修复进入各页面时显示退出时信息的bug

src/main/java/com/mathapp/MathApp.java

@@ -25,6 +25,11 @@ public class MathApp extends JFrame {
   public static final String RESULTS_PANEL = "ResultsPanel";
   public static final String CHANGE_PASSWORD_PANEL = "ChangePasswordPanel";
 
+  private LoginPanel loginPanel;
+  private RegisterPanel registerPanel;
+  private MainMenuPanel mainMenuPanel;
+  private ChangePasswordPanel changePasswordPanel;
+
   public MathApp() {
     initUI();
   }
@@ -39,11 +44,16 @@ public class MathApp extends JFrame {
     cardLayout = new CardLayout();
     mainPanel = new JPanel(cardLayout);
 
+    loginPanel = new LoginPanel(this);
+    registerPanel = new RegisterPanel(this);
+    mainMenuPanel = new MainMenuPanel(this);
+    changePasswordPanel = new ChangePasswordPanel(this);
+
     // 添加所有静态面板
-    mainPanel.add(new LoginPanel(this), LOGIN_PANEL);
-    mainPanel.add(new RegisterPanel(this), REGISTER_PANEL);
-    mainPanel.add(new MainMenuPanel(this), MAIN_MENU_PANEL);
-    mainPanel.add(new ChangePasswordPanel(this), CHANGE_PASSWORD_PANEL);
+    mainPanel.add(loginPanel, LOGIN_PANEL);
+    mainPanel.add(registerPanel, REGISTER_PANEL);
+    mainPanel.add(mainMenuPanel, MAIN_MENU_PANEL);
+    mainPanel.add(changePasswordPanel, CHANGE_PASSWORD_PANEL);
 
     add(mainPanel);
   }
@@ -53,6 +63,23 @@ public class MathApp extends JFrame {
    * @param panelName 要显示的面板名称
    */
   public void showPanel(String panelName) {
+    switch (panelName) {
+      case LOGIN_PANEL:
+        loginPanel.resetPanel();
+        break;
+      case REGISTER_PANEL:
+        registerPanel.resetPanel();
+        break;
+      case MAIN_MENU_PANEL :
+        mainMenuPanel.resetPanel();
+        break;
+      case CHANGE_PASSWORD_PANEL :
+        changePasswordPanel.resetPanel();
+        break;
+      default:
+        break;
+    }
+
     cardLayout.show(mainPanel, panelName);
   }
 

src/main/java/com/mathapp/panels/ChangePasswordPanel.java

@@ -82,6 +82,12 @@ public class ChangePasswordPanel extends JPanel {
     backButton.addActionListener(e -> app.showPanel(MathApp.MAIN_MENU_PANEL));
   }
 
+  public void resetPanel() {
+    oldPasswordField.setText("");
+    newPasswordField.setText("");
+    confirmNewPasswordField.setText("");
+  }
+
   private void handleChangePassword() {
     String email = app.getCurrentUserEmail();
     if (email == null) {

src/main/java/com/mathapp/panels/LoginPanel.java

@@ -73,6 +73,11 @@ public class LoginPanel extends JPanel {
     registerButton.addActionListener(e -> app.showPanel(MathApp.REGISTER_PANEL));
   }
 
+  public void resetPanel() {
+    emailField.setText("");
+    passwordField.setText("");
+  }
+
   private void handleLogin() {
     String email = emailField.getText().trim();
     String password = new String(passwordField.getPassword());
@@ -83,7 +88,7 @@ public class LoginPanel extends JPanel {
     }
 
     User user = DataPersistence.findUserByEmail(email);
-    if (user != null && user.verifyPassword(password)||true) {
+    if (user != null && user.verifyPassword(password)) {
       app.setCurrentUserEmail(email);
       app.showPanel(MathApp.MAIN_MENU_PANEL);
     } else {

src/main/java/com/mathapp/panels/MainMenuPanel.java

@@ -80,6 +80,11 @@ public class MainMenuPanel extends JPanel {
     changePasswordButton.addActionListener(e -> app.showPanel(MathApp.CHANGE_PASSWORD_PANEL));
   }
 
+  public void resetPanel() {
+    levelGroup.clearSelection();
+    questionCountField.setText("10");
+  }
+
   private void handleStart() {
     String level = levelGroup.getSelection().getActionCommand();
     int count;

src/main/java/com/mathapp/panels/RegisterPanel.java

@@ -77,7 +77,7 @@ public class RegisterPanel extends JPanel {
     backButton.addActionListener(e -> app.showPanel(MathApp.LOGIN_PANEL));
   }
 
-  private void resetPanel() {
+  public void resetPanel() {
     emailField.setText("");
     codeField.setText("");
 
@@ -151,9 +151,6 @@ public class RegisterPanel extends JPanel {
     
     // 验证成功，跳转到设置密码页面
     app.showSetPasswordPanel(emailField.getText().trim());
-
-    // 跳转设置密码页面前重置注册面板状态
-    resetPanel();
   }
 
   private void startCooldownTimer() {