動態添加jtable到jpanel

我正在嘗試構建一個CRUD程序。現在，我嘗試從數據庫讀取數據並將其顯示在jtable中。所以每次我將創建一個新表並將其添加到jpanel。但是程序在更新時不顯示錶格。有人能幫我嗎？
package com.accsoftware.ui; 

import java.sql.Date; 
import java.util.List; 

import javax.swing.JTable; 

import com.accsoftware.common.Table1; 
import com.accsoftware.util.DataHandler; 


public class SearchAndDisplayPanel extends javax.swing.JPanel { 


    private static final long serialVersionUID = -9078860779973523031L; 

    public SearchAndDisplayPanel() { 
     initComponents(); 
    } 

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

     chooseTableButtonGroup = new javax.swing.ButtonGroup(); 
     jLabel1 = new javax.swing.JLabel(); 
     date = new com.toedter.calendar.JDateChooser(); 
     jLabel2 = new javax.swing.JLabel(); 
     date1 = new com.toedter.calendar.JDateChooser(); 
     displayPanel = new javax.swing.JPanel(); 
     generateReport = new javax.swing.JButton(); 
     Search = new javax.swing.JButton(); 
     chooseTablePanel = new javax.swing.JPanel(); 
     table1RadioButton = new javax.swing.JRadioButton(); 
     jRadioButton2 = new javax.swing.JRadioButton(); 

     jLabel1.setText("Start:"); 

     jLabel2.setText("End:"); 

     javax.swing.GroupLayout displayPanelLayout = new javax.swing.GroupLayout(displayPanel); 
     displayPanel.setLayout(displayPanelLayout); 
     displayPanelLayout.setHorizontalGroup(
      displayPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGap(0, 0, Short.MAX_VALUE) 
     ); 
     displayPanelLayout.setVerticalGroup(
      displayPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGap(0, 173, Short.MAX_VALUE) 
     ); 

     generateReport.setText("Generate Report"); 
     generateReport.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       generateReportActionPerformed(evt); 
      } 
     }); 

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

     chooseTableButtonGroup.add(table1RadioButton); 
     table1RadioButton.setText("Table1"); 

     chooseTableButtonGroup.add(jRadioButton2); 
     jRadioButton2.setText("Table2"); 

     javax.swing.GroupLayout chooseTablePanelLayout = new javax.swing.GroupLayout(chooseTablePanel); 
     chooseTablePanel.setLayout(chooseTablePanelLayout); 
     chooseTablePanelLayout.setHorizontalGroup(
      chooseTablePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(chooseTablePanelLayout.createSequentialGroup() 
       .addComponent(table1RadioButton) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 37, Short.MAX_VALUE) 
       .addComponent(jRadioButton2) 
       .addContainerGap()) 
     ); 
     chooseTablePanelLayout.setVerticalGroup(
      chooseTablePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(chooseTablePanelLayout.createSequentialGroup() 
       .addGroup(chooseTablePanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(table1RadioButton) 
        .addComponent(jRadioButton2)) 
       .addGap(0, 6, Short.MAX_VALUE)) 
     ); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this); 
     this.setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addContainerGap() 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addComponent(displayPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
        .addGroup(layout.createSequentialGroup() 
         .addComponent(jLabel1) 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
         .addComponent(date, javax.swing.GroupLayout.PREFERRED_SIZE, 149, javax.swing.GroupLayout.PREFERRED_SIZE) 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 79, Short.MAX_VALUE) 
         .addComponent(jLabel2) 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
         .addComponent(date1, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE) 
         .addGap(24, 24, 24)) 
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 
         .addComponent(chooseTablePanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
         .addComponent(generateReport) 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) 
         .addComponent(Search))) 
       .addContainerGap()) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addGap(36, 36, 36) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addComponent(jLabel2) 
        .addComponent(date1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(jLabel1) 
        .addComponent(date, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addGap(18, 18, 18) 
       .addComponent(displayPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
         .addComponent(generateReport) 
         .addComponent(Search, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE)) 
        .addComponent(chooseTablePanel, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
     ); 
    }// </editor-fold> 

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

    private void SearchActionPerformed(java.awt.event.ActionEvent evt) { 
     Date start = dateToString(date); 
     Date end = dateToString(date1); 
     String table = table1RadioButton.isSelected()?"Table1":"Table2"; 
     List result = DataHandler.readAll(table, start, end); 

     int col = table1RadioButton.isSelected()?7:10; 

     Object[][] data = new Object[result.size()][col]; 

     if(table.equalsIgnoreCase("Table1")){ 
      int id = 0; 
      for(Object element:result){ 
       Table1 table1 = (Table1) element; 
       data[id][0] = table1.getDate(); 
       data[id][1] = table1.getItem(); 
       data[id][2] = table1.getFee(); 
       data[id][3] = table1.getGst(); 
       data[id][4] = table1.getVehicle(); 
       data[id][5] = table1.getWages(); 
       data[id][6] = table1.getStationary(); 
       id++;   

      } 
      String[] columnNames = { "Date", "Reference/Item", "Cost", "GST", 
        "Vehicle", "Wages", "Stationary" }; 

      JTable displayTable = new JTable(data, columnNames); 
      this.displayPanel.add(displayTable); 
      this.displayPanel.revalidate(); 
      this.displayPanel.repaint();    
     } 
    } 

    @SuppressWarnings("deprecation") 
    private Date dateToString(com.toedter.calendar.JDateChooser date){ 
     return new Date(date.getDate().getYear(), 
       date.getDate().getMonth(), date.getDate().getDay()); 
    } 
    // Variables declaration - do not modify 
    private javax.swing.JButton Search; 
    private javax.swing.ButtonGroup chooseTableButtonGroup; 
    private javax.swing.JPanel chooseTablePanel; 
    private com.toedter.calendar.JDateChooser date; 
    private com.toedter.calendar.JDateChooser date1; 
    private javax.swing.JPanel displayPanel; 
    private javax.swing.JButton generateReport; 
    private javax.swing.JLabel jLabel1; 
    private javax.swing.JLabel jLabel2; 
    private javax.swing.JRadioButton table1RadioButton; 
    private javax.swing.JRadioButton jRadioButton2; 
    // End of variables declaration 
}
來源
2013-10-20 Alvin
您使用的是GroupLayout，它在添加組件時需要水平和垂直順序組。這種工作最好由UI構建者完成。
當應用程序初始化而不是添加多個表時創建一個JTable。當需要數據檢索時更新TableModel。使用可變的DefaultTableModel。
來源
2013-10-20 00:27:13 Reimeus
發佈一個[簡短自包含的可編譯示例]（http://sscce.org/），以便我們可以看到代碼的樣子 – Reimeus
我試圖將新的JTable添加到父面板包含的面板之一。然後向用戶顯示新表。 – Alvin
你使用'GroupLayout'，（想你可能會）讓我更新答案 - 嘆！ – Reimeus
動態添加jtable到jpanel

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