diff --git a/src/Math_learning_app.java b/src/Math_learning_app.java
new file mode 100644
index 0000000..7d785e4
--- /dev/null
+++ b/src/Math_learning_app.java
@@ -0,0 +1,38 @@
+import View.MainFrame;
+
+import javax.swing.*;
+
+public class Math_learning_app {
+ public static void main(String[] args) {
+ // 设置系统样式 - 使用正确的方法
+ try {
+ // 使用跨平台外观
+ UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
+
+ // 或者使用系统默认外观（推荐）
+ // UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+
+ } catch (Exception e) {
+ // 如果设置失败，使用默认外观
+ System.err.println("无法设置外观，使用默认外观");
+ e.printStackTrace();
+ }
+
+ // 在事件分发线程中创建和显示GUI
+ SwingUtilities.invokeLater(new Runnable() {
+ @Override
+ public void run() {
+ try {
+ MainFrame mainFrame = new MainFrame();
+ mainFrame.setVisible(true);
+ } catch (Exception e) {
+ JOptionPane.showMessageDialog(null,
+ "程序启动失败: " + e.getMessage(),
+ "错误",
+ JOptionPane.ERROR_MESSAGE);
+ e.printStackTrace();
+ }
+ }
+ });
+ }
+}
\ No newline at end of file
diff --git a/src/View/MainFrame.java b/src/View/MainFrame.java
new file mode 100644
index 0000000..51ed72a
--- /dev/null
+++ b/src/View/MainFrame.java
@@ -0,0 +1,731 @@
+package View;
+
+import Service.User_service;
+import Service.Exam_service;
+import Base.Exam_result;
+import Base.Question;
+
+import javax.swing.*;
+import java.awt.*;
+import java.util.List;
+
+public class MainFrame extends JFrame {
+ private final User_service userService;
+ private Exam_service examService;
+ private CardLayout cardLayout;
+ private JPanel mainPanel;
+ private String currentUserId;
+
+ // UI组件字段
+ private JTextField loginIdField;
+ private JPasswordField loginPasswordField;
+ private JTextField regEmailField;
+ private JTextField regCodeField;
+ private JPasswordField regPasswordField;
+ private JPasswordField regConfirmPasswordField;
+ private JTextField regUserIdField;
+ private JLabel questionLabel;
+ private JRadioButton[] optionButtons;
+ private ButtonGroup optionGroup;
+ private JLabel questionNumberLabel;
+ private JButton prevButton;
+ private JButton nextButton;
+ private JButton submitButton;
+ private JLabel resultLabel;
+
+ public MainFrame() {
+ userService = new User_service();
+ initializeUI();
+ setTitle("数学学习系统");
+ setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+ setSize(800, 600);
+ setLocationRelativeTo(null);
+ }
+
+ private void initializeUI() {
+ cardLayout = new CardLayout();
+ mainPanel = new JPanel(cardLayout);
+
+ createLoginPanel();
+ createRegisterPanel();
+ createGradeSelectionPanel();
+ createExamPanel();
+ createResultPanel();
+ createWrongQuestionsPanel(); // 新增错题面板
+ createPasswordChangePanel();
+
+ add(mainPanel);
+ showLoginPanel();
+ }
+
+ private void createLoginPanel() {
+ JPanel panel = new JPanel(new BorderLayout(10, 10));
+ panel.setBorder(BorderFactory.createEmptyBorder(50, 100, 50, 100));
+
+ JLabel titleLabel = new JLabel("数学学习系统", JLabel.CENTER);
+ titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 24));
+ panel.add(titleLabel, BorderLayout.NORTH);
+
+ JPanel formPanel = new JPanel(new GridLayout(3, 2, 15, 15));
+ formPanel.setBorder(BorderFactory.createEmptyBorder(30, 50, 30, 50));
+
+ formPanel.add(new JLabel("用户名:", JLabel.CENTER));
+ loginIdField = new JTextField();
+ formPanel.add(loginIdField);
+
+ formPanel.add(new JLabel("密码:", JLabel.CENTER));
+ loginPasswordField = new JPasswordField();
+ formPanel.add(loginPasswordField);
+
+ panel.add(formPanel, BorderLayout.CENTER);
+
+ JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
+
+ JButton loginButton = createStyledButton("登录");
+ loginButton.addActionListener(e -> login());
+ buttonPanel.add(loginButton);
+
+ JButton registerButton = createStyledButton("注册账号");
+ registerButton.addActionListener(e -> showRegisterPanel());
+ buttonPanel.add(registerButton);
+
+ JButton exitButton = createStyledButton("退出");
+ exitButton.addActionListener(e -> exitchoice());
+ buttonPanel.add(exitButton);
+
+ panel.add(buttonPanel, BorderLayout.SOUTH);
+
+ mainPanel.add(panel, "Login");
+ }
+
+ private void createRegisterPanel() {
+ JPanel panel = new JPanel(new BorderLayout(10, 10));
+ panel.setBorder(BorderFactory.createEmptyBorder(30, 80, 30, 80));
+
+ JLabel titleLabel = new JLabel("用户注册", JLabel.CENTER);
+ titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 20));
+ panel.add(titleLabel, BorderLayout.NORTH);
+
+ JPanel formPanel = new JPanel(new GridLayout(5, 2, 15, 15));
+ formPanel.setBorder(BorderFactory.createEmptyBorder(20, 50, 20, 50));
+
+ formPanel.add(new JLabel("邮箱:", JLabel.CENTER));
+ regEmailField = new JTextField();
+ formPanel.add(regEmailField);
+
+ formPanel.add(new JLabel("验证码:", JLabel.CENTER));
+ JPanel codePanel = new JPanel(new BorderLayout(5, 0));
+ regCodeField = new JTextField();
+ codePanel.add(regCodeField, BorderLayout.CENTER);
+
+ JButton sendCodeButton = new JButton("发送验证码");
+ sendCodeButton.setFont(new Font("微软雅黑", Font.PLAIN, 10));
+ sendCodeButton.addActionListener(e -> sendVerificationCode());
+ codePanel.add(sendCodeButton, BorderLayout.EAST);
+ formPanel.add(codePanel);
+
+ formPanel.add(new JLabel("密码:", JLabel.CENTER));
+ regPasswordField = new JPasswordField();
+ formPanel.add(regPasswordField);
+
+ formPanel.add(new JLabel("确认密码:", JLabel.CENTER));
+ regConfirmPasswordField = new JPasswordField();
+ formPanel.add(regConfirmPasswordField);
+
+ formPanel.add(new JLabel("用户名:", JLabel.CENTER));
+ regUserIdField = new JTextField();
+ formPanel.add(regUserIdField);
+
+ panel.add(formPanel, BorderLayout.CENTER);
+
+ JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
+
+ JButton registerButton = createStyledButton("注册");
+ registerButton.addActionListener(e -> register());
+ buttonPanel.add(registerButton);
+
+ JButton backButton = createStyledButton("返回登录");
+ backButton.addActionListener(e -> showLoginPanel());
+ buttonPanel.add(backButton);
+
+ panel.add(buttonPanel, BorderLayout.SOUTH);
+
+ mainPanel.add(panel, "Register");
+ }
+
+ private void createGradeSelectionPanel() {
+ JPanel panel = new JPanel(new BorderLayout(10, 10));
+ panel.setBorder(BorderFactory.createEmptyBorder(50, 100, 50, 100));
+
+ JLabel titleLabel = new JLabel("选择学习阶段", JLabel.CENTER);
+ titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 24));
+ panel.add(titleLabel, BorderLayout.NORTH);
+
+ JPanel gradePanel = new JPanel(new GridLayout(4, 1, 20, 20));
+ gradePanel.setBorder(BorderFactory.createEmptyBorder(50, 100, 50, 100));
+
+ JButton primaryButton = createGradeButton("小学");
+ primaryButton.addActionListener(e -> startExam("小学"));
+ gradePanel.add(primaryButton);
+
+ JButton juniorButton = createGradeButton("初中");
+ juniorButton.addActionListener(e -> startExam("初中"));
+ gradePanel.add(juniorButton);
+
+ JButton seniorButton = createGradeButton("高中");
+ seniorButton.addActionListener(e -> startExam("高中"));
+ gradePanel.add(seniorButton);
+
+ panel.add(gradePanel, BorderLayout.CENTER);
+
+ JPanel bottomPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
+
+ JButton changePasswordButton = createStyledButton("修改密码");
+ changePasswordButton.addActionListener(e -> showPasswordChangePanel());
+ bottomPanel.add(changePasswordButton);
+
+ // 新增：删除账号按钮
+ JButton deleteAccountButton = createStyledButton("删除账号");
+ deleteAccountButton.setBackground(new Color(220, 20, 60)); // 红色背景提示危险操作
+ deleteAccountButton.addActionListener(e -> deleteAccount());
+ bottomPanel.add(deleteAccountButton);
+
+ JButton logoutButton = createStyledButton("退出登录");
+ logoutButton.addActionListener(e -> logout());
+ bottomPanel.add(logoutButton);
+
+ panel.add(bottomPanel, BorderLayout.SOUTH);
+
+ mainPanel.add(panel, "GradeSelection");
+ }
+ // 新增：删除当前账号功能
+ private void deleteAccount() {
+ // 简单确认对话框
+ int result = JOptionPane.showConfirmDialog(
+ this,
+ "确定要删除当前账号吗？\n用户名：" + currentUserId + "\n此操作不可恢复！",
+ "确认删除账号",
+ JOptionPane.YES_NO_OPTION,
+ JOptionPane.WARNING_MESSAGE
+ );
+
+ if (result == JOptionPane.YES_OPTION) {
+ // 直接使用当前用户名作为邮箱（根据您的系统设计，用户名可能就是邮箱）
+ // 或者让用户输入邮箱确认
+ String userEmail = JOptionPane.showInputDialog(
+ this,
+ "请输入您的邮箱进行确认：",
+ "确认删除",
+ JOptionPane.QUESTION_MESSAGE
+ );
+
+ if (userEmail != null && !userEmail.trim().isEmpty()) {
+ // 调用User_service的Unregister函数删除账号
+ String deleteResult = userService.Unregister(userEmail.trim());
+
+ if (deleteResult.equals("删除成功")) {
+ JOptionPane.showMessageDialog(this, "账号删除成功！");
+ // 清除当前用户信息并返回登录界面
+ currentUserId = null;
+ examService = null;
+ showLoginPanel();
+ } else {
+ JOptionPane.showMessageDialog(this, "删除失败：" + deleteResult);
+ }
+ }
+ }
+ }
+
+ private void createExamPanel() {
+ JPanel panel = new JPanel(new BorderLayout(10, 10));
+ panel.setBorder(BorderFactory.createEmptyBorder(20, 40, 20, 40));
+
+ // 顶部信息栏
+ JPanel topPanel = new JPanel(new BorderLayout());
+ questionNumberLabel = new JLabel("", JLabel.LEFT);
+ questionNumberLabel.setFont(new Font("微软雅黑", Font.BOLD, 16));
+
+ topPanel.add(questionNumberLabel, BorderLayout.WEST);
+ panel.add(topPanel, BorderLayout.NORTH);
+
+ // 题目区域
+ JPanel questionPanel = new JPanel(new BorderLayout(10, 20));
+ questionPanel.setBorder(BorderFactory.createEmptyBorder(30, 50, 30, 50));
+
+ questionLabel = new JLabel("", JLabel.CENTER);
+ questionLabel.setFont(new Font("微软雅黑", Font.PLAIN, 18));
+ questionPanel.add(questionLabel, BorderLayout.NORTH);
+
+ // 选项区域
+ JPanel optionsPanel = new JPanel(new GridLayout(4, 1, 10, 10));
+ optionsPanel.setBorder(BorderFactory.createEmptyBorder(20, 100, 20, 100));
+
+ optionButtons = new JRadioButton[4];
+ optionGroup = new ButtonGroup();
+
+ for (int i = 0; i < 4; i++) {
+ optionButtons[i] = new JRadioButton();
+ optionButtons[i].setFont(new Font("微软雅黑", Font.PLAIN, 16));
+ optionGroup.add(optionButtons[i]);
+ optionsPanel.add(optionButtons[i]);
+ }
+
+ questionPanel.add(optionsPanel, BorderLayout.CENTER);
+ panel.add(questionPanel, BorderLayout.CENTER);
+
+ // 导航按钮区域
+ JPanel navPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
+
+ prevButton = createStyledButton("上一题");
+ prevButton.addActionListener(e -> goToPreviousQuestion());
+ navPanel.add(prevButton);
+
+ nextButton = createStyledButton("下一题");
+ nextButton.addActionListener(e -> goToNextQuestion());
+ navPanel.add(nextButton);
+
+ submitButton = createStyledButton("提交试卷");
+ submitButton.addActionListener(e -> submitExam());
+ navPanel.add(submitButton);
+
+ panel.add(navPanel, BorderLayout.SOUTH);
+
+ mainPanel.add(panel, "Exam");
+ }
+
+ private void createResultPanel() {
+ JPanel panel = new JPanel(new BorderLayout(10, 10));
+ panel.setBorder(BorderFactory.createEmptyBorder(50, 100, 50, 100));
+
+ resultLabel = new JLabel("", JLabel.CENTER);
+ resultLabel.setFont(new Font("微软雅黑", Font.BOLD, 24));
+ panel.add(resultLabel, BorderLayout.CENTER);
+
+ JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 30, 20));
+
+ // 新增查看错题按钮
+ JButton reviewButton = createStyledButton("查看错题");
+ reviewButton.addActionListener(e -> showWrongQuestions());
+ buttonPanel.add(reviewButton);
+
+ JButton continueButton = createStyledButton("继续做题");
+ continueButton.addActionListener(e -> showGradeSelectionPanel());
+ buttonPanel.add(continueButton);
+
+ JButton exitButton = createStyledButton("退出程序");
+ exitButton.addActionListener(e -> System.exit(0));
+ buttonPanel.add(exitButton);
+
+ panel.add(buttonPanel, BorderLayout.SOUTH);
+
+ mainPanel.add(panel, "Result");
+ }
+
+ private void createWrongQuestionsPanel() {
+ JPanel panel = new JPanel(new BorderLayout(10, 10));
+ panel.setBorder(BorderFactory.createEmptyBorder(20, 40, 20, 40));
+
+ // 标题
+ JLabel titleLabel = new JLabel("错题回顾", JLabel.CENTER);
+ titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 20));
+ panel.add(titleLabel, BorderLayout.NORTH);
+
+ // 错题内容区域（使用滚动面板）
+ JTextArea wrongQuestionsArea = new JTextArea();
+ wrongQuestionsArea.setFont(new Font("微软雅黑", Font.PLAIN, 14));
+ wrongQuestionsArea.setEditable(false);
+ wrongQuestionsArea.setLineWrap(true);
+ wrongQuestionsArea.setWrapStyleWord(true);
+
+ JScrollPane scrollPane = new JScrollPane(wrongQuestionsArea);
+ scrollPane.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
+ panel.add(scrollPane, BorderLayout.CENTER);
+
+ // 存储错题文本区域引用
+ panel.putClientProperty("wrongQuestionsArea", wrongQuestionsArea);
+
+ // 返回按钮
+ JPanel bottomPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
+ JButton backButton = createStyledButton("返回成绩");
+ backButton.addActionListener(e -> showResultPanel());
+ bottomPanel.add(backButton);
+
+ panel.add(bottomPanel, BorderLayout.SOUTH);
+
+ mainPanel.add(panel, "WrongQuestions");
+ }
+
+ private void createPasswordChangePanel() {
+ JPanel panel = new JPanel(new BorderLayout(10, 10));
+ panel.setBorder(BorderFactory.createEmptyBorder(50, 100, 50, 100));
+
+ JLabel titleLabel = new JLabel("修改密码", JLabel.CENTER);
+ titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 20));
+ panel.add(titleLabel, BorderLayout.NORTH);
+
+ JPanel formPanel = new JPanel(new GridLayout(4, 2, 15, 15));
+ formPanel.setBorder(BorderFactory.createEmptyBorder(30, 80, 30, 80));
+
+ formPanel.add(new JLabel("邮箱:", JLabel.RIGHT));
+ JTextField emailField = new JTextField();
+ formPanel.add(emailField);
+
+ formPanel.add(new JLabel("原密码:", JLabel.RIGHT));
+ JPasswordField oldPasswordField = new JPasswordField();
+ formPanel.add(oldPasswordField);
+
+ formPanel.add(new JLabel("新密码:", JLabel.RIGHT));
+ JPasswordField newPasswordField = new JPasswordField();
+ formPanel.add(newPasswordField);
+
+ formPanel.add(new JLabel("确认新密码:", JLabel.RIGHT));
+ JPasswordField confirmPasswordField = new JPasswordField();
+ formPanel.add(confirmPasswordField);
+
+ panel.add(formPanel, BorderLayout.CENTER);
+
+ JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
+
+ JButton changeButton = createStyledButton("确认修改");
+ changeButton.addActionListener(e -> {
+ String email = emailField.getText();
+ String oldPassword = new String(oldPasswordField.getPassword());
+ String newPassword = new String(newPasswordField.getPassword());
+ String confirmPassword = new String(confirmPasswordField.getPassword());
+ changePassword(email, oldPassword, newPassword, confirmPassword);
+ });
+ buttonPanel.add(changeButton);
+
+ JButton backButton = createStyledButton("返回");
+ backButton.addActionListener(e -> showGradeSelectionPanel());
+ buttonPanel.add(backButton);
+
+ panel.add(buttonPanel, BorderLayout.SOUTH);
+
+ mainPanel.add(panel, "PasswordChange");
+ }
+
+ private JButton createStyledButton(String text) {
+ JButton button = new JButton(text);
+ button.setFont(new Font("微软雅黑", Font.BOLD, 14));
+ button.setFocusPainted(false);
+ button.setBorder(BorderFactory.createEmptyBorder(10, 20, 10, 20));
+ return button;
+ }
+
+ private JButton createGradeButton(String text) {
+ JButton button = new JButton(text);
+ button.setFont(new Font("微软雅黑", Font.BOLD, 18));
+ button.setFocusPainted(false);
+ button.setBorder(BorderFactory.createEmptyBorder(20, 0, 20, 0));
+ return button;
+ }
+
+ // 界面显示方法
+ private void showLoginPanel() {
+ loginIdField.setText("");
+ loginPasswordField.setText("");
+ cardLayout.show(mainPanel, "Login");
+ }
+
+ private void showRegisterPanel() {
+ regEmailField.setText("");
+ regCodeField.setText("");
+ regPasswordField.setText("");
+ regConfirmPasswordField.setText("");
+ regUserIdField.setText("");
+ cardLayout.show(mainPanel, "Register");
+ }
+
+ private void showGradeSelectionPanel() {
+ cardLayout.show(mainPanel, "GradeSelection");
+ }
+
+ private void showPasswordChangePanel() {
+ cardLayout.show(mainPanel, "PasswordChange");
+ }
+
+ private void showExamPanel() {
+ cardLayout.show(mainPanel, "Exam");
+ }
+
+ private void showResultPanel() {
+ cardLayout.show(mainPanel, "Result");
+ }
+
+ private void showWrongQuestionsPanel() {
+ cardLayout.show(mainPanel, "WrongQuestions");
+ }
+
+ // 业务逻辑方法
+ private void login() {
+ String id = loginIdField.getText().trim();
+ String password = new String(loginPasswordField.getPassword());
+
+ if (id.isEmpty() || password.isEmpty()) {
+ JOptionPane.showMessageDialog(this, "请输入用户名和密码");
+ return;
+ }
+
+ String result = userService.login(id, password);
+ if (result.equals("登陆成功")) {
+ currentUserId = id;
+ showGradeSelectionPanel();
+ } else {
+ JOptionPane.showMessageDialog(this, result);
+ }
+ }
+
+ private void sendVerificationCode() {
+ String email = regEmailField.getText().trim();
+ if (email.isEmpty()) {
+ JOptionPane.showMessageDialog(this, "请输入邮箱地址");
+ return;
+ }
+
+ String result = userService.register(email);
+ JOptionPane.showMessageDialog(this, result);
+ }
+
+ private void register() {
+ String email = regEmailField.getText().trim();
+ String code = regCodeField.getText().trim();
+ String password = new String(regPasswordField.getPassword());
+ String confirmPassword = new String(regConfirmPasswordField.getPassword());
+ String userId = regUserIdField.getText().trim();
+
+ if (email.isEmpty() || code.isEmpty() || password.isEmpty() || userId.isEmpty()) {
+ JOptionPane.showMessageDialog(this, "请填写所有字段");
+ return;
+ }
+
+ if (!password.equals(confirmPassword)) {
+ JOptionPane.showMessageDialog(this, "两次输入的密码不一致");
+ return;
+ }
+
+ String result = userService.check_register(email, code, password, userId);
+ JOptionPane.showMessageDialog(this, result);
+
+ if (result.equals("注册成功")) {
+ showLoginPanel();
+ }
+ }
+
+ private void startExam(String gradeType) {
+ String input = JOptionPane.showInputDialog(this,
+ "请输入" + gradeType + "题目数量:", "题目数量", JOptionPane.QUESTION_MESSAGE);
+
+ if (input == null) return;
+
+ try {
+ int numQuestions = Integer.parseInt(input.trim());
+ if (numQuestions < 10 || numQuestions > 30) {
+ JOptionPane.showMessageDialog(this, "题目数量范围是10-30");
+ return;
+ }
+
+ examService = new Exam_service(numQuestions, gradeType, currentUserId);
+ showCurrentQuestion();
+ showExamPanel();
+
+ } catch (NumberFormatException e) {
+ JOptionPane.showMessageDialog(this, "请输入有效的数字");
+ }
+ }
+
+ private void showCurrentQuestion() {
+ Question question = examService.get_now_question();
+ if (question != null) {
+ int currentIndex = examService.get_now_index();
+ int totalQuestions = examService.get_paper().size();
+
+ questionNumberLabel.setText(String.format("第 %d 题 / 共 %d 题",
+ currentIndex + 1, totalQuestions));
+
+ questionLabel.setText("" +
+ question.toString() + "
");
+
+ for (int i = 0; i < 4; i++) {
+ String optionText = question.getOptions(i);
+ optionButtons[i].setText((char)('A' + i) + ": " + optionText);
+ }
+
+ Integer userAnswer = examService.get_user_answer(currentIndex);
+ optionGroup.clearSelection();
+ if (userAnswer != null && userAnswer >= 0 && userAnswer < 4) {
+ optionButtons[userAnswer].setSelected(true);
+ }
+
+ updateNavigationButtons();
+ }
+ }
+
+ private void updateNavigationButtons() {
+ int currentIndex = examService.get_now_index();
+ int totalQuestions = examService.get_paper().size();
+
+ prevButton.setEnabled(currentIndex > 0);
+ nextButton.setEnabled(currentIndex < totalQuestions - 1);
+ submitButton.setEnabled(currentIndex == totalQuestions - 1);
+ }
+
+ private void goToPreviousQuestion() {
+ if (examService.pre_one()) {
+ showCurrentQuestion();
+ }
+ }
+
+ private void goToNextQuestion() {
+ int selectedOption = getSelectedOption();
+ if (selectedOption == -1) {
+ JOptionPane.showMessageDialog(this, "请选择一个答案");
+ return;
+ }
+
+ boolean hasNext = examService.next_one(selectedOption);
+ if (hasNext) {
+ showCurrentQuestion();
+ } else {
+ showExamResult();
+ }
+ }
+
+ private void submitExam() {
+ int selectedOption = getSelectedOption();
+ if (selectedOption == -1) {
+ JOptionPane.showMessageDialog(this, "请选择一个答案");
+ return;
+ }
+
+ examService.next_one(selectedOption);
+ showExamResult();
+ }
+
+ private int getSelectedOption() {
+ for (int i = 0; i < 4; i++) {
+ if (optionButtons[i].isSelected()) {
+ return i;
+ }
+ }
+ return -1;
+ }
+
+ private void showExamResult() {
+ Exam_result result = examService.calculate_result();
+
+ String resultText = String.format(
+ "" +
+ "
考试完成！
" +
+ "
%s数学测试
" +
+ "
总题数: %d
" +
+ "
答对题数: %d
" +
+ "
得分: %.1f
" +
+ "
用时: %s
" +
+ "
正确率: %s
" +
+ "