package com.example.board.repository;import com.example.board.entity.Member;import org.springframework.data.jpa.repository.JpaRepository;import java.util.Optional;// repository layer의 인터페이스(interface)public interface MemberRepository extends JpaRepository { Optional findById(Long id); /* [수정 전] findByIdInRepository(Long id) [수정 후] findById(Long id) */}어제 본 Error creating bean wit..