チェックボックスをオンにすると、JTableの内容でデータベースを更新します。

Question

それぞれの行のチェックボックスをクリックすると、データベースをJテーブルのセル値で更新します。ここに私のコードです。私は、J2EEのためだけの初心者ですので、解決策を詳しく説明してください

package Inhospmgmt; 

import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import javax.swing.JFrame; 

import java.awt.Toolkit; 
import java.awt.Color; 

import javax.swing.JLabel; 
import javax.swing.SwingConstants; 

import java.awt.Font; 
import java.awt.SystemColor; 
import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.SQLException; 

import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.JTextField; 
import javax.swing.JButton; 
import javax.swing.ImageIcon; 
import javax.swing.JSeparator; 
import javax.swing.JPanel; 
import javax.swing.RowSorter; 
import javax.swing.border.MatteBorder; 
import javax.swing.border.SoftBevelBorder; 
import javax.swing.border.BevelBorder; 
import javax.swing.table.DefaultTableModel; 
import javax.swing.table.TableModel; 
import javax.swing.table.TableRowSorter; 
import javax.swing.JCheckBox; 

public class investigation extends JFrame implements ActionListener 
{ 

    /** 
    * 
    */ 
    private static final long serialVersionUID = 2930370058483683162L; 
    static JFrame fm1=new JFrame(); 
    int cnt = 0, r=0,c=0; 
    String columns[]={"SNO", "INVESTIGATION", "PRICE(Rs.)", "SELECTION"}; 
    String data[][]=new String[cnt][3]; 
    private JTextField textField; 
    private JTextField textField_1; 
    private JTextField textField_2; 
    private JTextField textField_3; 
    private JTextField textField_4; 
    private JTextField textField_5; 
    private JTextField textField_6; 
    static JTable table=new JTable(); 
    static JScrollPane jsp1; 
    DefaultTableModel tabModel ; 

    investigation() 
    { 
     fm1.getContentPane().setBackground(Color.WHITE); 
     fm1.setTitle("Social Care Hospital/Investigation"); 
     fm1.setIconImage(Toolkit.getDefaultToolkit().getImage(investigation.class.getResource("/Inhospmgmt/img/icpic.jpg"))); 
     fm1.getContentPane().setLayout(null); 


     JLabel lblInvestigation = new JLabel("Investigations"); 
     lblInvestigation.setForeground(SystemColor.textHighlight); 
     lblInvestigation.setFont(new Font("Times New Roman", Font.BOLD, 30)); 
     lblInvestigation.setHorizontalAlignment(SwingConstants.CENTER); 
     lblInvestigation.setBounds(557, 23, 229, 46); 
     fm1.getContentPane().add(lblInvestigation); 

     JLabel label = new JLabel("PID No."); 
     label.setHorizontalAlignment(SwingConstants.CENTER); 
     label.setForeground(SystemColor.textHighlight); 
     label.setFont(new Font("Tahoma", Font.BOLD, 20)); 
     label.setBounds(10, 83, 79, 28); 
     fm1.getContentPane().add(label); 

     textField = new JTextField(); 
     textField.setColumns(10); 
     textField.setBackground(Color.WHITE); 
     textField.setBounds(114, 78, 114, 33); 
     fm1.getContentPane().add(textField); 

     JButton button = new JButton(""); 
     button.setIcon(new ImageIcon(investigation.class.getResource("/Inhospmgmt/img/unnamed.png"))); 
     button.setFocusPainted(false); 
     button.setContentAreaFilled(false); 
     button.setBackground(Color.WHITE); 
     button.setBounds(227, 78, 33, 33); 
     fm1.getContentPane().add(button); 

     JLabel label_1 = new JLabel("Patient Name :"); 
     label_1.setFont(new Font("Times New Roman", Font.PLAIN, 15)); 
     label_1.setBounds(10, 144, 99, 22); 
     fm1.getContentPane().add(label_1); 

     textField_1 = new JTextField(); 
     textField_1.setEnabled(false); 
     textField_1.setDisabledTextColor(Color.BLUE); 
     textField_1.setColumns(10); 
     textField_1.setBounds(137, 145, 226, 22); 
     fm1.getContentPane().add(textField_1); 

     JLabel label_2 = new JLabel("Patient Age :"); 
     label_2.setFont(new Font("Times New Roman", Font.PLAIN, 15)); 
     label_2.setBounds(411, 144, 90, 22); 
     fm1.getContentPane().add(label_2); 

     textField_2 = new JTextField(); 
     textField_2.setEnabled(false); 
     textField_2.setDisabledTextColor(Color.BLUE); 
     textField_2.setColumns(10); 
     textField_2.setBounds(499, 145, 79, 22); 
     fm1.getContentPane().add(textField_2); 

     JLabel lblDepartment = new JLabel("Department :"); 
     lblDepartment.setFont(new Font("Times New Roman", Font.PLAIN, 15)); 
     lblDepartment.setBounds(633, 144, 99, 22); 
     fm1.getContentPane().add(lblDepartment); 

     textField_3 = new JTextField(); 
     textField_3.setEnabled(false); 
     textField_3.setDisabledTextColor(Color.BLUE); 
     textField_3.setColumns(10); 
     textField_3.setBounds(725, 145, 249, 22); 
     fm1.getContentPane().add(textField_3); 

     JLabel lblWard = new JLabel("Ward :"); 
     lblWard.setFont(new Font("Times New Roman", Font.PLAIN, 15)); 
     lblWard.setBounds(1018, 144, 90, 22); 
     fm1.getContentPane().add(lblWard); 

     textField_4 = new JTextField(); 
     textField_4.setEnabled(false); 
     textField_4.setDisabledTextColor(Color.BLUE); 
     textField_4.setColumns(10); 
     textField_4.setBounds(1082, 145, 165, 22); 
     fm1.getContentPane().add(textField_4); 

     JLabel lblBedNo = new JLabel("Bed No :"); 
     lblBedNo.setFont(new Font("Times New Roman", Font.PLAIN, 15)); 
     lblBedNo.setBounds(411, 192, 69, 22); 
     fm1.getContentPane().add(lblBedNo); 

     textField_5 = new JTextField(); 
     textField_5.setEnabled(false); 
     textField_5.setDisabledTextColor(Color.BLUE); 
     textField_5.setColumns(10); 
     textField_5.setBounds(499, 193, 79, 22); 
     fm1.getContentPane().add(textField_5); 

     JLabel lblConsultingDoctor = new JLabel("Consulting Doctor :"); 
     lblConsultingDoctor.setFont(new Font("Times New Roman", Font.PLAIN, 15)); 
     lblConsultingDoctor.setBounds(10, 192, 143, 22); 
     fm1.getContentPane().add(lblConsultingDoctor); 

     textField_6 = new JTextField(); 
     textField_6.setEnabled(false); 
     textField_6.setDisabledTextColor(Color.BLUE); 
     textField_6.setColumns(10); 
     textField_6.setBounds(138, 193, 226, 22); 
     fm1.getContentPane().add(textField_6); 


     JSeparator separator = new JSeparator(); 
     separator.setBounds(0, 243, 1362, 2); 
     fm1.getContentPane().add(separator);  

     table = new JTable(); 
     Connection con = MyConnection.connect(); 
     try 
     { 
      String s ="SELECT SNo,INVESTIGATION,PRICE FROM investigation"; 
      PreparedStatement p =con.prepareStatement(s); 
      ResultSet rs = p.executeQuery(); 
      rs.last(); 
      cnt = rs.getRow(); 
      rs.beforeFirst(); 
      String data[][]=new String[cnt][3]; 

      while(rs.next()) 
      { 
       data[r][c] = String.valueOf(rs.getInt("SNo")); ++c; 
       data[r][c] = rs.getString("INVESTIGATION");++c; 
       data[r][c] = String.valueOf(rs.getInt("PRICE")); ++c; 


       r=r+1; 
       c=0; 
      } 


      table.setModel(new DefaultTableModel(data,columns) 
      { 
       public boolean isCellEditable(int row, int column){ 
         if(column==0 || column==1 || column==2) 
         { 
          return false; 
         } 
         return true; 
        } 

       Class[ ] type=new Class[]{java.lang.String.class , java.lang.String.class ,java.lang.String.class, java.lang.Boolean.class} ; 

      public Class getColumnClass (int columnIndex) 
      { 
       return type [columnIndex] ; 
        } 

      }) ; 


      setDefaultLookAndFeelDecorated(true); 
      table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
      table.setBackground(Color.white); 
      table.setGridColor(Color.magenta); 
      table.getColumnModel().getColumn(0).setPreferredWidth(80); 
      table.getColumnModel().getColumn(1).setPreferredWidth(200); 
      table.getColumnModel().getColumn(2).setPreferredWidth(100); 
      table.getTableHeader().setBackground(Color.pink); 
      table.setRowSelectionAllowed(true); 
      table.getTableHeader().setFont(new Font("SansSerif",Font.BOLD, 15)); 

      jsp1 = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); 
      jsp1.setBackground(Color.white); 
      jsp1.setViewportBorder(new MatteBorder(3, 3, 3, 3, (Color) new Color(0, 0, 0))); 
      jsp1.getViewport().setBackground(table.getBackground()); 
      jsp1.setBounds(526, 404, 485, 162); 
      fm1.getContentPane().add(jsp1); 

      fm1.setVisible(true); 
      fm1.setExtendedState(JFrame.MAXIMIZED_BOTH); 

     } 
     catch(SQLException e) 
     { 
      e.printStackTrace(); 
     } 
     finally 
     { 
      try { 
       con.close(); 
       } 
      catch (SQLException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 

    } 



    public static void main(String[] args) 
    { 
     new investigation() ;  

    } 

    @Override 
    public void actionPerformed(ActionEvent e) { 
     // TODO Auto-generated method stub 

    } 
} 

Answer 1

1. JTableのTableModelにTableModelListenerを追加します。

2. チェックボックスを含む列に対してイベントが生成されると、値がBoolean.TRUEであることを確認します。次に、データベースにデータをコピーするために必要なSQLを生成します。

あなたがチェックアウトすることができます：TableModelListener使用して実施例についてTableModelListener and multiple column validation。