用swing组件写出一个完整的酒店管理系统，并连接数据库

好的，下面是一个使用Swing组件编写的完整的酒店管理系统，并连接到数据库的示例代码：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;

public class HotelManagementSystem extends JFrame implements ActionListener {

    JMenuBar mb;
    JMenu m1, m2;
    JMenuItem i1, i2, i3, i4;
    JLabel l1, l2;

    HotelManagementSystem() {

        mb = new JMenuBar();
        add(mb);

        m1 = new JMenu("管理");
        mb.add(m1);

        m2 = new JMenu("帮助");
        mb.add(m2);

        i1 = new JMenuItem("添加客房");
        i1.addActionListener(this);
        m1.add(i1);

        i2 = new JMenuItem("客房列表");
        i2.addActionListener(this);
        m1.add(i2);

        i3 = new JMenuItem("删除客房");
        i3.addActionListener(this);
        m1.add(i3);

        i4 = new JMenuItem("退出");
        i4.addActionListener(this);
        m1.add(i4);

        l1 = new JLabel("欢迎来到酒店管理系统");
        l1.setBounds(200, 50, 400, 30);
        l1.setForeground(Color.BLUE);
        l1.setFont(new Font("Tahoma", Font.PLAIN, 30));
        add(l1);

        l2 = new JLabel();
        l2.setBounds(0, 0, 1000, 750);
        ImageIcon i1 = new ImageIcon(ClassLoader.getSystemResource("hotelmanagementsystem/icons/second.jpg"));
        Image i2 = i1.getImage().getScaledInstance(1000, 750, Image.SCALE_DEFAULT);
        ImageIcon i3 = new ImageIcon(i2);
        l2.setIcon(i3);
        add(l2);

        setLayout(null);
        setBounds(0, 0, 1000, 750);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent ae) {
        if (ae.getActionCommand().equals("添加客房")) {
            new AddRoom().setVisible(true);
        } else if (ae.getActionCommand().equals("客房列表")) {
            new Room().setVisible(true);
        } else if (ae.getActionCommand().equals("删除客房")) {
            new RemoveRoom().setVisible(true);
        } else if (ae.getActionCommand().equals("退出")) {
            System.exit(0);
        }
    }

    public static void main(String[] args) {
        new HotelManagementSystem().setVisible(true);
    }
}

class AddRoom extends JFrame implements ActionListener {

    JTextField t1, t2, t3, t4, t5;
    JComboBox c1, c2, c3;
    JButton b1, b2;

    AddRoom() {

        JLabel l1 = new JLabel("客房号");
        l1.setBounds(20, 30, 100, 20);
        add(l1);

        t1 = new JTextField();
        t1.setBounds(130, 30, 150, 20);
        add(t1);

        JLabel l2 = new JLabel("客房类型");
        l2.setBounds(20, 80, 100, 20);
        add(l2);

        c1 = new JComboBox(new String[] { "单人间", "双人间", "套房" });
        c1.setBounds(130, 80, 150, 20);
        add(c1);

        JLabel l3 = new JLabel("客房价格");
        l3.setBounds(20