经讨论后认为较完善

src/view/ExamView.java

@@ -1,7 +1,7 @@
 package view;
 
 import controller.NavigationController;
-import controller.NavigationService;  // 新增导入
+import controller.NavigationService;
 import controller.QuestionController;
 import model.Question;
 
@@ -25,7 +25,7 @@ import java.awt.event.ItemListener;
 
 public class ExamView extends JFrame {
     private QuestionController questionController;
-    private NavigationService navigationService;  // 新增
+    private NavigationService navigationService;
     private JLabel questionLabel;
     private JLabel progressLabel;
     private ButtonGroup optionGroup;
@@ -37,7 +37,7 @@ public class ExamView extends JFrame {
 
     public ExamView() {
         questionController = new QuestionController();
-        navigationService = NavigationController.getInstance();  // 新增
+        navigationService = NavigationController.getInstance();
         initializeUI();
     }
 

src/view/MainView.java

@@ -1,7 +1,7 @@
 package view;
 
 import controller.NavigationController;
-import controller.NavigationService;  // 新增导入
+import controller.NavigationService;
 import controller.UserController;
 import model.User;
 
@@ -24,11 +24,11 @@ public class MainView extends JFrame {
     private JComboBox<String> difficultyComboBox;
     private JTextField countField;
     private User currentUser; // 保存当前登录用户
-    private NavigationService navigationService;  // 新增
+    private NavigationService navigationService;
 
     public MainView(User user) {
         this.currentUser = user;
-        this.navigationService = NavigationController.getInstance();  // 新增
+        this.navigationService = NavigationController.getInstance();
         initializeUI();
     }
 
@@ -73,7 +73,7 @@ public class MainView extends JFrame {
 
         mainPanel.add(formPanel, BorderLayout.CENTER);
 
-        // Button panel - 添加修改密码按钮
+
         JPanel buttonPanel = new JPanel(new FlowLayout());
         JButton changePasswordButton = new JButton("修改密码");
         JButton logoutButton = new JButton("退出登录");

src/view/RegisterView.java

@@ -1,7 +1,7 @@
 package view;
 
 import controller.NavigationController;
-import controller.NavigationService;  // 新增导入
+import controller.NavigationService;
 import controller.UserController;
 import model.User;
 
@@ -21,7 +21,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 
 public class RegisterView extends JFrame {
-    private JTextField usernameField;    // 新增：用户名输入框
+    private JTextField usernameField;    // 用户名输入框
     private JTextField emailField;
     private JTextField codeField;
     private JPasswordField passwordField;
@@ -39,7 +39,7 @@ public class RegisterView extends JFrame {
     private void initializeUI() {
         setTitle("数学学习软件 - 注册");
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-        setSize(550, 500);  // 增加高度以容纳用户名字段
+        setSize(550, 500);
         setLocationRelativeTo(null);
         setResizable(false);
 

src/view/ResultView.java

@@ -1,7 +1,7 @@
 package view;
 
 import controller.NavigationController;
-import controller.NavigationService;  // 新增导入
+import controller.NavigationService;
 
 import javax.swing.JFrame;
 import javax.swing.JPanel;
@@ -18,7 +18,7 @@ import java.awt.event.ActionListener;
 public class ResultView extends JFrame {
     private JLabel scoreLabel;
     private JLabel percentageLabel;
-    private NavigationService navigationService;  // 新增
+    private NavigationService navigationService;
 
     public ResultView() {
         navigationService = NavigationController.getInstance();  // 新增