[스프링 - 스프링 입문] 회원 도메인과 리포지토리 만들기

interface로 멤버 레파지토리 생성

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();

    void clearStore();
}

 

생성할때 option 눌러서 한번에 메서드 생성

package hello.hellospring.repository;
import hello.hellospring.domain.Member;
import java.util.*;

public class MemoryMemberRepository implements MemberRepository{
    private static Map<Long, Member> store = new HashMap<>();
    private static long sequence = 0L;


    public Member save(Member member) {
        member.setId(++sequence);
        store.put(member.getId(),member);
        return member;
    }

    @Override
    public Optional<Member> findById(Long id) {
        return Optional.ofNullable(store.get(id));
    }

    @Override
    public Optional<Member> findByName(String name) {
        return  store.values().stream().filter(member -> member.getName().equals(name)).findAny();
    }

    @Override
    public List<Member> findAll() {
        return  new ArrayList<>(store.values());
    }

    public void clearStore() {
        store.clear();
    }
}

 

멤버 서비스

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemberRepository;
import hello.hellospring.repository.MemoryMemberRepository;
import org.springframework.beans.factory.annotation.Autowired;

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

public class MemberService {

    private final MemberRepository memberRepository ;//= new MemoryMemberRepository();

    public MemberService(MemberRepository memberRepository){
        this.memberRepository = memberRepository;
    }

    public Long join(Member member) {
        //중복이름 안됨
        volidataDuplicateMember(member);
        memberRepository.save(member);
        return member.getId();

    }

    private void volidataDuplicateMember(Member member) {
        memberRepository.findByName(member.getName())
              .ifPresent(m -> {
                      throw new IllegalStateException("이미 존재하는 회원");

              });
    }

    public List<Member> findMembers(){
        return memberRepository.findAll();
    }
     public  Optional<Member> findOne(Long memberId){
        return memberRepository.findById(memberId);
     }
}

 

컨트롤러

package hello.hellospring.controller;

import hello.hellospring.domain.Member;
import hello.hellospring.service.MemberService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

import java.util.List;

@Controller
public class MemberController {
    private final MemberService memberService;

    @Autowired  //빈 컨트롤에 있는걸 넣어준다
    public MemberController(MemberService memberService) {
        this.memberService = memberService;
    }
   //url mapping
    @GetMapping("/members/new")
    public String createFrom(){
        //템플릿에서 찾아본다.
        return "members/createMemberFrom";
    }


    @PostMapping("/members/new")
    public String create(MemberForm form){
        Member member = new Member();
        member.setName(form.getName());

        memberService.join(member);
        //처음 화면으로 돌아가기
        return "redirect:/";
    }
    @GetMapping("/members")
    public String list(Model model){
        List<Member> members = memberService.findMembers();
        model.addAttribute("members",members);
        return "members/memberList";
    }
}