https://gokisoft.com/examination-kiem-tra-45-phut-lap-trinh-java-nang-cao.html

B1. Xay dung database

create table customer (
	id int primary key auto_increment,
	fullname varchar(50) not null,
	email varchar(150) not null,
	phone_number varchar(20),
	birthday date,
	address varchar(200),
	password varchar(32)
)

B2. Tai thu vien mysql jdbc driver maven
B3. Phat trien chuc nang cua du an
- Mapping tables <-> model (class object)
- Cau hinh ket noi database
- DAO -> Modify (lay danh sach khach hang, them, sua, xoa)
- GUI

#CustomerModify.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.lesson11.bt2386;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Diep.Tran
 */
public class CustomerModify {
    public static List<Customer> getCustomerList(String s) {
        List<Customer> dataList = new ArrayList<>();
        
        Connection conn = null;
        PreparedStatement statement = null;
        
        try {
            conn = DriverManager.getConnection(Config.DB_URL, Config.USERNAME, Config.PASSWORD);
            
            String sql = "select * from customer";
            if(s != null && !s.isEmpty()) {
                sql += " where fullname like ?";
            }
            statement = conn.prepareStatement(sql);
            if(s != null && !s.isEmpty()) {
                statement.setString(1, s);
            }
            ResultSet resultSet = statement.executeQuery();
            
            while(resultSet.next()) {
                Customer customer = new Customer(
                        resultSet.getInt("id"),
                        resultSet.getString("fullname"),
                        resultSet.getString("email"),
                        resultSet.getString("phone_number"),
                        resultSet.getString("birthday"),
                        resultSet.getString("address"),
                        resultSet.getString("password")
                );
                dataList.add(customer);
            }
        } catch (SQLException ex) {
            Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if(statement != null) {
                try {
                    statement.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            if(conn != null) {
                try {
                    conn.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
        
        return dataList;
    }
    
    public static void insert(Customer customer) {
        Connection conn = null;
        PreparedStatement statement = null;
        
        try {
            conn = DriverManager.getConnection(Config.DB_URL, Config.USERNAME, Config.PASSWORD);
            
            String sql = "insert into customer(fullname, email, phone_number, birthday, address, password) "
                    + "values (?, ?, ?, ?, ?, ?)";
            statement = conn.prepareStatement(sql);
            statement.setString(1, customer.getFullname());
            statement.setString(2, customer.getEmail());
            statement.setString(3, customer.getPhoneNumber());
            statement.setString(4, customer.getBirthday());
            statement.setString(5, customer.getAddress());
            statement.setString(6, customer.getPassword());
            
            statement.execute();
        } catch (SQLException ex) {
            Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if(statement != null) {
                try {
                    statement.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            if(conn != null) {
                try {
                    conn.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
    
    public static void update(Customer customer) {
        Connection conn = null;
        PreparedStatement statement = null;
        
        try {
            conn = DriverManager.getConnection(Config.DB_URL, Config.USERNAME, Config.PASSWORD);
            
            String sql = "update customer set fullname = ?, email = ?, phone_number = ?, birthday = ?, address = ?, password = ? where id = ?";
            statement = conn.prepareStatement(sql);
            statement.setString(1, customer.getFullname());
            statement.setString(2, customer.getEmail());
            statement.setString(3, customer.getPhoneNumber());
            statement.setString(4, customer.getBirthday());
            statement.setString(5, customer.getAddress());
            statement.setString(6, customer.getPassword());
            statement.setInt(7, customer.getId());
            
            statement.execute();
        } catch (SQLException ex) {
            Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if(statement != null) {
                try {
                    statement.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            if(conn != null) {
                try {
                    conn.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
    
    public static void delete(int id) {
        Connection conn = null;
        PreparedStatement statement = null;
        
        try {
            conn = DriverManager.getConnection(Config.DB_URL, Config.USERNAME, Config.PASSWORD);
            
            String sql = "delete from customer where id = ?";
            statement = conn.prepareStatement(sql);
            statement.setInt(1, id);
            
            statement.execute();
        } catch (SQLException ex) {
            Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if(statement != null) {
                try {
                    statement.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            if(conn != null) {
                try {
                    conn.close();
                } catch (SQLException ex) {
                    Logger.getLogger(CustomerModify.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
}

#CustomerFrame.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.lesson11.bt2386;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.List;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author Diep.Tran
 */
public class CustomerFrame extends javax.swing.JFrame {

    DefaultTableModel tableModel;
    List<Customer> dataList;
    int currentPos = -1;

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

        tableModel = (DefaultTableModel) customerTable.getModel();
        dataList = CustomerModify.getCustomerList(null);

        showData();

        customerTable.addMouseListener(new MouseListener() {
            @Override
            public void mouseClicked(MouseEvent e) {
                currentPos = customerTable.getSelectedRow();

                fullnameTxt.setText(dataList.get(currentPos).getFullname());
                emailTxt.setText(dataList.get(currentPos).getEmail());
                phoneTxt.setText(dataList.get(currentPos).getPhoneNumber());
                birthdayTxt.setText(dataList.get(currentPos).getBirthday());
                addressTxt.setText(dataList.get(currentPos).getAddress());
            }

            @Override
            public void mousePressed(MouseEvent e) {
            }

            @Override
            public void mouseReleased(MouseEvent e) {
            }

            @Override
            public void mouseEntered(MouseEvent e) {
            }

            @Override
            public void mouseExited(MouseEvent e) {
            }
        });
    }

    private void showData() {
        tableModel.setRowCount(0);
        for (Customer customer : dataList) {
            tableModel.addRow(new Object[]{
                tableModel.getRowCount() + 1,
                customer.getFullname(),
                customer.getEmail(),
                customer.getPhoneNumber(),
                customer.getBirthday(),
                customer.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">//GEN-BEGIN:initComponents
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        fullnameTxt = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        emailTxt = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        phoneTxt = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        birthdayTxt = new javax.swing.JTextField();
        jLabel5 = new javax.swing.JLabel();
        addressTxt = new javax.swing.JTextField();
        jLabel6 = new javax.swing.JLabel();
        pwdTxt = new javax.swing.JTextField();
        saveBtn = new javax.swing.JButton();
        delBtn = new javax.swing.JButton();
        searchBtn = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        customerTable = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("CHỨC NĂNG QUẢN LÝ THÔNG TIN KHÁCH HÀNG");

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("NHẬP THÔNG TIN KHÁCH HÀNG"));

        jLabel1.setText("Ten KH:");

        jLabel2.setText("Email:");

        jLabel3.setText("Số Điện Thoại:");

        jLabel4.setText("Ngày Sinh:");

        jLabel5.setText("Địa Chị:");

        jLabel6.setText("Mật Khẩu:");

        saveBtn.setText("Lưu");
        saveBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                saveBtnActionPerformed(evt);
            }
        });

        delBtn.setText("Xoá");
        delBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                delBtnActionPerformed(evt);
            }
        });

        searchBtn.setText("Tìm Kiếm");
        searchBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                searchBtnActionPerformed(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(14, 14, 14)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel6)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(pwdTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel5)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(addressTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel4)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(birthdayTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel3)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(phoneTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel2)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(emailTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                        .addComponent(jLabel1)
                        .addGap(74, 74, 74)
                        .addComponent(fullnameTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 337, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGap(32, 32, 32)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(saveBtn, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(delBtn, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(searchBtn, javax.swing.GroupLayout.DEFAULT_SIZE, 106, Short.MAX_VALUE))
                .addContainerGap(16, 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(fullnameTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(saveBtn))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(emailTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(delBtn))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(phoneTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(searchBtn))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(birthdayTxt, 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(jLabel5)
                    .addComponent(addressTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(21, 21, 21)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel6)
                    .addComponent(pwdTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

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

            },
            new String [] {
                "STT", "Họ Tên", "Email", "SĐT", "Ngày Sinh", "Địa Chỉ"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false, false, false, false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(customerTable);
        if (customerTable.getColumnModel().getColumnCount() > 0) {
            customerTable.getColumnModel().getColumn(0).setResizable(false);
            customerTable.getColumnModel().getColumn(1).setResizable(false);
            customerTable.getColumnModel().getColumn(2).setResizable(false);
            customerTable.getColumnModel().getColumn(3).setResizable(false);
            customerTable.getColumnModel().getColumn(4).setResizable(false);
            customerTable.getColumnModel().getColumn(5).setResizable(false);
        }

        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, 163, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void saveBtnActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_saveBtnActionPerformed
        // TODO add your handling code here:
        if (currentPos >= 0) {
            dataList.get(currentPos).setFullname(fullnameTxt.getText());
            dataList.get(currentPos).setEmail(emailTxt.getText());
            dataList.get(currentPos).setPhoneNumber(phoneTxt.getText());
            dataList.get(currentPos).setBirthday(birthdayTxt.getText());
            dataList.get(currentPos).setAddress(addressTxt.getText());
            dataList.get(currentPos).setPassword(pwdTxt.getText());
            
            CustomerModify.update(dataList.get(currentPos));
            currentPos = -1;
        } else {
            Customer customer = new Customer(
                    0,
                    fullnameTxt.getText(),
                    emailTxt.getText(),
                    phoneTxt.getText(),
                    birthdayTxt.getText(),
                    addressTxt.getText(),
                    pwdTxt.getText()
            );
            CustomerModify.insert(customer);
            dataList = CustomerModify.getCustomerList(null);
        }
        showData();

        fullnameTxt.setText("");
        emailTxt.setText("");
        phoneTxt.setText("");
        birthdayTxt.setText("");
        addressTxt.setText("");
        pwdTxt.setText("");
    }//GEN-LAST:event_saveBtnActionPerformed

    private void delBtnActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_delBtnActionPerformed
        // TODO add your handling code here:
        if(currentPos == -1) {
            JOptionPane.showMessageDialog(rootPane, "Chua chon khach hang can xoa, vui long kiem tra lai");
            return;
        }
        int option = JOptionPane.showConfirmDialog(rootPane, "Ban chac chan muon xoa khac hang nay khong?");
        if(option == 0) {
            CustomerModify.delete(dataList.get(currentPos).getId());
            dataList.remove(currentPos);
            currentPos = -1;
            showData();
        }

        fullnameTxt.setText("");
        emailTxt.setText("");
        phoneTxt.setText("");
        birthdayTxt.setText("");
        addressTxt.setText("");
        pwdTxt.setText("");
    }//GEN-LAST:event_delBtnActionPerformed

    private void searchBtnActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_searchBtnActionPerformed
        // TODO add your handling code here:
        String s = JOptionPane.showInputDialog("Nhap ten khach hang can tim kiem");
        if(!s.isEmpty()) {
            s = "%"+s+"%";
        }
        dataList = CustomerModify.getCustomerList(s);
        showData();
    }//GEN-LAST:event_searchBtnActionPerformed

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

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JTextField addressTxt;
    private javax.swing.JTextField birthdayTxt;
    private javax.swing.JTable customerTable;
    private javax.swing.JButton delBtn;
    private javax.swing.JTextField emailTxt;
    private javax.swing.JTextField fullnameTxt;
    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.JLabel jLabel6;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextField phoneTxt;
    private javax.swing.JTextField pwdTxt;
    private javax.swing.JButton saveBtn;
    private javax.swing.JButton searchBtn;
    // End of variables declaration//GEN-END:variables
}

#Customer.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.lesson11.bt2386;

/**
 *
 * @author Diep.Tran
 */
public class Customer {
    int id;
    String fullname, email, phoneNumber, birthday, address, password;

    public Customer() {
    }

    public Customer(int id, String fullname, String email, String phoneNumber, String birthday, String address, String password) {
        this.id = id;
        this.fullname = fullname;
        this.email = email;
        this.phoneNumber = phoneNumber;
        this.birthday = birthday;
        this.address = address;
        this.password = password;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getFullname() {
        return fullname;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public String getBirthday() {
        return birthday;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    public String getAddress() {
        return address;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "Customer{" + "id=" + id + ", fullname=" + fullname + ", email=" + email + ", phoneNumber=" + phoneNumber + ", birthday=" + birthday + ", address=" + address + ", password=" + password + '}';
    }
}

#Config.java

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package java2.lesson11.bt2386;

/**
 *
 * @author Diep.Tran
 */
public interface Config {
    String DB_URL = "jdbc:mysql://localhost:3306/C2010G";
    String USERNAME = "root";
    String PASSWORD = "";
}

Tham khảo MD5

public String MD5(String md5) {
   try {
        java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
        byte[] array = md.digest(md5.getBytes());
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < array.length; ++i) {
          sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(1,3));
       }
        return sb.toString();
    } catch (java.security.NoSuchAlgorithmException e) {
    }
    return null;
}