From bc0e65dbeb09ec6d969869190540d5898e8ea46e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A8=E5=8D=9A=E6=96=87?=
 <15549487+FX_YBW@user.noreply.gitee.com>
Date: Sat, 11 Oct 2025 23:18:26 +0800
Subject: [PATCH] =?UTF-8?q?v2.2=20=E5=90=8E=E7=AB=AF=E4=BB=A3=E7=A0=81chec?=
 =?UTF-8?q?kstyle=E6=A3=80=E6=9F=A5=E5=AE=8C=E6=AF=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../wsf/mathapp/view/LevelSelectionView.java  | 254 +++++-------------
 .../ybw/mathapp/service/AdvancedCaculate.java |  10 +-
 .../service/MultipleChoiceGenerator.java      |  11 +-
 .../com/ybw/mathapp/util/EmailService.java    |  68 ++---
 4 files changed, 111 insertions(+), 232 deletions(-)

diff --git a/src/main/java/com/wsf/mathapp/view/LevelSelectionView.java b/src/main/java/com/wsf/mathapp/view/LevelSelectionView.java
index b35c1a3..b9a7092 100644
--- a/src/main/java/com/wsf/mathapp/view/LevelSelectionView.java
+++ b/src/main/java/com/wsf/mathapp/view/LevelSelectionView.java
@@ -16,10 +16,6 @@ import javafx.scene.text.Font;
 import javafx.scene.text.FontWeight;
 import javafx.scene.text.Text;
 
-/**
- * 级别选择视图类，提供用户选择题目难度级别的界面.
- * 包含小学、初中、高中三个难度级别的选择按钮.
- */
 public class LevelSelectionView {
   private Scene scene;
   private final SceneManager sceneManager;
@@ -29,20 +25,12 @@ public class LevelSelectionView {
   private Label usernameLabel;
   private Text avatarText;
 
-  /**
-   * 构造函数，初始化级别选择视图.
-   *
-   * @param sceneManager 场景管理器，用于界面导航.
-   */
   public LevelSelectionView(SceneManager sceneManager) {
     this.sceneManager = sceneManager;
     this.currentUsername = sceneManager.getCurrentUserName();
     createScene();
   }
 
-  /**
-   * 创建主场景，包含用户信息栏和级别选择内容.
-   */
   private void createScene() {
     // 创建主容器
     VBox mainContainer = new VBox();
@@ -59,45 +47,31 @@ public class LevelSelectionView {
     scene = new Scene(mainContainer, 450, 550);
   }
 
-  /**
-   * 创建用户信息栏，包含用户头像和用户名显示.
-   *
-   * @return HBox 用户信息栏布局容器.
-   */
   private HBox createUserInfoBar() {
     HBox userInfoBar = new HBox(15);
     userInfoBar.setAlignment(Pos.CENTER_LEFT);
     userInfoBar.setPadding(new Insets(0, 0, 30, 0));
-    userInfoBar.setStyle("-fx-border-color: #e0e0e0; "
-        + "-fx-border-width: 0 0 1 0; -fx-padding: 0 0 15 0;");
-    // 用户名标签
-    usernameLabel = new Label(currentUsername != null ? currentUsername : "用户");
-    usernameLabel.setFont(Font.font("Arial", FontWeight.BOLD, 16));
-    usernameLabel.setStyle("-fx-text-fill: #2c3e50;");
-    // 间隔
-    Region spacer = new Region();
-    HBox.setHgrow(spacer, Priority.ALWAYS);
-    // 创建头像容器
-    VBox avatarContainer = createAvatarContainer();
-    userInfoBar.getChildren().addAll(avatarContainer, usernameLabel, spacer);
-    return userInfoBar;
-  }
+    userInfoBar.setStyle("-fx-border-color: #e0e0e0; -fx-border-width: 0 0 1 0; -fx-padding: 0 0 15 0;");
 
-  /**
-   * 创建头像容器，包含圆形头像背景和用户首字母.
-   *
-   * @return VBox 头像容器布局.
-   */
-  private VBox createAvatarContainer() {
+    // 创建圆形头像容器
     VBox avatarContainer = new VBox();
     avatarContainer.setAlignment(Pos.CENTER);
     avatarContainer.setPrefSize(50, 50);
+
+    // 创建圆形头像背景
+    Circle avatarCircle = new Circle(22);
+    avatarCircle.setFill(Color.web("#4CAF50")); // 统一的绿色背景
+    avatarCircle.setStroke(Color.WHITE);
+    avatarCircle.setStrokeWidth(2);
+
+    // 添加阴影效果
+    avatarCircle.setStyle("-fx-effect: dropshadow(gaussian, rgba(0,0,0,0.2), 5, 0.3, 2, 2);");
+
     // 添加首字母文本
     avatarText = new Text(getFirstLetter());
     avatarText.setFill(Color.WHITE);
     avatarText.setFont(Font.font("Arial", FontWeight.BOLD, 16));
-    // 创建圆形头像背景
-    Circle avatarCircle = createAvatarCircle();
+
     // 使用StackPane将文本放在圆形中心
     javafx.scene.layout.StackPane avatarStack = new javafx.scene.layout.StackPane();
     avatarStack.getChildren().addAll(avatarCircle, avatarText);
@@ -105,190 +79,101 @@ public class LevelSelectionView {
     avatarStack.setAlignment(Pos.CENTER);
 
     avatarContainer.getChildren().add(avatarStack);
-    return avatarContainer;
-  }
 
-  /**
-   * 创建圆形头像背景.
-   *
-   * @return Circle 圆形头像背景对象.
-   */
-  private Circle createAvatarCircle() {
-    Circle avatarCircle = new Circle(22);
-    avatarCircle.setFill(Color.web("#4CAF50")); // 统一的绿色背景
-    avatarCircle.setStroke(Color.WHITE);
-    avatarCircle.setStrokeWidth(2);
+    // 用户名标签
+    usernameLabel = new Label(currentUsername != null ? currentUsername : "用户");
+    usernameLabel.setFont(Font.font("Arial", FontWeight.BOLD, 16));
+    usernameLabel.setStyle("-fx-text-fill: #2c3e50;");
 
-    // 添加阴影效果
-    avatarCircle.setStyle("-fx-effect: dropshadow(gaussian, rgba(0,0,0,0.2), 5, 0.3, 2, 2);");
-    return avatarCircle;
+    // 间隔
+    Region spacer = new Region();
+    HBox.setHgrow(spacer, Priority.ALWAYS);
+
+    userInfoBar.getChildren().addAll(avatarContainer, usernameLabel, spacer);
+
+    return userInfoBar;
   }
 
-  /**
-   * 创建级别选择内容区域，包含标题和级别选择按钮.
-   *
-   * @return VBox 级别选择内容区域布局容器.
-   */
   private VBox createSelectionContent() {
     VBox selectionContent = new VBox(25);
     selectionContent.setPadding(new Insets(30, 20, 20, 20));
     selectionContent.setAlignment(Pos.CENTER);
 
-    // 创建标题区域
-    VBox titleSection = createTitleSection();
-
-    // 创建级别按钮区域
-    VBox levelButtonsSection = createLevelButtonsSection();
-
-    // 创建返回按钮
-    Button backButton = createBackButton();
-
-    selectionContent.getChildren().addAll(titleSection, levelButtonsSection, backButton);
-
-    return selectionContent;
-  }
-
-  /**
-   * 创建标题区域，包含主标题和副标题.
-   *
-   * @return VBox 标题区域布局容器.
-   */
-  private VBox createTitleSection() {
-    VBox titleSection = new VBox(5);
-    titleSection.setAlignment(Pos.CENTER);
-
     Label titleLabel = new Label("选择题目级别");
     titleLabel.setFont(Font.font("Arial", FontWeight.BOLD, 26));
     titleLabel.setStyle("-fx-text-fill: #2c3e50;");
 
+    // 添加副标题
     Label subtitleLabel = new Label("请选择适合您的学习级别");
     subtitleLabel.setFont(Font.font("Arial", 14));
     subtitleLabel.setStyle("-fx-text-fill: #7f8c8d; -fx-padding: 0 0 10 0;");
 
-    titleSection.getChildren().addAll(titleLabel, subtitleLabel);
-    return titleSection;
-  }
-
-  /**
-   * 创建级别按钮区域，包含三个难度级别的选择按钮.
-   *
-   * @return VBox 级别按钮区域布局容器.
-   */
-  private VBox createLevelButtonsSection() {
-    VBox levelButtonsSection = new VBox(15);
-    levelButtonsSection.setAlignment(Pos.CENTER);
-
     Button primaryButton = createLevelButton("小学题目", "#4CAF50", "#45a049");
     Button juniorButton = createLevelButton("初中题目", "#2196F3", "#1976D2");
     Button seniorButton = createLevelButton("高中题目", "#9C27B0", "#7B1FA2");
 
-    setupLevelButtonAction(primaryButton, "小学");
-    setupLevelButtonAction(juniorButton, "初中");
-    setupLevelButtonAction(seniorButton, "高中");
+    Button backButton = new Button("返回主菜单");
+    backButton.setStyle("-fx-background-color: #95a5a6; -fx-text-fill: white; -fx-font-size: 14px; -fx-background-radius: 8; -fx-padding: 8 20;");
+    backButton.setPrefSize(180, 45);
+    backButton.setOnMouseEntered(e -> backButton.setStyle("-fx-background-color: #7f8c8d; -fx-text-fill: white; -fx-font-size: 14px; -fx-background-radius: 8; -fx-padding: 8 20;"));
+    backButton.setOnMouseExited(e -> backButton.setStyle("-fx-background-color: #95a5a6; -fx-text-fill: white; -fx-font-size: 14px; -fx-background-radius: 8; -fx-padding: 8 20;"));
 
-    levelButtonsSection.getChildren().addAll(primaryButton, juniorButton, seniorButton);
-    return levelButtonsSection;
-  }
+    primaryButton.setOnAction(e -> {
+      String selectedLevel = "小学";
+      sceneManager.getQuestionCountView().setLevel(selectedLevel);
+      sceneManager.showQuestionCountView();
+    });
 
-  /**
-   * 设置级别按钮的点击事件.
-   *
-   * @param button 级别按钮.
-   * @param level 对应的难度级别.
-   */
-  private void setupLevelButtonAction(Button button, String level) {
-    button.setOnAction(e -> {
-      sceneManager.getQuestionCountView().setLevel(level);
+    juniorButton.setOnAction(e -> {
+      String selectedLevel = "初中";
+      sceneManager.getQuestionCountView().setLevel(selectedLevel);
       sceneManager.showQuestionCountView();
     });
-  }
 
-  /**
-   * 创建返回按钮.
-   *
-   * @return Button 返回主菜单按钮.
-   */
-  private Button createBackButton() {
-    Button backButton = new Button("返回主菜单");
-    backButton.setStyle("-fx-background-color: #95a5a6; -fx-text-fill: "
-        + "white; -fx-font-size: 14px; -fx-background-radius: 8; -fx-padding: 8 20;");
-    backButton.setPrefSize(180, 45);
-    setupButtonHoverEffect(backButton, "#95a5a6", "#7f8c8d");
-    backButton.setOnAction(e -> sceneManager.showMainMenuView());
+    seniorButton.setOnAction(e -> {
+      String selectedLevel = "高中";
+      sceneManager.getQuestionCountView().setLevel(selectedLevel);
+      sceneManager.showQuestionCountView();
+    });
 
-    return backButton;
+    backButton.setOnAction(e -> {
+      sceneManager.showMainMenuView();
+    });
+
+    selectionContent.getChildren().addAll(
+        titleLabel, subtitleLabel, primaryButton, juniorButton, seniorButton, backButton
+    );
+
+    return selectionContent;
   }
 
-  /**
-   * 创建级别选择按钮.
-   *
-   * @param text 按钮显示文本.
-   * @param color 按钮正常状态颜色.
-   * @param hoverColor 按钮悬停状态颜色.
-   * @return Button 配置好的级别选择按钮.
-   */
   private Button createLevelButton(String text, String color, String hoverColor) {
     Button button = new Button(text);
     button.setStyle(String.format(
-        "-fx-background-color: %s; -fx-text-fill: "
-            + "white; -fx-font-size: 16px; -fx-font-weight: bold;-fx-background-radius: 12;"
-            + "-fx-padding: 12 30;-fx-effect: dropshadow(gaussian, rgba(0,0,0,0.2), 8, 0.3, 2, 2);",
+        "-fx-background-color: %s; -fx-text-fill: white; -fx-font-size: 16px; -fx-font-weight: bold; " +
+            "-fx-background-radius: 12; -fx-padding: 12 30; -fx-effect: dropshadow(gaussian, rgba(0,0,0,0.2), 8, 0.3, 2, 2);",
         color
     ));
     button.setPrefSize(220, 60);
-
-    setupButtonHoverEffect(button, color, hoverColor);
-
+    button.setOnMouseEntered(e -> button.setStyle(String.format(
+        "-fx-background-color: %s; -fx-text-fill: white; -fx-font-size: 16px; -fx-font-weight: bold; " +
+            "-fx-background-radius: 12; -fx-padding: 12 30; -fx-effect: dropshadow(gaussian, rgba(0,0,0,0.3), 10, 0.4, 3, 3);",
+        hoverColor
+    )));
+    button.setOnMouseExited(e -> button.setStyle(String.format(
+        "-fx-background-color: %s; -fx-text-fill: white; -fx-font-size: 16px; -fx-font-weight: bold; " +
+            "-fx-background-radius: 12; -fx-padding: 12 30; -fx-effect: dropshadow(gaussian, rgba(0,0,0,0.2), 8, 0.3, 2, 2);",
+        color
+    )));
     return button;
   }
 
-  /**
-   * 设置按钮的悬停效果.
-   *
-   * @param button 需要设置悬停效果的按钮.
-   * @param normalColor 正常状态颜色.
-   * @param hoverColor 悬停状态颜色.
-   */
-  private void setupButtonHoverEffect(Button button, String normalColor, String hoverColor) {
-    String normalStyle = String.format(
-        "-fx-background-color: %s; -fx-text-fill: white; -fx-font-size: %s;"
-            + " -fx-background-radius: %s; -fx-padding: %s; -fx-effect: "
-            + "dropshadow(gaussian, rgba(0,0,0,0.2), 8, 0.3, 2, 2);",
-        normalColor,
-        button.getStyle().contains("16px") ? "16px" : "14px",
-        button.getStyle().contains("12") ? "12" : "8",
-        button.getStyle().contains("12 30") ? "12 30" : "8 20"
-    );
-
-    String hoverStyle = String.format(
-        "-fx-background-color: %s; -fx-text-fill: white; -fx-font-size: %s;"
-            + " -fx-background-radius: %s; -fx-padding: %s; -fx-effect:"
-            + " dropshadow(gaussian, rgba(0,0,0,0.3), 10, 0.4, 3, 3);",
-        hoverColor,
-        button.getStyle().contains("16px") ? "16px" : "14px",
-        button.getStyle().contains("12") ? "12" : "8",
-        button.getStyle().contains("12 30") ? "12 30" : "8 20"
-    );
-
-    button.setOnMouseEntered(e -> button.setStyle(hoverStyle));
-    button.setOnMouseExited(e -> button.setStyle(normalStyle));
-  }
-
-  /**
-   * 获取用户名的首字母，用于头像显示.
-   *
-   * @return String 用户名的首字母大写，如果用户名为空则返回"U".
-   */
   private String getFirstLetter() {
-    return currentUsername != null && !currentUsername.isEmpty()
-        ? currentUsername.substring(0, 1).toUpperCase() : "U";
+    return currentUsername != null && !currentUsername.isEmpty() ?
+        currentUsername.substring(0, 1).toUpperCase() : "U";
   }
 
-  /**
-   * 更新用户名显示.
-   *
-   * @param username 新的用户名.
-   */
+  // 添加更新用户名的方法
   public void updateUsername(String username) {
     this.currentUsername = username;
     if (usernameLabel != null) {
@@ -299,11 +184,6 @@ public class LevelSelectionView {
     }
   }
 
-  /**
-   * 获取当前场景.
-   *
-   * @return Scene 级别选择界面的场景对象.
-   */
   public Scene getScene() {
     return scene;
   }
diff --git a/src/main/java/com/ybw/mathapp/service/AdvancedCaculate.java b/src/main/java/com/ybw/mathapp/service/AdvancedCaculate.java
index 74240b9..2f41901 100644
--- a/src/main/java/com/ybw/mathapp/service/AdvancedCaculate.java
+++ b/src/main/java/com/ybw/mathapp/service/AdvancedCaculate.java
@@ -20,8 +20,8 @@ import java.util.Stack;
  *
  * <p>例如:
  * <ul>
- *   <li>{@code "3 + 开根号 16 平方"} 解释为 {@code "3 + (sqrt(16))^2"} = {@code "3 + 4^2"} = {@code "3 + 16"} = 19</li>
- *   <li>{@code "开根号 ( 4 + 5 ) 平方"} 解释为 {@code "(sqrt(4+5))^2"} = {@code "sqrt(9)^2"} = {@code "3^2"} = 9</li>
+ *   <li>{@code "3 + 开根号 16 平方"} 解释为 {@code "3 + (sqrt(16))^2"} = 19</li>
+ *   <li>{@code "开根号 ( 4 + 5 ) 平方"} 解释为 {@code "(sqrt(4+5))^2"} = 9</li>
  *   <li>{@code "sin 30 + 5"} 解释为 {@code "sin(30) + 5"} (假设30是度数)</li>
  * </ul>
  *
@@ -134,9 +134,9 @@ public class AdvancedCaculate {
   private static void handleBasicOperator(String token, Stack<Double> numberStack,
       Stack<String> operatorStack) {
     // 处理四则运算符，遵循优先级
-    while (!operatorStack.isEmpty() &&
-        !operatorStack.peek().equals("(") &&
-        PRECEDENCE.get(token) <= PRECEDENCE.getOrDefault(operatorStack.peek(), 0)) {
+    while (!operatorStack.isEmpty()
+        && !operatorStack.peek().equals("(")
+        && PRECEDENCE.get(token) <= PRECEDENCE.getOrDefault(operatorStack.peek(), 0)) {
       processOperator(numberStack, operatorStack.pop());
     }
     operatorStack.push(token);
diff --git a/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java b/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java
index ab31c1a..d84b603 100644
--- a/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java
+++ b/src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java
@@ -69,7 +69,7 @@ public class MultipleChoiceGenerator {
         // 如果无法生成不重复的基础题目，可能基础生成器的可能组合已用尽
         break; // 退出循环
       }
-      QuestionWithOptions mcq = generateSingleMCQ(baseQuestion);
+      QuestionWithOptions mcq = generateSingleMcq(baseQuestion);
       if (mcq != null) {
         mcQuestions.add(mcq);
         seenQuestionTexts.add(baseQuestion); // 添加成功生成的题干
@@ -105,7 +105,7 @@ public class MultipleChoiceGenerator {
    * @param baseQuestion 基础题干字符串，例如 "3 + 5 = ?"
    * @return 生成的选择题对象，如果计算或生成选项失败则返回 null
    */
-  private QuestionWithOptions generateSingleMCQ(String baseQuestion) {
+  private QuestionWithOptions generateSingleMcq(String baseQuestion) {
     try {
       // 从基础题干中提取表达式部分，例如 "3 + 5 = ?" -> "3 + 5"
       String expression = baseQuestion.substring(0, baseQuestion.lastIndexOf(" =")).trim();
@@ -165,7 +165,6 @@ public class MultipleChoiceGenerator {
     }
 
     if (wrongAnswers.size() < numWrongOptions) {
-      // System.out.println("Warning: Could not generate enough distinct wrong answers for: " + correctAnswer);
       return null; // 无法生成足够选项
     }
 
@@ -197,7 +196,7 @@ public class MultipleChoiceGenerator {
     List<String> tokens = new ArrayList<>();
     int i = 0;
     while (i < expression.length()) {
-      String token = _findNextToken(expression, i);
+      String token = findNextToken(expression, i);
       if (token != null) {
         tokens.add(token);
         i += token.length();
@@ -220,8 +219,7 @@ public class MultipleChoiceGenerator {
    * @param startPos   起始查找位置
    * @return 找到的 token，如果未找到则返回 null
    */
-  private String _findNextToken(String expression, int startPos) {
-    String[] advancedOps = {"平方", "开根号", "sin", "cos", "tan"};
+  private String findNextToken(String expression, int startPos) {
     char c = expression.charAt(startPos);
 
     if (Character.isWhitespace(c)) {
@@ -240,6 +238,7 @@ public class MultipleChoiceGenerator {
       return expression.substring(startPos, j);
     }
 
+    String[] advancedOps = {"平方", "开根号", "sin", "cos", "tan"};
     // 检查多字符运算符
     for (String op : advancedOps) {
       if (expression.startsWith(op, startPos)) {
diff --git a/src/main/java/com/ybw/mathapp/util/EmailService.java b/src/main/java/com/ybw/mathapp/util/EmailService.java
index 5a3451d..956d5de 100644
--- a/src/main/java/com/ybw/mathapp/util/EmailService.java
+++ b/src/main/java/com/ybw/mathapp/util/EmailService.java
@@ -111,38 +111,38 @@ public class EmailService {
    * @return HTML格式的邮件正文字符串
    */
   private static String createEmailContent(String code) {
-    return "<!DOCTYPE html>" +
-        "<html>" +
-        "<head>" +
-        "<meta charset='UTF-8'>" +
-        "<style>" +
-        "body { font-family: Arial, sans-serif; line-height: 1.6; color: #333; }" +
-        ".container { max-width: 600px; margin: 0 auto; padding: 20px; }" +
-        ".header { background-color: #4CAF50; color: white; padding: 20px; text-align: center; }" +
-        ".content { padding: 20px; background-color: #f9f9f9; margin: 20px 0; }" +
-        ".code { font-size: 24px; font-weight: bold; color: #4CAF50; text-align: center; padding: 15px; background-color: white; border: 2px dashed #4CAF50; margin: 20px 0; }"
-        +
-        ".footer { text-align: center; color: #666; font-size: 12px; }" +
-        "</style>" +
-        "</head>" +
-        "<body>" +
-        "<div class='container'>" +
-        "<div class='header'>" +
-        "<h2>用户注册验证码</h2>" +
-        "</div>" +
-        "<div class='content'>" +
-        "<p>您好！</p>" +
-        "<p>您正在注册账户，验证码如下：</p>" +
-        "<div class='code'>" + code + "</div>" +
-        "<p>验证码有效期为 " + EmailConfig.CODE_EXPIRY_MINUTES + " 分钟，请勿泄露给他人。</p>" +
-        "<p>如果这不是您本人的操作，请忽略此邮件。</p>" +
-        "</div>" +
-        "<div class='footer'>" +
-        "<p>此邮件为系统自动发送，请勿回复。</p>" +
-        "</div>" +
-        "</div>" +
-        "</body>" +
-        "</html>";
+    return "<!DOCTYPE html>"
+        + "<html>"
+        + "<head>"
+        + "<meta charset='UTF-8'>"
+        + "<style>"
+        + "body { font-family: Arial, sans-serif; line-height: 1.6; color: #333; }"
+        + ".container { max-width: 600px; margin: 0 auto; padding: 20px; }"
+        + ".header { background-color: #4CAF50; color: white; padding: 20px; text-align: center; }"
+        + ".content { padding: 20px; background-color: #f9f9f9; margin: 20px 0; }"
+        + ".code { font-size: 24px; font-weight: bold; color: #4CAF50; text-align: center; "
+        + "padding: 15px; background-color: white; border: 2px dashed #4CAF50; margin: 20px 0; }"
+        + ".footer { text-align: center; color: #666; font-size: 12px; }"
+        + "</style>"
+        + "</head>"
+        + "<body>"
+        + "<div class='container'>"
+        + "<div class='header'>"
+        + "<h2>用户注册验证码</h2>"
+        + "</div>"
+        + "<div class='content'>"
+        + "<p>您好！</p>"
+        + "<p>您正在注册账户，验证码如下：</p>"
+        + "<div class='code'>" + code + "</div>"
+        + "<p>验证码有效期为 " + EmailConfig.CODE_EXPIRY_MINUTES + " 分钟，请勿泄露给他人。</p>"
+        + "<p>如果这不是您本人的操作，请忽略此邮件。</p>"
+        + "</div>"
+        + "<div class='footer'>"
+        + "<p>此邮件为系统自动发送，请勿回复。</p>"
+        + "</div>"
+        + "</div>"
+        + "</body>"
+        + "</html>";
   }
 
   /**
@@ -178,8 +178,8 @@ public class EmailService {
 
     while (iterator.hasNext()) {
       Map.Entry<String, VerificationCodeInfo> entry = iterator.next();
-      if (currentTime - entry.getValue().timestamp >
-          EmailConfig.CODE_EXPIRY_MINUTES * 60 * 1000) {
+      if (currentTime - entry.getValue().timestamp
+          > EmailConfig.CODE_EXPIRY_MINUTES * 60 * 1000) {
         iterator.remove();
       }
     }