从Oracle表中自动向JTable添加数组列表

Question

当我按下按钮时，如何自动添加行。我正在使用validate(),repaint(),fireTableDataChanged()和fireTableStructureChanged()，但它没有解决我的问题。我的数据在数组列表中并插入到表中。这里是我的代码：

JTable table = new JTable(); 
DefaultTableModel model = new DefaultTableModel(); 
model.fireTableDataChanged(); 
table.repaint(); 
JScrollPane scrollPane = new JScrollPane(table); 
try { 
    orclConn.statement = orclConn.getConnection().createStatement(); 
    orclConn.resultset = orclConn.statement.executeQuery(
    "SELECT JOR,DANA,NRXYJOR FROM froshtnykalayhatw WHERE dt = '"+d+"' "); 

    while (orclConn.resultset.next()) { 
     //jlFroshraw is array list 
     jlFroshraw.add(new IydaShow(orclConn.resultset.getString(1), orclConn.resultset.getInt("dana"), orclConn.resultset.getInt("nrxyjor"))); 
    } 
} catch (Exception df) { 
    df.printStackTrace(); 
} 


table.setModel(model); 
model.setColumnIdentifiers(new String[]{"dd", "nn", "mm"}); 

for (IydaShow p : jlFroshraw) { 
    model.addRow(new Object[]{p.jor, p.chandJor, p.nrxyfroshraw}); 
} 

pnl.add(scrollPane, BorderLayout.CENTER); 

Answer 1

坦率地说，有没有足够的代码来充分演绎出一个完整的答案

JTable table = new JTable(); 
DefaultTableModel model = new DefaultTableModel(); 
// This is pointless as the model isn't actually attached to anything 
model.fireTableDataChanged(); 
// This is pointless as the table hasn't been added to anything 
table.repaint(); 
JScrollPane scrollPane = new JScrollPane(table); 
try { 
    orclConn.statement = orclConn.getConnection().createStatement(); 
    orclConn.resultset = orclConn.statement.executeQuery(
    "SELECT JOR,DANA,NRXYJOR FROM froshtnykalayhatw WHERE dt = '"+d+"' "); 

    while (orclConn.resultset.next()) { 
     //jlFroshraw is array list 
     // This looks dangrous to me, as I can't see where it's been created 
     // or if it's been cleared. 
     // This could mean that all previous queries are still contained 
     // with in it... 
     jlFroshraw.add(new IydaShow(orclConn.resultset.getString(1), orclConn.resultset.getInt("dana"), orclConn.resultset.getInt("nrxyjor"))); 
    } 
} catch (Exception df) { 
    df.printStackTrace(); 
} 

// This is actually okay 
table.setModel(model); 
model.setColumnIdentifiers(new String[]{"dd", "nn", "mm"}); 

// Read the previous statement about jlFroshraw list 
for (IydaShow p : jlFroshraw) { 
    model.addRow(new Object[]{p.jor, p.chandJor, p.nrxyfroshraw}); 
} 

pnl.add(scrollPane, BorderLayout.CENTER); 

更新与工作示例

import java.awt.BorderLayout; 
import java.awt.Dimension; 
import java.awt.EventQueue; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.ArrayList; 
import java.util.Date; 
import java.util.List; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.UIManager; 
import javax.swing.UnsupportedLookAndFeelException; 
import javax.swing.table.DefaultTableModel; 

public class TestTableLoad { 

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

    public TestTableLoad() { 
     EventQueue.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       try { 
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
       } catch (ClassNotFoundException ex) { 
       } catch (InstantiationException ex) { 
       } catch (IllegalAccessException ex) { 
       } catch (UnsupportedLookAndFeelException ex) { 
       } 

       JFrame frame = new JFrame("Test"); 
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
       frame.setLayout(new BorderLayout()); 
       frame.add(new TestPane()); 
       frame.pack(); 
       frame.setLocationRelativeTo(null); 
       frame.setVisible(true); 
      } 

     }); 
    } 

    public class TestPane extends JPanel { 

     private JTable table; 

     public TestPane() { 
      table = new JTable(); 
      setLayout(new BorderLayout()); 
      add(new JScrollPane(table)); 

      JButton btn = new JButton("Populate"); 
      btn.addActionListener(new ActionListener() { 
       @Override 
       public void actionPerformed(ActionEvent e) { 
        List<Object[]> values = new ArrayList<>(1000); 
        for (int index = 0; index < 1000; index++) { 
         Object[] row = new Object[3]; 
         row[0] = index; 
         row[1] = (int)(Math.random() * 100); 
         row[2] = (int)(Math.random() * 100); 
         values.add(row); 
        } 
        DefaultTableModel model = new DefaultTableModel(new Object[]{"dd", "nn", "mm"}, 0); 
        table.setModel(model); 
        for (Object[] obj : values) { 
         model.addRow(obj); 
        } 
       } 
      }); 
      add(btn, BorderLayout.SOUTH); 
     } 

     @Override 
     public Dimension getPreferredSize() { 
      return new Dimension(200, 200); 
     }   
    }  
}