct.getModel();
        tblCategory.addMouseListener(new MouseListener() {
            @Override
            public void mouseClicked(MouseEvent e) {
                index = tblCategory.getSelectedRow();
                txtCategory.setText(categoryList.get(index).getCategoryName());
            }

            @Override
            public void mousePressed(MouseEvent e) {

            }

            @Override
            public void mouseReleased(MouseEvent e) {

            }

            @Override
            public void mouseEntered(MouseEvent e) {

            }

            @Override
            public void mouseExited(MouseEvent e) {

            }
        });

        tblProduct.addMouseListener(new MouseListener() {
            @Override
            public void mouseClicked(MouseEvent e) {
                index1 = tblProduct.getSelectedRow();
                txtName.setText(productList.get(index1).getName());
                boxCategory.setSelectedItem(productList.get(index1).getCategoryName());
                txtPrice.setText(String.valueOf(productList.get(index1).getPrice()));
                txtDescription.setText(productList.get(index1).getDescription());
            }

            @Override
            public void mousePressed(MouseEvent e) {

            }

            @Override
            public void mouseReleased(MouseEvent e) {

            }

            @Override
            public void mouseEntered(MouseEvent e) {

            }

            @Override
            public void mouseExited(MouseEvent e) {

            }
        });
    }

    /**
     * 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">//GEN-BEGIN:initComponents
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        txtCategory = new javax.swing.JTextField();
        btnInsertCategory = new java.awt.Button();
        btnEditCategory = new java.awt.Button();
        btnDeleteCategory = new java.awt.Button();
        jScrollPane1 = new javax.swing.JScrollPane();
        tblCategory = new javax.swing.JTable();
        jPanel2 = new javax.swing.JPanel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        txtName = new javax.swing.JTextField();
        boxCategory = new javax.swing.JComboBox<>();
        jLabel4 = new javax.swing.JLabel();
        txtPrice = new javax.swing.JTextField();
        jLabel5 = new javax.swing.JLabel();
        txtDescription = new javax.swing.JTextField();
        btnInsertProduct = new java.awt.Button();
        btnEditProduct = new java.awt.Button();
        btnDeleteProduct = new java.awt.Button();
        btnProductSearch = new java.awt.Button();
        jScrollPane2 = new javax.swing.JScrollPane();
        tblProduct = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Nhap thong tin"));

        jLabel1.setText("Ten danh muc:");

        btnInsertCategory.setLabel("Them");
        btnInsertCategory.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnInsertCategoryActionPerformed(evt);
            }
        });

        btnEditCategory.setLabel("Sua");
        btnEditCategory.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnEditCategoryActionPerformed(evt);
            }
        });

        btnDeleteCategory.setLabel("Xoa");
        btnDeleteCategory.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteCategoryActionPerformed(evt);
            }
        });

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

            },
            new String [] {
                "STT", "Ten danh muc"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                true, false
            };

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

        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(216, 216, 216)
                        .addComponent(btnInsertCategory, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(51, 51, 51)
                        .addComponent(btnEditCategory, javax.swing.GroupLayout.PREFERRED_SIZE, 69, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(57, 57, 57)
                        .addComponent(btnDeleteCategory, javax.swing.GroupLayout.PREFERRED_SIZE, 68, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(21, 21, 21)
                        .addComponent(jLabel1)
                        .addGap(34, 34, 34)
                        .addComponent(txtCategory, javax.swing.GroupLayout.PREFERRED_SIZE, 498, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 738, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(36, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txtCategory, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(19, 19, 19)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(btnEditCategory, javax.swing.GroupLayout.DEFAULT_SIZE, 33, Short.MAX_VALUE)
                    .addComponent(btnInsertCategory, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(btnDeleteCategory, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 124, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder("Nhap thong tin san pham"));

        jLabel2.setText("Ten SP:");

        jLabel3.setText("Danh muc SP:");

        jLabel4.setText("Gia SP:");

        jLabel5.setText("Mo ta SP:");

        btnInsertProduct.setLabel("Them");
        btnInsertProduct.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnInsertProductActionPerformed(evt);
            }
        });

        btnEditProduct.setLabel("Sua");
        btnEditProduct.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnEditProductActionPerformed(evt);
            }
        });

        btnDeleteProduct.setLabel("Xoa");
        btnDeleteProduct.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnDeleteProductActionPerformed(evt);
            }
        });

        btnProductSearch.setLabel("Tim kiem");
        btnProductSearch.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnProductSearchActionPerformed(evt);
            }
        });

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

            },
            new String [] {
                "STT", "Ten", "Danh muc", "Gia", "Mo ta"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, false, true, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane2.setViewportView(tblProduct);

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(jPanel2Layout.createSequentialGroup()
                                .addGap(26, 26, 26)
                                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addComponent(jLabel5)
                                    .addComponent(jLabel4)
                                    .addComponent(jLabel3)
                                    .addComponent(jLabel2))
                                .addGap(43, 43, 43)
                                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(txtName)
                                    .addComponent(boxCategory, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addComponent(txtPrice)
                                    .addComponent(txtDescription, javax.swing.GroupLayout.DEFAULT_SIZE, 495, Short.MAX_VALUE)))
                            .addGroup(jPanel2Layout.createSequentialGroup()
                                .addGap(217, 217, 217)
                                .addComponent(btnInsertProduct, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(33, 33, 33)
                                .addComponent(btnEditProduct, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(39, 39, 39)
                                .addComponent(btnDeleteProduct, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(40, 40, 40)
                                .addComponent(btnProductSearch, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGap(0, 129, Short.MAX_VALUE))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane2)))
                .addContainerGap())
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel2Layout.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))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(boxCategory, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(txtPrice, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel5)
                    .addComponent(txtDescription, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(21, 21, 21)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(btnInsertProduct, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnEditProduct, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnDeleteProduct, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnProductSearch, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        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, false)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .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)
                .addGap(18, 18, 18)
                .addComponent(jPanel2, 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>//GEN-END:initComponents

    private void btnInsertCategoryActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnInsertCategoryActionPerformed
        // TODO add your handling code here:
        Category category = new Category(txtCategory.getText());
        categoryList.add(category);
        boxCategory.addItem(category.getCategoryName());
        txtCategory.setText("");
        tblModel.setRowCount(0);
        for (Category category1 : categoryList) {
            tblModel.addRow(new Object[]{tblModel.getRowCount() + 1, category1.getCategoryName()});
        }
        saveXML();
    }//GEN-LAST:event_btnInsertCategoryActionPerformed

    private void saveXML() {
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream("category.xml");
            String categoryList1 = "";
            for (Category category : categoryList) {
                categoryList1 += category.toXML();
            }
            String content = toXML(categoryList1);
            byte[] b = content.getBytes();
            fos.write(b);
        } catch (FileNotFoundException ex) {
            Logger.getLogger(ProductFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(ProductFrame.class.getName()).log(Level.SEVERE, null, ex);
        }finally{
            if(fos != null){
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(ProductFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }

    private String toXML(String categoryList) {
        return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
                + "\n"
                + "<category-list>\n"
                + categoryList
                + "</category-list>";
    }
    private void btnDeleteCategoryActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnDeleteCategoryActionPerformed
        // TODO add your handling code here:
        if (index < 0) {
            JOptionPane.showMessageDialog(rootPane, "Vui long lua chon danh muc muon xoa!!");
        } else {
            categoryList.remove(index);
            tblModel.setRowCount(0);
            for (Category category1 : categoryList) {
                tblModel.addRow(new Object[]{tblModel.getRowCount() + 1, category1.getCategoryName()});
            }
            txtCategory.setText("");
            index = -1;
        }
        saveXML();
    }//GEN-LAST:event_btnDeleteCategoryActionPerformed

    private void btnEditCategoryActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnEditCategoryActionPerformed
        // TODO add your handling code here:
        if (index < 0) {
            JOptionPane.showMessageDialog(rootPane, "Vui long lua chon danh muc muon sua!!");
        } else {
            categoryList.get(index).setCategoryName(txtCategory.getText());
            tblModel.setRowCount(0);
            for (Category category1 : categoryList) {
                tblModel.addRow(new Object[]{tblModel.getRowCount() + 1, category1.getCategoryName()});
            }
            txtCategory.setText("");
            index = -1;
        }
        saveXML();
    }//GEN-LAST:event_btnEditCategoryActionPerformed

    private void btnInsertProductActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnInsertProductActionPerformed
        // TODO add your handling code here:
        Product product = new Product(txtName.getText(), String.valueOf(boxCategory.getSelectedItem()),
                txtDescription.getText(), Float.parseFloat(txtPrice.getText()));
        productList.add(product);
        txtName.setText("");
        boxCategory.setSelectedIndex(0);
        txtPrice.setText("");
        txtDescription.setText("");
        tblModel1.setRowCount(0);
        for (Product product1 : productList) {
            tblModel1.addRow(new Object[]{tblModel1.getRowCount() + 1, product1.getName(),
                product1.getCategoryName(), product1.getPrice(), product1.getDescription()});
        }
        saveJSON();
    }//GEN-LAST:event_btnInsertProductActionPerformed
    
    private void saveJSON(){
        Gson gson = new Gson();
        String json = gson.toJson(productList);
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream("products.json");
            byte[] b = json.getBytes();
            fos.write(b);
        } catch (FileNotFoundException ex) {
            Logger.getLogger(ProductFrame.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(ProductFrame.class.getName()).log(Level.SEVERE, null, ex);
        }finally{
            if(fos != null){
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(ProductFrame.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
    }
    
    private void btnEditProductActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnEditProductActionPerformed
        // TODO add your handling code here:
        if (index1 < 0) {
            JOptionPane.showMessageDialog(rootPane, "Vui long lua chon san pham muon sua!!");
        } else {
            productList.get(index1).setName(txtName.getText());
            productList.get(index1).setCategoryName(String.valueOf(boxCategory.getSelectedItem()));
            productList.get(index1).setPrice(Float.parseFloat(txtPrice.getText()));
            productList.get(index1).setDescription(txtDescription.getText());
            tblModel1.setRowCount(0);
            for (Product product1 : productList) {
                tblModel1.addRow(new Object[]{tblModel1.getRowCount() + 1, product1.getName(),
                    product1.getCategoryName(), product1.getPrice(), product1.getDescription()});
            }
            txtName.setText("");
            boxCategory.setSelectedIndex(0);
            txtPrice.setText("");
            txtDescription.setText("");
            index1 = -1;
        }
        saveJSON();
    }//GEN-LAST:event_btnEditProductActionPerformed

    private void btnDeleteProductActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnDeleteProductActionPerformed
        // TODO add your handling code here:
        if (index1 < 0) {
            JOptionPane.showMessageDialog(rootPane, "Vui long lua chon san pham muon xoa!!");
        } else {
            productList.remove(index1);
            tblModel1.setRowCount(0);
            for (Product product1 : productList) {
                tblModel1.addRow(new Object[]{tblModel1.getRowCount() + 1, product1.getName(),
                    product1.getCategoryName(), product1.getPrice(), product1.getDescription()});
            }
            txtName.setText("");
            boxCategory.setSelectedIndex(0);
            txtPrice.setText("");
            txtDescription.setText("");
            index1 = -1;
        }
        saveJSON();
    }//GEN-LAST:event_btnDeleteProductActionPerformed

    private void btnProductSearchActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnProductSearchActionPerformed
        // TODO add your handling code here:
        String nameSearch = JOptionPane.showInputDialog("Ten san pham muon tim kiem:");
        try {
            if (nameSearch.isEmpty()) {
                tblModel1.setRowCount(0);
                for (Product product1 : productList) {
                    tblModel1.addRow(new Object[]{tblModel1.getRowCount() + 1, product1.getName(),
                        product1.getCategoryName(), product1.getPrice(), product1.getDescription()});
                }
            }
        } catch (Exception e) {
            return;
        }
        tblModel1.setRowCount(0);
        int check = 0;
        for (Product product1 : productList) {
            if (product1.getName().equalsIgnoreCase(nameSearch)) {
                tblModel1.addRow(new Object[]{tblModel1.getRowCount() + 1, product1.getName(),
                    product1.getCategoryName(), product1.getPrice(), product1.getDescription()});
                check++;
            }
        }
        if (check == 0) {
            JOptionPane.showMessageDialog(rootPane, "Khong tim thay san pham can tim kiem!!");
            tblModel1.setRowCount(0);
            for (Product product1 : productList) {
                tblModel1.addRow(new Object[]{tblModel1.getRowCount() + 1, product1.getName(),
                    product1.getCategoryName(), product1.getPrice(), product1.getDescription()});
            }
        }
    }//GEN-LAST:event_btnProductSearchActionPerformed

    /**
     * @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(ProductFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(ProductFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(ProductFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(ProductFrame.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 ProductFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JComboBox<String> boxCategory;
    private java.awt.Button btnDeleteCategory;
    private java.awt.Button btnDeleteProduct;
    private java.awt.Button btnEditCategory;
    private java.awt.Button btnEditProduct;
    private java.awt.Button btnInsertCategory;
    private java.awt.Button btnInsertProduct;
    private java.awt.Button btnProductSearch;
    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.JPanel jPanel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTable tblCategory;
    private javax.swing.JTable tblProduct;
    private javax.swing.JTextField txtCategory;
    private javax.swing.JTextField txtDescription;
    private javax.swing.JTextField txtName;
    private javax.swing.JTextField txtPrice;
    // End of variables declaration//GEN-END:variables
}


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