在JTable中顯示來自mysql的數據

如何將我的數據從mysql表中存入我的JTable？我希望能夠將UPDATE，DELETE和ADD操作放入mysql表中。這應該是我的餐廳應用程序，並且我希望用戶在JTable中看到餐館庫存並單擊表格按鈕時，它會打開一個新框架，用戶可以在該框架中添加，刪除或從庫存中將產品從該表格中取出。一旦產品被添加或從表格消息中刪除，mysql表將自動更新將會很酷。在JTable中顯示來自mysql的數據

package project_bar; 


import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import javax.swing.JOptionPane; 
import java.awt.*; 
import java.sql.*; 
import java.util.*; 
import javax.swing.*; 
import javax.swing.table.*; 


public class MainMenu extends javax.swing.JFrame { 
Connection conn = new DBConnection().connect(); 
PreparedStatement pst = null; 
ResultSet rs = null; 
    public MainMenu() { 
     initComponents(); 

    } 


    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jPanel1 = new javax.swing.JPanel(); 
     logout_bt = new javax.swing.JButton(); 
     jLabel1 = new javax.swing.JLabel(); 
     table1_bt = new javax.swing.JButton(); 
     table1_lb = new javax.swing.JLabel(); 
     table2_lb = new javax.swing.JLabel(); 
     table2_bt = new javax.swing.JButton(); 
     table3_lb = new javax.swing.JLabel(); 
     table3_bt = new javax.swing.JButton(); 
     Bauturi_lb = new javax.swing.JLabel(); 
     jScrollPane1 = new javax.swing.JScrollPane(); 
     Table_stock = new javax.swing.JTable(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE); 

     logout_bt.setText("LOGOUT"); 
     logout_bt.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       logout_btActionPerformed(evt); 
      } 
     }); 

     jLabel1.setFont(new java.awt.Font("Verdana", 3, 18)); // NOI18N 
     jLabel1.setText("Tamas Vlad Restaurant"); 

     table1_bt.setForeground(new java.awt.Color(204, 204, 204)); 
     table1_bt.setIcon(new javax.swing.ImageIcon(getClass().getResource("/round_table-128.png"))); // NOI18N 
     table1_bt.setText("TABLE 1"); 
     table1_bt.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       table1_btActionPerformed(evt); 
      } 
     }); 

     table1_lb.setText("TABLE 1"); 

     table2_lb.setText("Table 2"); 

     table2_bt.setForeground(new java.awt.Color(204, 204, 204)); 
     table2_bt.setIcon(new javax.swing.ImageIcon(getClass().getResource("/round_table-128.png"))); // NOI18N 
     table2_bt.setText("TABLE 1"); 
     table2_bt.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       table2_btActionPerformed(evt); 
      } 
     }); 

     table3_lb.setText("Table 3"); 

     table3_bt.setForeground(new java.awt.Color(204, 204, 204)); 
     table3_bt.setIcon(new javax.swing.ImageIcon(getClass().getResource("/round_table-128.png"))); // NOI18N 
     table3_bt.setText("TABLE 1"); 
     table3_bt.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       table3_btActionPerformed(evt); 
      } 
     }); 

     Bauturi_lb.setFont(new java.awt.Font("Vani", 3, 24)); // NOI18N 
     Bauturi_lb.setText("DRINKS ON STOCK"); 

     Table_stock.setModel(new javax.swing.table.DefaultTableModel(
      new Object [][] { 
       {null, null, null}, 
       {null, null, null}, 
       {null, null, null}, 
       {null, null, null} 
      }, 
      new String [] { 
       "Name", "Quantity", "Price" 
      } 
     ) { 
      boolean[] canEdit = new boolean [] { 
       false, false, false 
      }; 

      public boolean isCellEditable(int rowIndex, int columnIndex) { 
       return canEdit [columnIndex]; 
      } 
     }); 
     Table_stock.setCellSelectionEnabled(true); 
     Table_stock.addAncestorListener(new javax.swing.event.AncestorListener() { 
      public void ancestorMoved(javax.swing.event.AncestorEvent evt) { 
      } 
      public void ancestorAdded(javax.swing.event.AncestorEvent evt) { 
       Table_stockAncestorAdded(evt); 
      } 
      public void ancestorRemoved(javax.swing.event.AncestorEvent evt) { 
      } 
     }); 
     jScrollPane1.setViewportView(Table_stock); 
     Table_stock.getColumnModel().getSelectionModel().setSelectionMode(javax.swing.ListSelectionModel.SINGLE_INTERVAL_SELECTION); 

     javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); 
     jPanel1.setLayout(jPanel1Layout); 
     jPanel1Layout.setHorizontalGroup(
      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel1Layout.createSequentialGroup() 
       .addContainerGap() 
       .addComponent(logout_bt) 
       .addGap(334, 334, 334) 
       .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 243, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addGap(0, 599, Short.MAX_VALUE)) 
      .addGroup(jPanel1Layout.createSequentialGroup() 
       .addGap(41, 41, 41) 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) 
        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE) 
        .addComponent(Bauturi_lb, javax.swing.GroupLayout.DEFAULT_SIZE, 262, Short.MAX_VALUE)) 
       .addGap(138, 138, 138) 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addComponent(table1_bt, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(table1_lb, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addGap(123, 123, 123) 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addComponent(table2_bt, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE) 
        .addComponent(table2_lb, javax.swing.GroupLayout.PREFERRED_SIZE, 47, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addGap(135, 135, 135) 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addComponent(table3_lb) 
        .addComponent(table3_bt, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
     ); 
     jPanel1Layout.setVerticalGroup(
      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(jPanel1Layout.createSequentialGroup() 
       .addContainerGap() 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(jLabel1) 
        .addComponent(logout_bt)) 
       .addGap(68, 68, 68) 
       .addComponent(Bauturi_lb, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
        .addGroup(jPanel1Layout.createSequentialGroup() 
         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 124, Short.MAX_VALUE) 
         .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
          .addComponent(table1_lb) 
          .addComponent(table2_lb) 
          .addComponent(table3_lb)) 
         .addGap(24, 24, 24) 
         .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
          .addComponent(table1_bt, javax.swing.GroupLayout.PREFERRED_SIZE, 54, javax.swing.GroupLayout.PREFERRED_SIZE) 
          .addComponent(table2_bt, javax.swing.GroupLayout.PREFERRED_SIZE, 54, javax.swing.GroupLayout.PREFERRED_SIZE) 
          .addComponent(table3_bt, javax.swing.GroupLayout.PREFERRED_SIZE, 54, javax.swing.GroupLayout.PREFERRED_SIZE))) 
        .addGroup(jPanel1Layout.createSequentialGroup() 
         .addGap(38, 38, 38) 
         .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE))) 
       .addGap(556, 556, 556)) 
     ); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addContainerGap() 
       .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(19, Short.MAX_VALUE)) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addContainerGap() 
       .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
     ); 

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

    private void table1_btActionPerformed(java.awt.event.ActionEvent evt) {           

     setDefaultCloseOperation(DISPOSE_ON_CLOSE); 
     new Table1().show(); 

    }           

    private void logout_btActionPerformed(java.awt.event.ActionEvent evt) {           
     this.dispose(); 
      new Login(null,true).show(); 

    }           

    private void table2_btActionPerformed(java.awt.event.ActionEvent evt) {           
     // TODO add your handling code here: 
     setDefaultCloseOperation(DISPOSE_ON_CLOSE); 
     new Table1().show(); 
    }           

    private void table3_btActionPerformed(java.awt.event.ActionEvent evt) {           
     // TODO add your handling code here: 
     setDefaultCloseOperation(DISPOSE_ON_CLOSE); 
     new Table1().show(); 

    }           

    private void Table_stockAncestorAdded(javax.swing.event.AncestorEvent evt) {           
     // TODO add your handling code here: 

    }           



    public static void main(String args[]) { 

     java.awt.EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       new MainMenu().setVisible(true); 
      } 
     }); 
    } 

    // Variables declaration - do not modify      
    private javax.swing.JLabel Bauturi_lb; 
    private javax.swing.JTable Table_stock; 
    private javax.swing.JLabel jLabel1; 
    private javax.swing.JPanel jPanel1; 
    private javax.swing.JScrollPane jScrollPane1; 
    private javax.swing.JButton logout_bt; 
    private javax.swing.JButton table1_bt; 
    private javax.swing.JLabel table1_lb; 
    private javax.swing.JButton table2_bt; 
    private javax.swing.JLabel table2_lb; 
    private javax.swing.JButton table3_bt; 
    private javax.swing.JLabel table3_lb; 
    // End of variables declaration     
}

來源

2015-01-03 Vlad Tamas

執行SQL查詢，從數據庫'ResultSet'中取出行信息，將數據包裝在POJO中並將其添加到表模型中。通常使用基於'AbstractTableModel'（恕我直言）的自定義'TableModel'更好，因爲它可以讓您更好地控制數據的管理方式。請參見[JDBC數據庫訪問]（http://docs.oracle.com/javase/tutorial/jdbc/）和[如何使用表]（http://docs.oracle.com/javase/tutorial/uiswing/components/ table.html） – MadProgrammer

我用@MadProgrammer所提到的完成了同樣的工作，並做了一些調整以適合我的需求。爲什麼你想在這種情況下使用自動更新？這不像廚房開始製作漢堡，然後把漢堡放進去製作披薩。您的網絡帶寬也會降低您需要處理的更多查詢，尤其是自動更新 –

自動更新僅適用於庫存部分..所以如果您沒有更多可樂，請留下警報messaje會彈出 –

DbConnection conn = new DbConnection(); 
    Connection connection = conn.getConnection(); 
    Statement st; 
    Vector data = new Vector(); 
    try { 
     st = connection.createStatement(); 
     ResultSet res = st.executeQuery("SELECT col_name FROM table_name"); 
     ResultSetMetaData metaData = res.getMetaData(); 
     int columns = metaData.getColumnCount(); 
     while (res.next()) { 
      Vector row = new Vector(columns); 
      for (int i = 1; i <= columns; i++) { 
      row.addElement(res.getObject(i)); 
      } 
      data.addElement(row); 
     } 
    } catch (SQLException e) { 
     e.printStackTrace(); 
    } 
    Vector columnNames = new Vector(); 
    columnNames.addElement("col_1"); 
    columnNames.addElement("col_name_n"); 
    table = new JTable(data,columnNames);

您可以使用類似的東西上面的代碼。步驟： 1.You使用數據庫連接2.You執行查詢 3.Store從數據庫中的數據進載體 4.Create的JTable與存儲載體中的數據

來源

2015-01-03 13:27:46

您並未關閉資源，將您的連接和其他關聯資源打開，這可能會影響數據庫的性能。每次查詢時都不需要創建新的JTable，只需創建或更新現有模型即可。這個例子會回來並困擾我們。 – MadProgrammer

在JTable中顯示來自mysql的數據

回答

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