스프링 DB 접근 기술 - 스프링 데이터 JPA error

각 파일에 clearStore 부분을 없애준다.

// MemberRepository interface(src - repository폴더)

package hello.hellospring.repository;


import hello.hellospring.domain.Member;

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

public interface MemberRepository {
    Member save(Member member);
    Optional<Member> findById(Long id);
    Optional<Member> findByName(String name);
    List<Member> findAll();
}

// JpaMemberRepository

package hello.hellospring.repository;

import hello.hellospring.domain.Member;

import javax.persistence.EntityManager;
import java.util.List;
import java.util.Optional;

public class JpaMemberRepository implements MemberRepository{

    private final EntityManager em;

    public JpaMemberRepository(EntityManager em) {
        this.em = em;
    }

    @Override
    public Member save(Member member) {
        em.persist(member);
        return null;
    }

    @Override
    public Optional<Member> findById(Long id) {
        Member member = em.find(Member.class, id);
        return Optional.ofNullable(member);
    }

    @Override
    public Optional<Member> findByName(String name) {
        List<Member> result = em.createQuery("select m from Member m where m.name = :name", Member.class)
                .setParameter("name", name)
                .getResultList();

        return result.stream().findAny();
    }

    @Override
    public List<Member> findAll() {
        return em.createQuery("select m from Member m", Member.class)
                .getResultList();
    }
}

// SpringDataJpaMemberRepository

package hello.hellospring.repository;
import hello.hellospring.domain.Member;
import org.springframework.data.jpa.repository.JpaRepository;
import java.util.Optional;


public interface SpringDataJpaMemberRepository extends JpaRepository<Member, Long>, MemberRepository {


    // JPQL select m from Member m where m.name = ?
    @Override
    Optional<Member> findByName(String name);
}

 

 

 

 

 

에러 해결 아래 코드를 참고

https://www.inflearn.com/questions/109011

jpa부분 이후로 계속되는 오류.. - 인프런 | 질문 & 답변

 

 

 

 

 

 

 

 

 

 

<출처 김영한: 스프링 입문 - 코드로 배우는 스프링 부트, 웹 MVC, DB 접근 기술 >

https://www.inflearn.com/course/%EC%8A%A4%ED%94%84%EB%A7%81-%EC%9E%85%EB%AC%B8-%EC%8A%A4%ED%94%84%EB%A7%81%EB%B6%80%ED%8A%B8/dashboard

[무료] 스프링 입문 - 코드로 배우는 스프링 부트, 웹 MVC, DB 접근 기술 - 인프런 | 강의