增加邮箱验证

src/Main.java

@@ -142,10 +142,12 @@ public class Main extends Application {
                 return;
             }
 
-            if (!email.contains("@")) {
-                infoLabel.setText("邮箱格式不正确");
+            // 使用新的邮箱验证方法
+            if (!isValidEmail(email)) {
+                infoLabel.setText("邮箱格式不正确，请使用有效的邮箱地址");
                 return;
             }
+
             if (userDatabase.containsKey(email)) {
                 infoLabel.setText("该邮箱已注册");
                 return;
@@ -160,7 +162,7 @@ public class Main extends Application {
                     if (success) {
                         infoLabel.setText("验证码已发送，请查看邮箱");
                     } else {
-                        infoLabel.setText("发送失败，请检查邮箱");
+                        infoLabel.setText("发送失败，请检查邮箱是否正确");
                     }
                 });
             }).start();
@@ -222,6 +224,47 @@ public class Main extends Application {
         return username.matches("^[a-zA-Z0-9_]+$");
     }
 
+    // 邮箱完整验证方法
+    private boolean isValidEmail(String email) {
+        if (email == null || email.trim().isEmpty()) {
+            return false;
+        }
+
+        String regex = "^[A-Za-z0-9+_.-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}$";
+
+        // 基本格式检查
+        if (!email.matches(regex)) {
+            return false;
+        }
+
+        // 检查@符号位置
+        int atIndex = email.indexOf('@');
+        if (atIndex <= 0 || atIndex == email.length() - 1) {
+            return false;
+        }
+
+        // 检查域名部分
+        String domain = email.substring(atIndex + 1);
+        if (domain.indexOf('.') <= 0 || domain.endsWith(".")) {
+            return false;
+        }
+
+        // 检查常见邮箱服务商
+        String[] commonDomains = {"qq.com", "gmail.com", "163.com", "126.com", "sina.com",
+                "hotmail.com", "outlook.com", "yahoo.com", "foxmail.com"};
+        boolean hasCommonDomain = false;
+        for (String commonDomain : commonDomains) {
+            if (domain.equalsIgnoreCase(commonDomain)) {
+                hasCommonDomain = true;
+                break;
+            }
+        }
+
+
+
+        return true;
+    }
+
     // 密码验证方法
     private boolean isValidPassword(String password) {
         if (password.length() < 6 || password.length() > 10) {
@@ -240,6 +283,8 @@ public class Main extends Application {
         return hasUpper && hasLower && hasDigit;
     }
 
+
+
     // 难度选择界面
     private Scene buildLevelSelectionScene() {
         VBox root = new VBox(15);