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Math_Learning
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Arno 2 months ago committed by Gitea
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commit ad00c89721
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38
src/Math_learning_app.java
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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();
}
}
});
}
}

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src/View/MainFrame.java
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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("<html><div style='text-align: center; font-size: 16px;'>" +
question.toString() + "</div></html>");
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(
"<html><div style='text-align: center;'>" +
"<p>考试完成！</p>" +
"<p>%s数学测试</p>" +
"<p>总题数: %d</p>" +
"<p>答对题数: %d</p>" +
"<p>得分: %.1f</p>" +
"<p>用时: %s</p>" +
"<p>正确率: %s</p>" +
"</div></html>",
result.getExamType(),
result.getTotalQuestions(),
result.getCorrectAnswers(),
result.getScore(),
result.get_time(),
result.getCorrectRate()
);
resultLabel.setText(resultText);
showResultPanel();
}
// 新增：查看错题功能
// 修正：查看错题功能 - 简洁显示
private void showWrongQuestions() {
// 获取考试结果
Exam_result result = examService.calculate_result();
java.util.List<Integer> wrongQuestionIndices = result.getWrongQuestions();
if (wrongQuestionIndices.isEmpty()) {
JOptionPane.showMessageDialog(this, "恭喜！本次考试没有错题！");
return;
}
// 获取错题面板和文本区域
JPanel wrongQuestionsPanel = (JPanel) mainPanel.getComponent(5); // 第6个面板是错题面板
JTextArea wrongQuestionsArea = (JTextArea) ((JScrollPane) wrongQuestionsPanel.getComponent(1)).getViewport().getView();
// 构建错题显示内容
StringBuilder sb = new StringBuilder();
sb.append("本次考试共有 ").append(wrongQuestionIndices.size()).append(" 道错题：\n\n");
java.util.ArrayList<Question> paper = examService.get_paper();
for (int i = 0; i < wrongQuestionIndices.size(); i++) {
int questionIndex = wrongQuestionIndices.get(i);
Question question = paper.get(questionIndex);
// 只显示一个题号
sb.append("第 ").append(questionIndex + 1).append(" 题：");
sb.append(question.toString()).append("\n");
// 显示所有选项，在正确答案后打勾
sb.append("选项：\n");
for (int j = 0; j < 4; j++) {
char optionChar = (char) ('A' + j);
sb.append(" ").append(optionChar).append(". ").append(question.getOptions(j));
// 标记正确答案
if (question.getOptions(j).equals(question.getAnswer())) {
sb.append(" √");
}
// 标记用户选择的错误答案
Integer userAnswer = examService.get_user_answer(questionIndex);
if (userAnswer != null && userAnswer == j && !question.getOptions(j).equals(question.getAnswer())) {
sb.append(" X");
}
sb.append("\n");
}
sb.append("\n");
sb.append("-".repeat(50)).append("\n\n");
}
wrongQuestionsArea.setText(sb.toString());
showWrongQuestionsPanel();
}
private void changePassword(String email, String oldPassword, String newPassword, String confirmPassword) {
if (email.isEmpty() || oldPassword.isEmpty() || newPassword.isEmpty()) {
JOptionPane.showMessageDialog(this, "请填写所有字段");
return;
}
if (!newPassword.equals(confirmPassword)) {
JOptionPane.showMessageDialog(this, "两次输入的新密码不一致");
return;
}
String result = userService.change_pwd(email, oldPassword, newPassword);
JOptionPane.showMessageDialog(this, result);
if (result.equals("修改成功")) {
showGradeSelectionPanel();
}
}
private void logout() {
currentUserId = null;
examService = null;
showLoginPanel();
}
public void exitchoice(){
System.exit(0);
}
// 主函数
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
new MainFrame().setVisible(true);
});
}
}
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