这个是我自己子页面写的一个表格的动态删除，你们可能运行不了（仅供参考）
思路：打开页面的时候先查询数据把表格插入到主面板中。在点击查询按钮的时候，把之前的插入到面板中的表格标签删除，然后再调用数据库删除，修改数据后，在查询数据重新向表格添加数据，然后再把添加后的表格插入面板中。刷新页面即可。（刷新页面是重点，不刷新页面数据是出不来的）
刷新主页面的代码：SwingUtilities.updateComponentTreeUI(Head.frame);
刷新页面中的子页面代码：internalFrame.updateUI();
package GUI_Object.GUI;
import GUI_Object.mysql.Database;
import GUI_Object.opjo.User;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.event.InternalFrameAdapter;
import javax.swing.event.InternalFrameEvent;
import javax.xml.crypto.Data;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.List;
//管理员页面子页面修改添加用户
public class UpdatePasswd {
public static JDesktopPane jDesktopPane = new JDesktopPane();//主页面 主面板
private static String[] columnNames = new String[]{"用户名", "密码", "权限"};
private static JPanel panel = new JPanel();//子页面内容面板
// panel.setLayout(new BorderLayout());//设置布局
private static JTable t = null;
private static JLabel label = new JLabel("用户名：");
private static JButton button = new JButton("查询");
private static JTextField field = new JTextField(12);
private static JScrollPane jScrollPane = new JScrollPane(t);
private static JPanel panel2 = new JPanel();
private static JLabel jLabel = new JLabel("用户名");//用户名
private static JTextField jTextField = new JTextField(12);//用户名文本框
private static JLabel jLabel1 = new JLabel("密码");//密码
private static JPasswordField passwordField = new JPasswordField(12);//密码框
private static JButton jButton = new JButton("添加用户");
private static JButton jButton1 = new JButton("删除用户");
private static JLabel jLabel2 = new JLabel("用户权限");//用户权限
private static Object[] arr = {"普通用户", "管理员用户"};
private static JComboBox jComboBox = new JComboBox(arr);
private static JInternalFrame internalFrame = new JInternalFrame("修改密码", true, true, true, true);
private static JPanel panel1 = new JPanel();
public static void Update(JFrame frame) {
internalFrame.setSize(800, 500);//设置窗口大小
t=null;
internalFrame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);//关闭按钮
internalFrame.setLayout(new BorderLayout());//设置子页面布局
List users = Database.SelectUser();//调用数据库查询数据
String[][] heros = new String[users.size()][3];
for (int i = 0; i < users.size(); i++) {
User user = users.get(i);
heros[i][0] = user.getUser();
heros[i][1] = user.getPasswd();
if (user.getJudge() == 1) {
heros[i][2] = "管理员用户";
} else {
heros[i][2] = "普通用户";
}
}
t = new JTable(heros, columnNames);
jScrollPane = new JScrollPane(t);
panel1.add(jScrollPane);
internalFrame.updateUI();
button.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
panel1.remove(jScrollPane);//在面板上删除原有的表格
String text = field.getText();
List users = Database.SelectUser(text);//调用数据库查询数据
String[][] heros = new String[users.size()][3];
for (int i = 0; i < users.size(); i++) {
User user = users.get(i);
heros[i][0] = user.getUser();
heros[i][1] = user.getPasswd();
if (user.getJudge() == 1) {
heros[i][2] = "管理员用户";
} else {
heros[i][2] = "普通用户";
}
}
t = new JTable(heros, columnNames);
jScrollPane = new JScrollPane(t);//在表格里面添加新数据
panel1.add(jScrollPane);
internalFrame.updateUI();//刷新子表格，，刷新整个页面可以使用 SwingUtilities.updateComponentTreeUI(Head.frame);
}
});
panel2.setLayout(new FlowLayout());
panel2.add(jLabel);//用户名
panel2.add(jTextField);//用户名文本框
panel2.add(jLabel1);//密码
panel2.add(passwordField);//密码文本框
panel2.add(jLabel2);//用户权限
panel2.add(jComboBox);//下拉列表
panel2.add(jButton1);//删除用户
panel2.add(jButton);//添加用户
internalFrame.add(panel2, BorderLayout.SOUTH);
panel1.add(jScrollPane);
int defaultCloseOperation = internalFrame.getDefaultCloseOperation();
System.out.println(defaultCloseOperation);
// 表格上的title
panel.add(label);
panel.add(field);
panel.add(button);
internalFrame.add(panel, BorderLayout.NORTH);//窗口添加面板
internalFrame.add(panel1, BorderLayout.CENTER);//添加表格到面板中间
jDesktopPane.add(internalFrame); //讲子页面，添加到主面板
frame.add(jDesktopPane, BorderLayout.CENTER); //讲主面板添加到页面中
internalFrame.setVisible(true); //字面显示状态为true
//刷新页面
jButton1.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
String text = jTextField.getText();
String passwd = passwordField.getText();
int Index = jComboBox.getSelectedIndex();
Boolean aBoolean = Database.RemoveUser(text, passwd, Index);
if (aBoolean){
JOptionPane.showMessageDialog(panel2, "恭喜你，删除用户成功", "通知", JOptionPane.INFORMATION_MESSAGE);
}else {
JOptionPane.showMessageDialog(panel2, "抱歉，删除用户失败", "警告", JOptionPane.ERROR_MESSAGE);
}
internalFrame.updateUI();
}
});
jButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
String text = jTextField.getText();
String passwd = passwordField.getText();
int Index = jComboBox.getSelectedIndex();
Boolean aBoolean = Database.AddUser(text, passwd, Index);
if (aBoolean){
JOptionPane.showMessageDialog(panel2, "恭喜你，用户注册成功", "通知", JOptionPane.INFORMATION_MESSAGE);
}else {
JOptionPane.showMessageDialog(panel2, "抱歉，用户注册失败", "警告", JOptionPane.ERROR_MESSAGE);
}
}
});
SwingUtilities.updateComponentTreeUI(Head.frame);//刷新整个页面
}
}
