🔨RequestVo 생성

@Data
public class RequestUser {
    @NotNull(message = "Email cannot be null")
    @Size(min = 2, message = "Email not be less than two characters")
    @Email
    private String email;
    @NotNull(message = "Name cannot be null")
    @Size(min = 2, message = "Name not be less than two characters")
    private String name;
    @NotNull(message =  "Pwd cannot be null")
    @Size(min = 8, message = "Pwd not be less than two characters")
    private String pwd;
}

🔨UserDto 생성

@Data
public class UserDto {
    private String email;
    private String name;
    private String pwd;
    private String userId;
    private LocalDateTime createAt;
    private String encryptedPwd;
}

🔨UserService 생성

public interface UserService {
    UserDto createUser(UserDto userDto);
}

@Service
@RequiredArgsConstructor
public class UserServiceImpl implements UserService{
    private final UserRepository userRepository;

    @Override
    public UserDto createUser(UserDto userDto) {
        userDto.setUserId(UUID.randomUUID().toString());

        ModelMapper mapper = new ModelMapper();
        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
        UserEntity userEntity = mapper.map(userDto, UserEntity.class);
        userEntity.setEncryptedPwd("encryptedPwd");

        UserEntity save = userRepository.save(userEntity);
        return null;
    }
}

🔨UserEntity 생성

@Data
@Entity
@Table(name = "users")
public class UserEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false, length = 50, unique = true)
    private String email;
    @Column(nullable = false, length = 50)
    private String name;
    @Column(nullable = false, unique = true)
    private String userId;
    @Column(nullable = false, length = 50)
    private String encryptedPwd;
}

public interface UserRepository extends CrudRepository<UserEntity, Long> {
}

ModelMapper 추가

<dependency>
    <groupId>org.modelmapper</groupId>
    <artifactId>modelmapper</artifactId>
    <version>2.3.8</version>
</dependency>

Dto > Entity로 혹은 Dto > Vo로 변환할 때 set이나 생성자를 통해서 해도 되지만 좀 더 간편하게 변경하기 위한 라이브러리

🔨Controller 수정

@RestController
@RequestMapping("/")
@RequiredArgsConstructor
public class UserController {

    private final Environment env;
    private final Greeting greeting;
    private final UserService userService;

    ...

    @PostMapping("/users")
    public String createUser(@RequestBody RequestUser user){
        ModelMapper mapper = new ModelMapper();
        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
        UserDto userDto = mapper.map(user, UserDto.class);
        userService.createUser(userDto);
        return "Create User!";
    }
}

🔨yml 수정

...
spring:
  application:
    name: user-service  #Eureka에 등록되는 서비스 이름
  h2:
    console:
      enabled: true
      settings:
        web-allow-others: true
      path: /h2-console
  datasource:
    driver-class-name: org.h2.Driver
    url: jdbc:h2:mem:testdb
    username: sa
    password:
...

테스트

실제로 데이터를 전송하면 Create User!를 반환받으며

db에도 정상적으로 데이터가 들어갔다.

하지만! api 반환은 ResponseEntity로!

@RestController
@RequestMapping("/")
@RequiredArgsConstructor
public class UserController {
    ...

    @PostMapping("/users")
    public ResponseEntity createUser(@RequestBody RequestUser user){
        ModelMapper mapper = new ModelMapper();
        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
        UserDto userDto = mapper.map(user, UserDto.class);
        userService.createUser(userDto);
        return ResponseEntity.status(HttpStatus.CREATED).body(null);
    }
}

String으로 Create User!와 무조건 200 Ok를 보내는 것 보다 생성되었을 때는 201코드를 보내주는 것이 더 올바른 방법이다. 그래서 위와 같이 코드를 변경해서 다시 테스트 해보자.

정상적으로 실행됨을 알수 있다.

좀 더 rest api 답게 수정

🔨ResponseUser 생성

@Data
public class ResponseUser {
    private String email;
    private String name;
    private String userId;
}

🔨Service 수정

public interface UserService {
    ResponseUser createUser(UserDto userDto);
}

@Service
@RequiredArgsConstructor
public class UserServiceImpl implements UserService{
    private final UserRepository userRepository;

    @Override
    public ResponseUser createUser(UserDto userDto) {
        userDto.setUserId(UUID.randomUUID().toString());

        ModelMapper mapper = new ModelMapper();
        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
        UserEntity userEntity = mapper.map(userDto, UserEntity.class);
        userEntity.setEncryptedPwd("encryptedPwd");

        UserEntity save = userRepository.save(userEntity);
        ResponseUser responseUser = mapper.map(save, ResponseUser.class);

        return responseUser;
    }
}

🔨Controller 수정

@RestController
@RequestMapping("/")
@RequiredArgsConstructor
public class UserController {

    ...

    @PostMapping("/users")
    public ResponseEntity createUser(@RequestBody RequestUser user){
        ModelMapper mapper = new ModelMapper();
        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
        UserDto userDto = mapper.map(user, UserDto.class);
        ResponseUser responseUser = userService.createUser(userDto);

        return ResponseEntity.status(HttpStatus.CREATED).body(responseUser);
    }
}

다음과 같이 수정하여 회원가입 시 return 하는 데이터를 만들어서 반환해보자.

상태코드값, 반환 데이터를 이제 우리가 반환할 수 있게 만들었다.