Refactor MemberService to return DTO in getMemberBy.

Updated `MemberService` to return `MemberResponse` DTO instead of the `Member` entity, encapsulating domain data. Introduced the `MemberResponse` class to map entity fields, and adjusted the controller to reflect the DTO usage. This improves separation of concerns and avoids exposing domain entities directly.

Author: Ahn-JoonHun

spring-boot/src/main/java/com/mpc/springboot/member/application/dto/MemberResponse.java

@@ -0,0 +1,18 @@
+package com.mpc.springboot.member.application.dto;
+
+import com.mpc.springboot.member.domain.entity.Member;
+import com.mpc.springboot.member.domain.vo.MemberCode;
+import com.mpc.springboot.member.domain.vo.MemberName;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public class MemberResponse {
+    private final MemberCode code;
+    private final MemberName name;
+
+    public static MemberResponse of(Member member) {
+        return new MemberResponse(member.getCode(), member.getName());
+    }
+}

spring-boot/src/main/java/com/mpc/springboot/member/application/service/MemberService.java

@@ -3,6 +3,7 @@
 import jakarta.transaction.Transactional;
 
 import org.springframework.stereotype.Service;
+import com.mpc.springboot.member.application.dto.MemberResponse;
 import com.mpc.springboot.member.domain.entity.Member;
 import com.mpc.springboot.member.domain.exception.MemberNotFoundException;
 import com.mpc.springboot.member.domain.repository.MemberRepository;
@@ -15,9 +16,10 @@ public class MemberService {
 
     private final MemberRepository memberRepository;
 
-    public Member getMemberBy(MemberCode code) {
-        return memberRepository.findMemberBy(code)
-                .orElseThrow(MemberNotFoundException::new);
+    public MemberResponse getMemberBy(MemberCode code) {
+        Member member = memberRepository.findMemberBy(code)
+            .orElseThrow(MemberNotFoundException::new);
+        return MemberResponse.of(member);
     }
 
     @Transactional

spring-boot/src/main/java/com/mpc/springboot/member/presentation/controller/MemberRestController.java

@@ -2,6 +2,7 @@
 
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
+import com.mpc.springboot.member.application.dto.MemberResponse;
 import com.mpc.springboot.member.application.service.MemberService;
 import com.mpc.springboot.member.domain.entity.Member;
 import com.mpc.springboot.member.domain.vo.MemberCode;
@@ -15,7 +16,7 @@ public class MemberRestController {
     private final MemberService memberService;
 
     @GetMapping("/{code}")
-    public ResponseEntity<Member> getMemberBy(@PathVariable MemberCode code) {
+    public ResponseEntity<MemberResponse> getMemberBy(@PathVariable MemberCode code) {
         return ResponseEntity.ok(memberService.getMemberBy(code));
     }