springBoot / mapstruct

🍟 dto <> entity 변환 시, mapstruct 라이브러리를 사용하는 방법이 있다.

 

 

 

세팅 : 

 

build.gradle 

dependencies {

   //MapStruct
    annotationProcessor 'org.mapstruct:mapstruct-processor:1.4.2.Final'
    implementation 'org.mapstruct:mapstruct:1.4.2.Final'
    
}

 

mapper

 

* UserMapper로 구현함. 

 

package com.org.walk.user;

import com.org.walk.util.EntityMapper;
import org.mapstruct.Mapper;
import org.mapstruct.factory.Mappers;

@Mapper
public interface UserMapper extends EntityMapper<UserDto, UserEntity> {

    UserMapper mapper = Mappers.getMapper(UserMapper.class);

}

 

 

 

 

EntityMapper 

 

package com.org.walk.util;

public interface EntityMapper<D, E> {

    E toEntity(final D dto);

    D toDto(final E entity);

}

 

 

 

 

 

 

service 단에서 사용 시, 다음과 같음

 

package com.org.walk.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Optional;

@Service
public class UserServiceImpl implements UserService {

    @Override
    public void postUser(UserDto userDto) throws Exception {

        UserEntity userEntity = UserMapper.mapper.toEntity(userDto);
        userRepository.save(userEntity);

    }
    
}