Everyday Dev System

1. 아래 코드를 간략화 할 수 있는가? List postList = postRepository.findAll(); List postResponseDtoList; postResponseDtoList = postList.stream() .map(post -> { PostResponseDto responseDto = new PostResponseDto(post); return responseDto; }) .collect(Collectors.toList()); 간략화한 결과 : List postList = postRepository.findAll(); List postResponseDtoList = postList.stream() .map(PostResponseDto::new) .toList()); 위 코드에..

All persistent classes must have a default constructor (which can be non-public) so that Hibernate can instantiate them using Constructor.newInstance(). It is recommended that you have a default constructor with at least package visibility for runtime proxy generation in Hibernate. 한번 빈 생성자를 없애고 실행해봤다. 역시나 안됐다! JPA(Java Persistence API)에서 @Entity 어노테이션을 사용하여 엔티티 클래스를 정의할 때, 기본 생성자(빈 생성자)가 꼭 필요한 ..