feat(auth): 优化注册功能并添加注册异常处理

- 新增 RegistrationException 类用于处理注册相关的异常
- 在全局异常处理器中添加 RegistrationException 的处理逻辑
- 修改用户服务中的注册逻辑，当用户名或邮箱已存在时抛出 RegistrationException
- 更新注册码实体类，将日期时间字段改为字符串类型
- 调整注册码生成和验证逻辑，使用字符串格式的日期时间

biji-houdaun/src/main/java/com/test/bijihoudaun/service/impl/RegistrationCodeServiceImpl.java

@@ -10,6 +10,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.UUID;
 
 @Service
@@ -21,7 +22,8 @@ public class RegistrationCodeServiceImpl extends ServiceImpl<RegistrationCodeMap
         String code = UUID.randomUUID().toString().replaceAll("-", "").substring(0, 16);
         registrationCode.setCode(code);
         registrationCode.setCreatedBy(creator);
-        registrationCode.setExpiryTime(LocalDateTime.now().plusDays(1));
+        registrationCode.setCreatedAt(LocalDateTime.now().toString());
+        registrationCode.setExpiryTime(LocalDateTime.now().plusDays(1).toString());
         save(registrationCode);
         return code;
     }
@@ -37,7 +39,8 @@ public class RegistrationCodeServiceImpl extends ServiceImpl<RegistrationCodeMap
             return false;
         }
 
-        if (registrationCode.getExpiryTime().isBefore(LocalDateTime.now())) {
+        LocalDateTime expiryTime = LocalDateTime.parse(registrationCode.getExpiryTime());
+        if (expiryTime.isBefore(LocalDateTime.now())) {
             remove(queryWrapper); // 注册码过期，删除
             return false;
         }
@@ -50,6 +53,6 @@ public class RegistrationCodeServiceImpl extends ServiceImpl<RegistrationCodeMap
     @Override
     @Scheduled(cron = "0 0 1 * * ?") // 每天凌晨1点执行
     public void deleteExpiredCodes() {
-        remove(new QueryWrapper<RegistrationCode>().lt("expiry_time", LocalDateTime.now()));
+        remove(new QueryWrapper<RegistrationCode>().lt("expiry_time", LocalDateTime.now().toString()));
     }
 }

biji-houdaun/src/main/java/com/test/bijihoudaun/service/impl/UserServiceImpl.java

@@ -3,6 +3,7 @@ package com.test.bijihoudaun.service.impl;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.test.bijihoudaun.common.exception.RegistrationException;
 import com.test.bijihoudaun.entity.User;
 import com.test.bijihoudaun.mapper.UserMapper;
 import com.test.bijihoudaun.service.UserService;
@@ -40,18 +41,18 @@ public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements Us
         LambdaQueryWrapper<User> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(User::getUsername, username);
         if (this.count(queryWrapper) > 0) {
-            return null;
+            throw new RegistrationException("用户名已存在");
         }
         queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(User::getEmail, email);
         if (this.count(queryWrapper) > 0) {
-            return null;
+            throw new RegistrationException("电子邮箱已被注册");
         }
         User user = new User();
         user.setUsername(username);
         user.setPassword(encrypt);
         user.setEmail(email);
-        user.setCreatedAt(new Date());
+        // user.setCreatedAt(new Date()); // Let the database handle the default value
         userMapper.insert(user);
         return user;
     }