package dormitory_20221550; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class choose { public static void main(String[] args) { new choose1(); } } class choose1 extends JFrame implements ActionListener{ JLabel lbl_p1; JButton btn1; JButton btn2; JButton btn3; JPanel jp1; String path ="src/dormitory_20221550/picture/p1"; public choose1() { jp1=new JPanel(); setTitle("欢迎进入上海电力大学宿舍管理系统"); btn1=new JButton("学生登录"); btn2=new JButton("职工登录"); btn3=new JButton("访客申请"); setLayout(new BorderLayout()); btn1.addActionListener(this); btn2.addActionListener(this); btn3.addActionListener(this); jp1.add(btn1); jp1.add(btn2); jp1.add(btn3); add(jp1,BorderLayout.SOUTH); lbl_p1=new JLabel(new ImageIcon(path+"p1.png")); add(lbl_p1,BorderLayout.CENTER); setBounds(300,150,600,400); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void actionPerformed(ActionEvent e) { } }修改插入图片的代码

您需要将代码中的图片路径修改为正确的路径，同时将图片文件放置到指定位置。请将以下代码：

String path ="src/dormitory_20221550/picture/p1";
lbl_p1=new JLabel(new ImageIcon(path+"p1.png"));

修改为：

String path ="dormitory_20221550/picture/p1/"; // 图片路径
lbl_p1=new JLabel(new ImageIcon(getClass().getResource(path + "p1.png"))); // 加载图片

然后将图片文件放置到项目目录下的 `dormitory_20221550/picture/p1/` 文件夹中。这样就可以插入图片了。

相关问题

import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class DormitoryManagementLogin extends JFrame implements ActionListener { private JLabel titleLabel, usernameLabel, passwordLabel; private JTextField usernameField; private JPasswordField passwordField; private JButton loginButton, resetButton; public DormitoryManagementLogin() { super("Dormitory Management Login"); setSize(400, 300); setDefaultCloseOperation(EXIT_ON_CLOSE); titleLabel = new JLabel("Dormitory Management Login"); titleLabel.setFont(new Font("Arial", Font.BOLD, 20)); titleLabel.setForeground(Color.BLUE); titleLabel.setHorizontalAlignment(JLabel.CENTER); usernameLabel = new JLabel("Username:"); passwordLabel = new JLabel("Password:"); usernameField = new JTextField(); passwordField = new JPasswordField(); loginButton = new JButton("Login"); resetButton = new JButton("Reset"); loginButton.addActionListener(this); resetButton.addActionListener(this); JPanel panel = new JPanel(new GridLayout(3, 2)); panel.add(usernameLabel); panel.add(usernameField); panel.add(passwordLabel); panel.add(passwordField); panel.add(loginButton); panel.add(resetButton); add(titleLabel, BorderLayout.NORTH); add(panel, BorderLayout.CENTER); setVisible(true); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == loginButton) { String username = usernameField.getText(); String password = String.valueOf(passwordField.getPassword()); // 在这里添加登录验证逻辑 JOptionPane.showMessageDialog(this, "登录成功！"); // 登录成功后跳转到宿舍管理主界面 new DormitoryManagementMain(); dispose(); } else if (e.getSource() == resetButton) { usernameField.setText(""); passwordField.setText(""); } } public static void main(String[] args) { new DormitoryManagementLogin(); }}请修改代码错误

代码中没有明显的错误，但是为了使代码更加规范和易读，可以对其中一些部分进行优化。例如：

1. 在类名后面加上 `{}`，表示该类是一个独立的代码块。

2. 将 `JFrame.EXIT_ON_CLOSE` 改为 `WindowConstants.EXIT_ON_CLOSE`，使代码更加易读。

3. 将 `setDefaultCloseOperation(EXIT_ON_CLOSE)` 改为 `setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)`。

4. 将 `String password = String.valueOf(passwordField.getPassword())` 改为 `String password = new String(passwordField.getPassword())`，因为 `String.valueOf()` 方法返回的是 char 数组的字符串表示形式，而不是密码字符串本身。

修改后的代码如下：

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class DormitoryManagementLogin extends JFrame implements ActionListener {

    private JLabel titleLabel, usernameLabel, passwordLabel;
    private JTextField usernameField;
    private JPasswordField passwordField;
    private JButton loginButton, resetButton;

    public DormitoryManagementLogin() {
        super("Dormitory Management Login");

        titleLabel = new JLabel("Dormitory Management Login");
        titleLabel.setFont(new Font("Arial", Font.BOLD, 20));
        titleLabel.setForeground(Color.BLUE);
        titleLabel.setHorizontalAlignment(JLabel.CENTER);

        usernameLabel = new JLabel("Username:");
        passwordLabel = new JLabel("Password:");

        usernameField = new JTextField();
        passwordField = new JPasswordField();

        loginButton = new JButton("Login");
        resetButton = new JButton("Reset");

        loginButton.addActionListener(this);
        resetButton.addActionListener(this);

        JPanel panel = new JPanel(new GridLayout(3, 2));
        panel.add(usernameLabel);
        panel.add(usernameField);
        panel.add(passwordLabel);
        panel.add(passwordField);
        panel.add(loginButton);
        panel.add(resetButton);

        add(titleLabel, BorderLayout.NORTH);
        add(panel, BorderLayout.CENTER);

        setSize(400, 300);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == loginButton) {
            String username = usernameField.getText();
            String password = new String(passwordField.getPassword());

            // 在这里添加登录验证逻辑

            JOptionPane.showMessageDialog(this, "登录成功！");

            // 登录成功后跳转到宿舍管理主界面
            new DormitoryManagementMain();
            dispose();
        } else if (e.getSource() == resetButton) {
            usernameField.setText("");
            passwordField.setText("");
        }
    }

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

校园宿舍管理系统java+swing+jdbc代码

以下是一个简单的校园宿舍管理系统的Java代码，使用了Swing和JDBC库。请注意，这只是一个简单的示例代码，您需要根据自己的需求进行修改和完善。

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

public class DormitoryManagementSystem extends JFrame implements ActionListener {

    JLabel title, nameLabel, genderLabel, roomNoLabel, dateLabel;
    JTextField nameField, roomNoField, dateField;
    JComboBox genderBox;
    JButton addBtn, viewBtn, clearBtn;

    Connection conn = null;
    PreparedStatement pst = null;
    ResultSet rs = null;

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

    public DormitoryManagementSystem() {
        super("校园宿舍管理系统");

        Container container = getContentPane();
        container.setLayout(new GridLayout(6, 2));

        title = new JLabel("宿舍管理系统", JLabel.CENTER);
        nameLabel = new JLabel("姓名", JLabel.CENTER);
        genderLabel = new JLabel("性别", JLabel.CENTER);
        roomNoLabel = new JLabel("房间号", JLabel.CENTER);
        dateLabel = new JLabel("入住日期(yyyy-mm-dd)", JLabel.CENTER);

        nameField = new JTextField();
        genderBox = new JComboBox(new String[] { "男", "女" });
        roomNoField = new JTextField();
        dateField = new JTextField();

        addBtn = new JButton("添加");
        viewBtn = new JButton("查看");
        clearBtn = new JButton("清空");

        addBtn.addActionListener(this);
        viewBtn.addActionListener(this);
        clearBtn.addActionListener(this);

        container.add(title);
        container.add(new JLabel());
        container.add(nameLabel);
        container.add(nameField);
        container.add(genderLabel);
        container.add(genderBox);
        container.add(roomNoLabel);
        container.add(roomNoField);
        container.add(dateLabel);
        container.add(dateField);
        container.add(addBtn);
        container.add(viewBtn);
        container.add(clearBtn);

        setSize(400, 250);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/dormitory", "root", "password");
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == addBtn) {
            String name = nameField.getText();
            String gender = genderBox.getSelectedItem().toString();
            String roomNo = roomNoField.getText();
            String date = dateField.getText();

            try {
                pst = conn.prepareStatement("insert into student(name, gender, roomNo, date) values(?,?,?,?)");
                pst.setString(1, name);
                pst.setString(2, gender);
                pst.setString(3, roomNo);
                pst.setString(4, date);
                pst.executeUpdate();
                JOptionPane.showMessageDialog(this, "添加成功");
            } catch (SQLException ex) {
                System.out.println(ex);
                JOptionPane.showMessageDialog(this, "添加失败");
            }
        } else if (e.getSource() == viewBtn) {
            try {
                pst = conn.prepareStatement("select * from student");
                rs = pst.executeQuery();
                StringBuilder sb = new StringBuilder();
                while (rs.next()) {
                    sb.append(rs.getString("name")).append("\t");
                    sb.append(rs.getString("gender")).append("\t");
                    sb.append(rs.getString("roomNo")).append("\t");
                    sb.append(rs.getString("date")).append("\n");
                }
                JOptionPane.showMessageDialog(this, sb.toString());
            } catch (SQLException ex) {
                System.out.println(ex);
                JOptionPane.showMessageDialog(this, "查询失败");
            }
        } else if (e.getSource() == clearBtn) {
            nameField.setText("");
            genderBox.setSelectedIndex(0);
            roomNoField.setText("");
            dateField.setText("");
        }
    }
}

该代码使用了MySQL数据库，需要首先安装MySQL并创建一个名为dormitory的数据库。请将代码中的“password”替换为您的MySQL密码。

该代码实现了一个简单的宿舍管理系统，包括添加学生信息、查看学生信息和清空输入框等功能。您可以根据自己的需求进行修改和扩展。