小编ehs*_*ini的帖子

如果电子邮件地址已存在，则抛出一条异常消息（“消息：”具有“+tempEmailId+”的用户已存在”）。当我在邮递员中测试时，我没有收到异常消息。你能帮我吗？在哪里问题？

控制器类：

@RestController
public class RegistrationController {

    @Autowired
    private RegistrationService service;
    
    @PostMapping("/registeruser")
    public  User registerUser(@RequestBody User user) throws Exception {
        
        String tempEmailId = user.getEmailId();
        if(tempEmailId !=null && !"".equals(tempEmailId)) {
            User userObject = service.fetchUserByEmailId(tempEmailId);
            if(userObject!=null) {
                throw new Exception("User with "+tempEmailId+" is already exist");
            }
        }
        User userObject = null;
        userObject = service.saveUser(user);
        return userObject;

    }
}

存储库：

public interface RegistrationRepository extends JpaRepository<User, Integer> {

    public User findByEmailId(String emailId);  // Here we declare 
}  

服务：

@Service

public class RegistrationService {

    @Autowired …