单击jbutton i jtable获取数据库值？

Question

这是我的代码

import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JOptionPane;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

public class DisplayResult extends JPanel {
    private boolean DEBUG = false;
        // JDBC driver name and database URL
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver"; // use specific driver for your database
    static final String DB_URL = "jdbc:mysql://localhost:3306/abc";
    // Database credentials
    static final String USER = "root";
    static final String PASS = "";
    Connection conn = null;
    Statement stmt = null;
    static Vector<Vector<String>> data = new Vector<Vector<String>>();

    public DisplayResult() {
        super(new GridLayout(1,0));


        int i=0;
    Vector<String> columnNames = new Vector<String>();
         columnNames.add("column1");
        columnNames.add("column2");
        columnNames.add("column3");
        columnNames.add("Button");

    String query =
                "select city, name, r_no from test";


        try {
            conn = DriverManager.getConnection(DB_URL, USER, PASS);
            stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery(query);
        while (rs.next()) {

                Vector<String> vstring = new Vector<String>();


                 vstring.add(rs.getString("city"));
                vstring.add(rs.getString("name"));
                vstring.add(rs.getString("r_no"));
                vstring.add("Button"+i);
                 vstring.add("\n\n\n\n\n\n\n");
                 i++;
                data.add(vstring);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (stmt != null) {
                try {
                    stmt.close();
                } catch (SQLException ex) {
                  }
            }
        }

      //  final JTable table = new JTable(data, columnNames);
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        final JTable table = new JTable(model);
        table.getColumn("Button").setCellRenderer(new ButtonRenderer());
table.getColumn("Button").setCellEditor(new ButtonEditor(new JCheckBox()));
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
        table.setFillsViewportHeight(true);

        if (DEBUG) {
            table.addMouseListener(new MouseAdapter() {
                public void mouseClicked(MouseEvent e) {
                    printDebugData(table);
                }
            });
        }

        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);

        //Add the scroll pane to this panel.
        add(scrollPane);
    }

    private void printDebugData(JTable table) {
        int numRows = table.getRowCount();
        int numCols = table.getColumnCount();
        javax.swing.table.TableModel model = table.getModel();

        System.out.println("Value of data: ");
        for (int i=0; i < numRows; i++) {
            System.out.print("    row " + i + ":");
            for (int j=0; j < numCols; j++) {
                System.out.print("  " + model.getValueAt(i, j));
            }
            System.out.println();
        }
        System.out.println("--------------------------");
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    public static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("Database Data");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        DisplayResult newContentPane = new DisplayResult();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

   public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
       //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
               createAndShowGUI();
            }
       });
    }
}
class ButtonRenderer extends JButton implements TableCellRenderer {

    public ButtonRenderer() {
        setOpaque(true);
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        if (isSelected) {
            setForeground(table.getSelectionForeground());
            setBackground(table.getSelectionBackground());
        } else {
            setForeground(table.getForeground());
            setBackground(UIManager.getColor("Button.background"));
        }
        setText((value == null) ? "" : value.toString());
        return this;
    }
}

class ButtonEditor extends DefaultCellEditor {

    protected JButton button;
    private String label;
    private boolean isPushed;

    public ButtonEditor(JCheckBox checkBox) {
        super(checkBox);
        button = new JButton();
        button.setOpaque(true);
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //x=e.getSource();
                fireEditingStopped();
            }
        });
    }

    @Override
    public Component getTableCellEditorComponent(JTable table, Object value,
            boolean isSelected, int row, int column) {
        if (isSelected) {
            button.setForeground(table.getSelectionForeground());
            button.setBackground(table.getSelectionBackground());
        } else {
            button.setForeground(table.getForeground());
            button.setBackground(table.getBackground());
        }
        label = (value == null) ? "" : value.toString();
        button.setText(label);
        isPushed = true;
        return button;
    }

    @Override
    public Object getCellEditorValue() {
        if (isPushed) {

            JOptionPane.showMessageDialog(button, label + ": Button Action!");
        }
        isPushed = false;
        return label;
    }

    @Override
    public boolean stopCellEditing() {
        isPushed = false;
        return super.stopCellEditing();
    }

    @Override
    protected void fireEditingStopped() {
        super.fireEditingStopped();
    }
}

我已经为每一行添加了按钮，它也在执行操作 但是在变量“label”中，我希望从特定数据库行的数据库列中获取特定值。谁能告诉我怎么做？