feat : Spring Bean - Scan components and set automatic dependencies

src/main/java/hello/hellospring/controller/MemberController.java

@@ -0,0 +1,17 @@
+package hello.hellospring.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+
+import hello.hellospring.service.MemberService;
+
+@Controller
+public class MemberController {
+
+	private final MemberService memberService;
+
+	@Autowired
+	public MemberController(MemberService memberService) {
+		this.memberService = memberService;
+	}
+}

src/main/java/hello/hellospring/repository/MemoryMemberRepository.java

@@ -6,9 +6,12 @@
 import java.util.Map;
 import java.util.Optional;
 
+import org.springframework.stereotype.Repository;
+
 import hello.hellospring.domain.Member;
 
 /*동시성 문제가 고려되어 있지 않음, 실무에서는 ConcurrentHashMap, AtomicLong 사용 고려*/
+@Repository
 public class MemoryMemberRepository implements MemberReository {
 	private static Map<Long, Member> store = new HashMap<>();
 	private static long sequense = 0L;

src/main/java/hello/hellospring/service/MemberService.java

@@ -3,15 +3,20 @@
 import java.util.List;
 import java.util.Optional;
 
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
 import hello.hellospring.domain.Member;
 import hello.hellospring.repository.MemberReository;
 
+@Service
 public class MemberService {
 
-
 	// private final MemberReository memberReository = new MemoryMemberRepository();
 	// 같은 리포지토리로 테스트 해야하기 때문에 아래와 같이 변경
 	private final MemberReository memberReository;
+
+	@Autowired
 	public MemberService(MemberReository memberReository) {
 		this.memberReository = memberReository;
 	}