[Feat] Week 2 실습 및 TIL 작성/ 이전 세션 실습 완성

week1/seungbeom/src/main/java/hello/hello_spring/controller/MemberController.java

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+package hello.hello_spring.controller;
+
+public class MemberController {
+}

week1/seungbeom/src/main/java/hello/hello_spring/domain/Member.java

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+package hello.hello_spring.domain;
+
+public class Member {
+}

week1/seungbeom/src/main/java/hello/hello_spring/repository/MemberRepository.java

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+package hello.hello_spring.repository;
+
+public interface MemberRepository {
+}

week1/seungbeom/src/main/java/hello/hello_spring/repository/MemoryMemberRepository.java

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+package hello.hello_spring.repository;
+
+public class MemoryMemberRepository {
+}

week1/seungbeom/src/main/java/hello/hello_spring/service/MemberService.java

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+package hello.hello_spring.service;
+
+import hello.hello_spring.domain.Member;
+import hello.hello_spring.repository.MemberRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class MemberService {
+
+    private final MemberRepository memberRepository;
+
+    @Autowired //의존성 주입
+    public MemberService(MemberRepository memberRepository) {
+        this.memberRepository = memberRepository;
+    }
+
+    public Long join(Member member) {
+        validateMember(member);
+        return memberRepository.save(member).getId();
+    }
+
+    private void validateMember(Member member) {
+        memberRepository.findByName(member.getName())
+                .ifPresent(m ->{
+                    throw new IllegalStateException("이미 존재하는 회원입니다.");
+                });
+    }
+
+    public List<Member> findAll() {
+        return memberRepository.findAll();
+    }
+
+    public Optional<Member> findById(Long id) {
+        return memberRepository.findById(id);
+    }
+}

week1/seungbeom/src/test/java/hello/hello_spring/repository/MemoryMemberRepositoryTest.java

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+import static org.junit.jupiter.api.Assertions.*;
+class MemoryMemberRepositoryTest {
+
+}

week1/seungbeom/src/test/java/hello/hello_spring/service/MemberSeriviceTest.java

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+import static org.junit.jupiter.api.Assertions.*;
+class MemberSeriviceTest {
+
+}

week2/seungbeom/.gitignore

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+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/