controller层更新

src/main/java/com/mathgenerator/controller/LoginController.java

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+package com.mathgenerator.controller;
+
+import com.mathgenerator.model.User;
+import com.mathgenerator.service.UserService;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.PasswordField;
+import javafx.scene.control.TextField;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+import java.util.Optional;
+
+public class LoginController {
+
+    // 依赖注入后端服务
+    private final UserService userService = new UserService();
+
+    // @FXML注解将FXML文件中的控件与这里的变量关联起来
+    @FXML
+    private TextField usernameField;
+
+    @FXML
+    private PasswordField passwordField;
+
+    @FXML
+    private Button loginButton;
+
+    @FXML
+    private Button registerButton;
+
+    @FXML
+    private Label statusLabel;
+
+    /**
+     * 处理登录按钮点击事件。
+     * @param event 事件对象
+     */
+    @FXML
+    private void handleLoginButtonAction(ActionEvent event) {
+        String username = usernameField.getText();
+        String password = passwordField.getText();
+
+        if (username.isEmpty() || password.isEmpty()) {
+            statusLabel.setText("用户名和密码不能为空！");
+            return;
+        }
+
+        Optional<User> userOptional = userService.login(username, password);
+
+        if (userOptional.isPresent()) {
+            statusLabel.setText("登录成功！");
+            // 登录成功，调用新方法跳转到主菜单
+            loadMainMenu(userOptional.get());
+        } else {
+            statusLabel.setText("登录失败：用户名或密码错误。");
+        }
+    }
+
+    /**
+     * 处理注册按钮点击事件，跳转到注册界面。
+     * @param event 事件对象
+     */
+    @FXML
+    private void handleRegisterButtonAction(ActionEvent event) {
+        loadScene("/com/mathgenerator/view/RegisterView.fxml");
+    }
+
+    /**
+     * 加载主菜单界面，并传递用户信息。
+     * @param user 登录成功的用户对象
+     */
+    private void loadMainMenu(User user) {
+        try {
+            // 1. 加载 FXML 文件
+            FXMLLoader loader = new FXMLLoader(getClass().getResource("/com/mathgenerator/view/MainMenuView.fxml"));
+            Parent root = loader.load();
+
+            // 2. 获取新界面的控制器
+            MainMenuController controller = loader.getController();
+
+            // 3. 调用控制器的方法，传递数据
+            controller.initData(user);
+
+            // 4. 显示新场景
+            Stage stage = (Stage) loginButton.getScene().getWindow();
+            stage.setScene(new Scene(root));
+            stage.setTitle("主菜单");
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * 切换到简单场景的辅助方法（如注册页）。
+     * @param fxmlPath FXML文件的路径
+     */
+    private void loadScene(String fxmlPath) {
+        try {
+            Parent root = FXMLLoader.load(getClass().getResource(fxmlPath));
+            Stage stage = (Stage) loginButton.getScene().getWindow();
+            stage.setScene(new Scene(root));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/com/mathgenerator/controller/MainMenuController.java

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+package com.mathgenerator.controller;
+
+import com.mathgenerator.model.Level;
+import com.mathgenerator.model.User;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.TextField;
+import javafx.stage.Stage;
+import java.io.IOException;
+
+public class MainMenuController {
+
+    private User currentUser;
+
+    @FXML private Label welcomeLabel;
+    @FXML private TextField questionCountField;
+    @FXML private Label statusLabel;
+    @FXML private Button logoutButton;
+
+    /**
+     * 初始化控制器，接收登录成功的用户信息。
+     * @param user 当前登录的用户
+     */
+    public void initData(User user) {
+        this.currentUser = user;
+        welcomeLabel.setText("欢迎, " + currentUser.username() + "!");
+    }
+
+    @FXML
+    private void handlePrimaryAction(ActionEvent event) {
+        startQuiz(Level.PRIMARY);
+    }
+
+    @FXML
+    private void handleJuniorHighAction(ActionEvent event) {
+        startQuiz(Level.JUNIOR_HIGH);
+    }
+
+    @FXML
+    private void handleSeniorHighAction(ActionEvent event) {
+        startQuiz(Level.SENIOR_HIGH);
+    }
+
+    @FXML
+    private void handleChangePasswordAction(ActionEvent event) {
+        // TODO: 跳转到修改密码界面
+        statusLabel.setText("修改密码功能待实现。");
+    }
+
+    @FXML
+    private void handleLogoutAction(ActionEvent event) {
+        // 跳转回登录界面
+        loadScene("/com/mathgenerator/view/LoginView.fxml");
+    }
+
+    /**
+     * 验证输入并准备开始答题。
+     * @param level 选择的难度
+     */
+    private void startQuiz(Level level) {
+        try {
+            int count = Integer.parseInt(questionCountField.getText());
+            if (count < 1 || count > 50) {
+                statusLabel.setText("题目数量必须在 1 到 50 之间！");
+                return;
+            }
+
+            // 加载答题界面，并传递数据
+            FXMLLoader loader = new FXMLLoader(getClass().getResource("/com/mathgenerator/view/QuizView.fxml"));
+            Parent root = loader.load();
+
+            QuizController controller = loader.getController();
+            controller.initData(currentUser, level, count);
+
+            Stage stage = (Stage) logoutButton.getScene().getWindow();
+            stage.setScene(new Scene(root));
+            stage.setTitle(level.getChineseName() + " - 答题中");
+
+        } catch (NumberFormatException e) {
+            statusLabel.setText("请输入有效的题目数量！");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void loadScene(String fxmlPath) {
+        try {
+            Stage stage = (Stage) logoutButton.getScene().getWindow();
+            Parent root = FXMLLoader.load(getClass().getResource(fxmlPath));
+            stage.setScene(new Scene(root));
+            stage.setTitle("用户登录"); // 返回登录时重置标题
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/com/mathgenerator/controller/QuizController.java

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+package com.mathgenerator.controller;
+
+import com.mathgenerator.model.ChoiceQuestion;
+import com.mathgenerator.model.Level;
+import com.mathgenerator.model.User;
+import com.mathgenerator.service.PaperService;
+import com.mathgenerator.service.strategy.MixedDifficultyStrategy;
+import com.mathgenerator.storage.FileManager;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.ProgressBar;
+import javafx.scene.control.RadioButton;
+import javafx.scene.control.ToggleGroup;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class QuizController {
+
+    // --- 后端服务 ---
+    private final PaperService paperService;
+
+    // --- 答题状态 ---
+    private User currentUser;
+    private List<ChoiceQuestion> questions;
+    private List<Integer> userAnswers = new ArrayList<>();
+    private int currentQuestionIndex = 0;
+
+    // --- FXML 控件 ---
+    @FXML private Label questionNumberLabel;
+    @FXML private ProgressBar progressBar;
+    @FXML private Label questionTextLabel;
+    @FXML private ToggleGroup optionsGroup;
+    @FXML private RadioButton option1, option2, option3, option4;
+    @FXML private Button submitButton;
+    @FXML private Label statusLabel;
+
+    /**
+     * 构造函数，初始化后端服务
+     */
+    public QuizController() {
+        // 这是依赖注入的一种简化形式，在真实项目中会使用框架管理
+        FileManager fileManager = new FileManager();
+        MixedDifficultyStrategy strategy = new MixedDifficultyStrategy();
+        this.paperService = new PaperService(fileManager, strategy);
+    }
+
+    /**
+     * 接收从主菜单传递过来的数据，并开始答题
+     */
+    public void initData(User user, Level level, int questionCount) {
+        this.currentUser = user;
+        // 调用后端服务生成题目
+        this.questions = paperService.createPaper(user, questionCount, level);
+        displayCurrentQuestion();
+    }
+
+    /**
+     * 显示当前的题目和选项
+     */
+    private void displayCurrentQuestion() {
+        ChoiceQuestion currentQuestion = questions.get(currentQuestionIndex);
+
+        questionNumberLabel.setText(String.format("第 %d / %d 题", currentQuestionIndex + 1, questions.size()));
+        progressBar.setProgress((double) (currentQuestionIndex + 1) / questions.size());
+        questionTextLabel.setText(currentQuestion.questionText());
+
+        List<RadioButton> radioButtons = List.of(option1, option2, option3, option4);
+        for (int i = 0; i < radioButtons.size(); i++) {
+            radioButtons.get(i).setText(currentQuestion.options().get(i));
+        }
+
+        optionsGroup.selectToggle(null); // 清除上一次的选择
+        statusLabel.setText(""); // 清除状态提示
+
+        if (currentQuestionIndex == questions.size() - 1) {
+            submitButton.setText("完成答题");
+        }
+    }
+
+    /**
+     * 处理提交按钮的点击事件
+     */
+    @FXML
+    private void handleSubmitButtonAction(ActionEvent event) {
+        RadioButton selectedRadioButton = (RadioButton) optionsGroup.getSelectedToggle();
+        if (selectedRadioButton == null) {
+            statusLabel.setText("请选择一个答案！");
+            return;
+        }
+
+        // 记录用户答案的索引
+        List<RadioButton> radioButtons = List.of(option1, option2, option3, option4);
+        userAnswers.add(radioButtons.indexOf(selectedRadioButton));
+
+        // 移动到下一题或结束答题
+        currentQuestionIndex++;
+        if (currentQuestionIndex < questions.size()) {
+            displayCurrentQuestion();
+        } else {
+            // 答题结束，计算分数并跳转到分数界面
+            calculateScoreAndShowResults();
+        }
+    }
+
+    /**
+     * 计算分数并准备跳转到结果页面
+     */
+    private void calculateScoreAndShowResults() {
+        int correctCount = 0;
+        for (int i = 0; i < questions.size(); i++) {
+            if (userAnswers.get(i) == questions.get(i).correctOptionIndex()) {
+                correctCount++;
+            }
+        }
+        double score = (double) correctCount / questions.size() * 100;
+
+        // 禁用当前页面的按钮
+        submitButton.setDisable(true);
+        statusLabel.setText("答题已完成，正在为您计算分数...");
+
+        // 加载分数界面并传递数据
+        try {
+            FXMLLoader loader = new FXMLLoader(getClass().getResource("/com/mathgenerator/view/ScoreView.fxml"));
+            Parent root = loader.load();
+
+            ScoreController controller = loader.getController();
+            controller.initData(currentUser, score); // 将用户和分数传递过去
+
+            Stage stage = (Stage) submitButton.getScene().getWindow();
+            stage.setScene(new Scene(root));
+            stage.setTitle("答题结果");
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/com/mathgenerator/controller/RegisterController.java

@@ -0,0 +1,95 @@
+package com.mathgenerator.controller;
+
+import com.mathgenerator.service.UserService;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.PasswordField;
+import javafx.scene.control.TextField;
+import javafx.stage.Stage;
+import java.io.IOException;
+
+public class RegisterController {
+
+    private final UserService userService = new UserService();
+    private String sentCode; // 用于存储已发送的验证码
+
+    @FXML private TextField usernameField;
+    @FXML private TextField emailField;
+    @FXML private TextField verificationCodeField;
+    @FXML private PasswordField passwordField;
+    @FXML private PasswordField confirmPasswordField;
+    @FXML private Button sendCodeButton;
+    @FXML private Button registerButton;
+    @FXML private Button backToLoginButton;
+    @FXML private Label statusLabel;
+
+    @FXML
+    private void handleSendCodeAction(ActionEvent event) {
+        String email = emailField.getText();
+        if (email.isEmpty() || !email.contains("@")) {
+            statusLabel.setText("请输入一个有效的邮箱地址！");
+            return;
+        }
+        // 调用后端服务发送验证码（模拟）
+        this.sentCode = userService.sendVerificationCode(email);
+        statusLabel.setText("验证码已发送（请查看控制台输出）。");
+        sendCodeButton.setDisable(true); // 防止重复点击
+    }
+
+    @FXML
+    private void handleRegisterAction(ActionEvent event) {
+        // 1. 字段校验
+        if (usernameField.getText().isEmpty() || emailField.getText().isEmpty() ||
+                verificationCodeField.getText().isEmpty() || passwordField.getText().isEmpty()) {
+            statusLabel.setText("所有字段都不能为空！");
+            return;
+        }
+        if (!passwordField.getText().equals(confirmPasswordField.getText())) {
+            statusLabel.setText("两次输入的密码不匹配！");
+            return;
+        }
+        if (this.sentCode == null || !this.sentCode.equals(verificationCodeField.getText())) {
+            statusLabel.setText("验证码错误！");
+            return;
+        }
+        if (!UserService.isPasswordValid(passwordField.getText())) {
+            statusLabel.setText("密码格式错误！必须为6-10位，且包含大小写字母和数字。");
+            return;
+        }
+
+        // 2. 调用后端服务进行注册
+        boolean success = userService.register(
+                usernameField.getText(),
+                emailField.getText(),
+                passwordField.getText()
+        );
+
+        // 3. 根据结果更新UI
+        if (success) {
+            statusLabel.setText("注册成功！请返回登录。");
+            registerButton.setDisable(true);
+        } else {
+            statusLabel.setText("注册失败：用户名或邮箱已被占用。");
+        }
+    }
+
+    @FXML
+    private void handleBackToLoginAction(ActionEvent event) {
+        loadScene("/com/mathgenerator/view/LoginView.fxml");
+    }
+
+    private void loadScene(String fxmlPath) {
+        try {
+            Parent root = FXMLLoader.load(getClass().getResource(fxmlPath));
+            Stage stage = (Stage) backToLoginButton.getScene().getWindow();
+            stage.setScene(new Scene(root));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/com/mathgenerator/controller/ScoreController.java

@@ -0,0 +1,77 @@
+package com.mathgenerator.controller;
+
+import com.mathgenerator.model.User;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.stage.Stage;
+import java.io.IOException;
+
+public class ScoreController {
+
+    private User currentUser;
+
+    @FXML private Label scoreLabel;
+    @FXML private Label resultMessageLabel;
+    @FXML private Button tryAgainButton;
+    @FXML private Button logoutButton;
+
+    /**
+     * 初始化控制器，接收答题结果数据
+     * @param user 当前用户
+     * @param score 最终得分
+     */
+    public void initData(User user, double score) {
+        this.currentUser = user;
+        scoreLabel.setText(String.format("%.2f", score));
+
+        // 根据分数显示不同的鼓励语
+        if (score == 100.0) {
+            resultMessageLabel.setText("太棒了！你答对了所有题目！");
+        } else if (score >= 80) {
+            resultMessageLabel.setText("非常不错！继续努力！");
+        } else if (score >= 60) {
+            resultMessageLabel.setText("成绩合格，再接再厉！");
+        } else {
+            resultMessageLabel.setText("别灰心，下次会更好的！");
+        }
+    }
+
+    /**
+     * 处理“再做一组”按钮事件，返回主菜单
+     */
+    @FXML
+    private void handleTryAgainAction(ActionEvent event) {
+        try {
+            FXMLLoader loader = new FXMLLoader(getClass().getResource("/com/mathgenerator/view/MainMenuView.fxml"));
+            Parent root = loader.load();
+            MainMenuController controller = loader.getController();
+            controller.initData(currentUser); // 将用户信息传回主菜单
+
+            Stage stage = (Stage) tryAgainButton.getScene().getWindow();
+            stage.setScene(new Scene(root));
+            stage.setTitle("主菜单");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * 处理“退出登录”按钮事件，返回登录界面
+     */
+    @FXML
+    private void handleLogoutAction(ActionEvent event) {
+        try {
+            Parent root = FXMLLoader.load(getClass().getResource("/com/mathgenerator/view/LoginView.fxml"));
+            Stage stage = (Stage) logoutButton.getScene().getWindow();
+            stage.setScene(new Scene(root));
+            stage.setTitle("用户登录");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}