如何使用JTable获取单元格单击的id

Question

我正在使用JTable来显示数据库中的数据。我希望的是，当一行被点击时，它会打开另一个窗口。

我的代码

与数据库的连接

public class JFrametest extends javax.swing.JFrame {
      private static Connection connection;
    private static Statement stmt;
    static {
        // standard code to open a connection and statement to Java Derby database
        try {
            NetworkServerControl server = new NetworkServerControl();
            server.start(null);
            // Load JDBC driver
            Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
            //Establish a connection
            String sourceURL = "jdbc:derby://localhost:1527/"
                    + new File("EmailsDB").getAbsolutePath() + ";";
            connection = DriverManager.getConnection(sourceURL, "student", "student");
            stmt = connection.createStatement();
        } // The following exceptions must be caught
        catch (ClassNotFoundException cnfe) {
            out.println(cnfe);
        } catch (SQLException sqle) {
            out.println(sqle);
        } catch (Exception e) {
            System.out.println(e);
        }
    }

显示数据库中的数据

try {
     String query = "select * from messages";
PreparedStatement pst = connection.prepareStatement(query);
ResultSet rs = pst.executeQuery();
table.setModel(DbUtils.resultSetToTableModel(rs)); 
}catch (Exception e) {
    e.printStackTrace();
}

有人知道我能做什么吗？这可能吗？

Answer 1

您可以使用mouseClicked Action Listener来执行此操作。

Answer 2

您可以使用MouseListener，这里有一个简单的例子：

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class TestFrame extends JFrame {
    public static void main(String... s) {
        new TestFrame();
    }
    private JTable t;
    public TestFrame() {
        init();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }
    private void init() {
        DefaultTableModel model = new DefaultTableModel(0,2);
        for(int i=0;i<10;i++){
            model.addRow(new Object[]{i,"other info "+i});
        }
        model.setColumnIdentifiers(new Object[]{"id","info"});
        t = new JTable(model);
        t.addMouseListener(getListener());
        add(new JScrollPane(t));
    }
    protected void showDialog(int rowAtPoint) {
        Object valueAt = t.getValueAt(rowAtPoint, 0);
        // other operations
        JDialog d = new JDialog();
        d.setTitle("id="+valueAt);
        d.setModal(true);
        d.setAlwaysOnTop(true);
        d.setLocationRelativeTo(null);
        d.pack();
        d.setVisible(true);
    }
    private MouseListener getListener() {
        return new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                super.mouseClicked(e);
                if(e.getClickCount() >= 1){
                    int rowAtPoint = t.rowAtPoint(e.getPoint());
                    if(rowAtPoint != -1)
                        showDialog(rowAtPoint);
                }
            }
        };
    }
}