스프링 데이터 JPA 리포지토리로 변경 public interface MemberRepository extends JpaRepository { List findByUsername(String username); // select m from Member m where m.username=? } @SpringBootTest @Transactional class MemberRepositoryTest { @Autowired EntityManager em; @Autowired MemberRepository memberRepository; @Test public void basicTest(){ Member member = new Member("member1", 10); memberRepository.save(me..