TIL)2022-12-01(spring,test)

 

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Spring

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Spring 1주차 Test

1. MemberRepository

package com.example.springtest1.repository;

import com.example.springtest1.dto.MemberResponseDto;
import com.example.springtest1.entitiy.Member;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface MemberRepository extends JpaRepository<Member, Long> {
    List<Member> findAllByOrderByModifiedAtDesc();
}

@Repository

JpaRepository를 extends 하여 Member (Entity)에서 데이터 받아오기

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2.Member

package com.example.springtest1.entitiy;

import com.example.springtest1.dto.MemberResponseDto;
import lombok.Getter;
import lombok.NoArgsConstructor;

import javax.persistence.*;

@Getter
@Entity
@NoArgsConstructor
public class Member {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = false)
    private String name;

    @Column(nullable = false)
    private String email;

    @Column(nullable = false)
    private Long pw;



    public Member(MemberResponseDto memberResponseDto){
        this.name = memberResponseDto.getName();
        this.id = memberResponseDto.getId();
        this.pw = memberResponseDto.getPw();
        this.email = memberResponseDto.getEmail();
    }
    

}

@Entity >  데이터베이스 테이블과 1대1매칭

@noArgsConstructor > 파라미터가 없는 기본 생성자 생성

@Getter > 모든 필드에 Getter메소드 생성

@GeneratedValue > 기본키에 저장된 속성 지정

entity에 생성자 생성

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3. MemberResponseDto

package com.example.springtest1.dto;

import com.example.springtest1.entitiy.Member;
import lombok.Getter;

@Getter
public class MemberResponseDto {
    private Long id;

    private String name;


    private String email;


    private Long pw;

    public MemberResponseDto(Member member){
        this.id =member.getId();
        this.pw = member.getPw();
        this.email = member.getEmail();
        this.name = member.getName();

    }
}

@Getter > 모든 필드에 Getter메소드 생성

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4. MemberController

package com.example.springtest1.controller;
import com.example.springtest1.dto.MemberResponseDto;
import lombok.RequiredArgsConstructor;

import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequiredArgsConstructor
public class MemberController {



    private final com.example.springtest1.service.MemberService memberService;


    /**
     * 한 회원의 userId가 주었을때 회원 정보를 조회하는 API
     * @param id
     */
    @GetMapping("/member/{id}")
    public MemberResponseDto getMemberInfo(@RequestParam Long id) {
        return memberService.findMember(id);
    }

    /**
     * 회원의 전체 목록을 조회하는 API
     */
    @GetMapping("/member")
    public List<MemberResponseDto> getMemberList() {
        return memberService.findAllMember();

    }

}

 

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5.MemberService

package com.example.springtest1.service;

import com.example.springtest1.dto.MemberResponseDto;
import com.example.springtest1.entitiy.Member;
import com.example.springtest1.repository.MemberRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
@RequiredArgsConstructor
public class MemberService {

    private final MemberRepository memberRepository;


    public MemberResponseDto findMember(Long id){
        Member member = getMember(id,"존재하지 않습니다");
        MemberResponseDto memberResponseDto = new MemberResponseDto(member);
        return memberResponseDto;
    }

    public List<MemberResponseDto> findAllMember() {
        List<Member> memo = memberRepository.findAllByOrderByModifiedAtDesc();
        return memo.stream().map(memo1 ->new MemberResponseDto(memo1)).collect(Collectors.toList());
    }

    private Member getMember(Long id, String 존재하지_않습니다) {
        Member member=memberRepository.findById(id).orElseThrow(
                () -> new NullPointerException()
        );
        return member;
    }
}

 

데이터 값을 DTO로 감싸서 리턴

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Spring 이론

Entity 와 DTO

https://ik0501.tistory.com/entry/Spring-Entity%EC%99%80-DTO-VO

Spring) Entity와 DTO ,VO

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새로 알게된 내용

DTO와 Entity의 차이

DTO - Entity 변환