完成四则运算登陆模块，记录用户的四则运算历史得分，实现查询历史得分，使用 Java 序列化和反序列化进行持久化存储学生信息和得分情况，完整代码

好的，以下是一个完整的示例代码，包括用户登录模块、四则运算练习模块以及使用 Java 序列化和反序列化进行持久化存储学生信息和得分情况的模块。

import java.io.*;

// 用户类，用于表示一个用户的信息
class User implements Serializable {
    private static final long serialVersionUID = 1L;
    private String username;
    private String password;

    public User(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }
}

// 题目类，用于表示一个四则运算题目
class Question implements Serializable {
    private static final long serialVersionUID = 1L;
    private String content;
    private int answer;

    public Question(String content, int answer) {
        this.content = content;
        this.answer = answer;
    }

    public String getContent() {
        return content;
    }

    public int getAnswer() {
        return answer;
    }

    // 随机生成一个四则运算题目
    public static Question generateQuestion() {
        int num1 = (int) (Math.random() * 100);
        int num2 = (int) (Math.random() * 100);
        int operator = (int) (Math.random() * 4);
        String content;
        int answer;
        switch (operator) {
            case 0:
                content = num1 + " + " + num2 + " = ";
                answer = num1 + num2;
                break;
            case 1:
                content = num1 + " - " + num2 + " = ";
                answer = num1 - num2;
                break;
            case 2:
                content = num1 + " * " + num2 + " = ";
                answer = num1 * num2;
                break;
            case 3:
                content = num1 + " / " + num2 + " = ";
                answer = num1 / num2;
                break;
            default:
                content = "";
                answer = 0;
                break;
        }
        return new Question(content, answer);
    }
}

// 得分类，用于表示一个学生的得分情况
class Score implements Serializable {
    private static final long serialVersionUID = 1L;
    private String username;
    private int score;

    public Score(String username, int score) {
        this.username = username;
        this.score = score;
    }

    public String getUsername() {
        return username;
    }

    public int getScore() {
        return score;
    }

    // 保存得分信息到文件中
    public static void saveScore(Score score) throws IOException {
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(score.getUsername() + ".dat"));
        oos.writeObject(score);
        oos.close();
    }

    // 从文件中读取得分信息
    public static Score readScore(String username) throws IOException, ClassNotFoundException {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(username + ".dat"));
        Score score = (Score) ois.readObject();
        ois.close();
        return score;
    }
}

// 主程序类
public class Main {
    private static User currentUser = null; // 当前用户
    private static int currentScore = 0; // 当前得分

    public static void main(String[] args) {
        // 显示登录界面
        LoginFrame loginFrame = new LoginFrame();
        loginFrame.setVisible(true);
    }

    // 用户登录
    public static boolean login(String username, String password) {
        // 检查用户名和密码是否正确
        User user = checkUser(username, password);
        if (user != null) {
            // 登录成功，记录当前用户
            currentUser = user;
            // 显示主界面
            MainFrame mainFrame = new MainFrame();
            mainFrame.setVisible(true);
            return true;
        }
        return false;
    }

    // 用户退出
    public static void logout() {
        // 记录得分信息到文件中
        try {
            Score.saveScore(new Score(currentUser.getUsername(), currentScore));
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 重置当前用户和得分
        currentUser = null;
        currentScore = 0;
        // 显示登录界面
        LoginFrame loginFrame = new LoginFrame();
        loginFrame.setVisible(true);
    }

    // 检查用户名和密码是否正确
    private static User checkUser(String username, String password) {
        // TODO: 实现用户验证逻辑，这里简单地返回一个固定的用户
        if (username.equals("admin") && password.equals("123456")) {
            return new User(username, password);
        }
        return null;
    }

    // 开始练习
    public static void startExercise() {
        // 显示题目界面
        QuestionFrame questionFrame = new QuestionFrame();
        questionFrame.setVisible(true);
        // 生成第一道题目
        generateNextQuestion();
    }

    // 生成下一道题目
    public static void generateNextQuestion() {
        // 生成一个新的题目
        Question question = Question.generateQuestion();
        // 在题目界面中显示题目内容
        QuestionFrame.updateQuestion(question.getContent());
    }

    // 计算得分
    public static void calculateScore(int answer) {
        // 获取当前题目的正确答案
        int correctAnswer = Question.generateQuestion().getAnswer();
        // 如果用户的答案与正确答案相同，则得分加 1
        if (answer == correctAnswer) {
            currentScore++;
        }
    }

    // 查询历史得分
    public static int queryScore(String username) {
        // 从文件中读取得分信息
        try {
            Score score = Score.readScore(username);
            return score.getScore();
        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
        return 0;
    }
}

// 登录界面类
class LoginFrame extends JFrame {
    private JTextField usernameField;
    private JPasswordField passwordField;

    public LoginFrame() {
        setTitle("登录");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 150);
        setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        add(panel);

        panel.setLayout(null);

        JLabel userLabel = new JLabel("用户名:");
        userLabel.setBounds(10, 10, 80, 25);
        panel.add(userLabel);

        usernameField = new JTextField(20);
        usernameField.setBounds(100, 10, 160, 25);
        panel.add(usernameField);

        JLabel passwordLabel = new JLabel("密码:");
        passwordLabel.setBounds(10, 40, 80, 25);
        panel.add(passwordLabel);

        passwordField = new JPasswordField(20);
        passwordField.setBounds(100, 40, 160, 25);
        panel.add(passwordField);

        JButton loginButton = new JButton("登录");
        loginButton.setBounds(60, 80, 80, 25);
        loginButton.addActionListener(e -> {
            String username = usernameField.getText();
            String password = new String(passwordField.getPassword());
            if (Main.login(username, password)) {
                dispose();
            } else {
                JOptionPane.showMessageDialog(null, "用户名或密码错误");
            }
        });
        panel.add(loginButton);

        JButton cancelButton = new JButton("取消");
        cancelButton.setBounds(160, 80, 80, 25);
        cancelButton.addActionListener(e -> {
            dispose();
        });
        panel.add(cancelButton);
    }
}

// 主界面类
class MainFrame extends JFrame {
    public MainFrame() {
        setTitle("四则运算练习");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 150);
        setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        add(panel);

        panel.setLayout(null);

        JLabel welcomeLabel = new JLabel("欢迎你，" + Main.currentUser.getUsername());
        welcomeLabel.setBounds(10, 10, 200, 25);
        panel.add(welcomeLabel);

        JButton startButton = new JButton("开始练习");
        startButton.setBounds(10, 40, 120, 25);
        startButton.addActionListener(e -> {
            Main.startExercise();
            dispose();
        });
        panel.add(startButton);

        JButton queryButton = new JButton("查询历史得分");
        queryButton.setBounds(140, 40, 140, 25);
        queryButton.addActionListener(e -> {
            int score = Main.queryScore(Main.currentUser.getUsername());
            JOptionPane.showMessageDialog(null, "你的历史得分是：" + score);
        });
        panel.add(queryButton);

        JButton logoutButton = new JButton("退出登录");
        logoutButton.setBounds(10, 80, 120, 25);
        logoutButton.addActionListener(e -> {
            Main.logout();
            dispose();
        });
        panel.add(logoutButton);
    }
}

// 题目界面类
class QuestionFrame extends JFrame {
    private static JTextArea questionArea;
    private JTextField answerField;

    public QuestionFrame() {
        setTitle("四则运算练习");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 150);
        setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        add(panel);

        panel.setLayout(null);

        JLabel questionLabel = new JLabel("题目:");
        questionLabel.setBounds(10, 10, 80, 25);
        panel.add(questionLabel);

        questionArea = new JTextArea();
        questionArea.setBounds(100, 10, 160, 50);
        questionArea.setEditable(false);
        panel.add(questionArea);

        JLabel answerLabel = new JLabel("答案:");
        answerLabel.setBounds(10, 70, 80, 25);
        panel.add(answerLabel);

        answerField = new JTextField(20);
        answerField.setBounds(100, 70, 160, 25);
        panel.add(answerField);

        JButton submitButton = new JButton("提交");
        submitButton.setBounds(100, 105, 80, 25);
        submitButton.addActionListener(e -> {
            try {
                int answer = Integer.parseInt(answerField.getText());
                Main.calculateScore(answer);
                Main.generateNextQuestion();
            } catch (NumberFormatException ex) {
                JOptionPane.showMessageDialog(null, "请输入正确的数字");
            }
        });
        panel.add(submitButton);
    }

    public static void updateQuestion(String question) {
        questionArea.setText(question);
    }
}

在上面的代码中，我们创建了三个类：User、Question 和 Score。User 类表示一个用户的信息，Question 类表示一个四则运算题目，Score 类表示一个学生的得分情况。我们还创建了一个主程序类 Main，用于协调用户登录、四则运算练习以及得分查询等功能。

在 Main 类中，我们使用了 Java Swing 来创建了三个界面：登录界面 LoginFrame、主界面 MainFrame 和题目界面 QuestionFrame。在登录界面中，我们使用 JTextField 和 JPasswordField 来获取用户输入的用户名和密码，然后调用