[API 응답 표준화]

README.md

@@ -32,7 +32,94 @@ src/main/java/com/bio/bio_backend/
 └── BioBackendApplication.java
 ```
 
-### 2. API 문서화 (Swagger)
+### 2. API 응답 표준화 (CustomApiResponse)
+
+#### 응답 구조
+
+모든 API 응답은 `CustomApiResponse<T>` 형태로 표준화되어 있습니다.
+
+```java
+public class CustomApiResponse<T> {
+    private int code;           // HTTP 상태 코드
+    private String message;     // 응답 메시지 (ApiResponseCode enum 값)
+    private String description; // 응답 설명
+    private T data;            // 실제 데이터 (제네릭 타입)
+}
+```
+
+#### 응답 예시
+
+**성공 응답 (201 Created)**
+
+```json
+{
+  "code": 201,
+  "message": "COMMON_SUCCESS_CREATED",
+  "description": "Created successfully",
+  "data": {
+    "seq": 1,
+    "userId": "user123",
+    "name": "홍길동"
+  }
+}
+```
+
+**실패 응답 (409 Conflict)**
+
+```json
+{
+  "code": 409,
+  "message": "USER_ID_DUPLICATE",
+  "description": "User ID already exists",
+  "data": null
+}
+```
+
+#### 사용 방법
+
+**Controller에서 응답 생성**
+
+```java
+@PostMapping("/members")
+public ResponseEntity<CustomApiResponse<CreateMemberResponseDto>> createMember(@RequestBody CreateMemberRequestDto requestDto) {
+    // ... 비즈니스 로직 ...
+
+    // 성공 응답
+    CustomApiResponse<CreateMemberResponseDto> apiResponse =
+        CustomApiResponse.success(ApiResponseCode.COMMON_SUCCESS_CREATED, responseDto);
+
+    return ResponseEntity.status(HttpStatus.CREATED).body(apiResponse);
+}
+```
+
+**공용 응답 코드 사용**
+
+```java
+// ApiResponseCode.java
+public enum ApiResponseCode {
+    // 공용 성공 코드
+    COMMON_SUCCESS_CREATED(HttpStatus.CREATED.value(), "Created successfully"),
+    COMMON_SUCCESS_UPDATED(HttpStatus.OK.value(), "Updated successfully"),
+    COMMON_SUCCESS_DELETED(HttpStatus.OK.value(), "Deleted successfully"),
+    COMMON_SUCCESS_RETRIEVED(HttpStatus.OK.value(), "Retrieved successfully"),
+
+    // 공용 오류 코드
+    COMMON_BAD_REQUEST(HttpStatus.BAD_REQUEST.value(), "Required request body is missing or Error"),
+    COMMON_UNAUTHORIZED(HttpStatus.UNAUTHORIZED.value(), "Unauthorized"),
+    COMMON_FORBIDDEN(HttpStatus.FORBIDDEN.value(), "Access is denied"),
+    COMMON_NOT_FOUND(HttpStatus.NOT_FOUND.value(), "Resource is not found"),
+    COMMON_INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR.value(), "An error occurred on the server")
+}
+```
+
+#### 핵심 규칙
+
+- **모든 API 응답**: `CustomApiResponse<T>`로 감싸서 반환
+- **공용 응답 코드**: `COMMON_` 접두사로 시작하는 범용 코드 사용
+- **일관된 구조**: `code`, `message`, `description`, `data` 필드로 표준화
+- **제네릭 활용**: `<T>`를 통해 다양한 데이터 타입 지원
+
+### 3. API 문서화 (Swagger)
 
 #### Swagger UI 접속
 
@@ -45,8 +132,12 @@ src/main/java/com/bio/bio_backend/
 @Tag(name = "Member", description = "회원 관리 API")
 @Operation(summary = "회원 가입", description = "새로운 회원을 등록합니다.")
 @ApiResponses(value = {
-    @ApiResponse(responseCode = "201", description = "회원 가입 성공"),
+    @ApiResponse(responseCode = "201", description = "회원 가입 성공",
-    @ApiResponse(responseCode = "400", description = "잘못된 요청 데이터")
+                content = @Content(schema = @Schema(implementation = CustomApiResponse.class))),
+    @ApiResponse(responseCode = "400", description = "잘못된 요청 데이터",
+                content = @Content(schema = @Schema(implementation = CustomApiResponse.class))),
+    @ApiResponse(responseCode = "409", description = "중복된 사용자 정보",
+                content = @Content(schema = @Schema(implementation = CustomApiResponse.class)))
 })
 ```
 
@@ -55,7 +146,7 @@ src/main/java/com/bio/bio_backend/
 - **SwaggerConfig.java**: OpenAPI 기본 정보 설정
 - **application.properties**: Swagger UI 커스터마이징
 
-### 3. 트랜잭션 관리
+### 4. 트랜잭션 관리
 
 #### 기본 설정
 
@@ -79,14 +170,14 @@ public class MemberServiceImpl {
 - **메서드별**: 데이터 수정 시에만 `@Transactional` 개별 적용
 - **설정**: `spring.jpa.open-in-view=false` (성능 최적화)
 
-### 4. 오류 등록 및 사용
+### 5. 오류 등록 및 사용
 
 #### 오류 코드 등록
 
 ```java
 // ApiResponseCode.java
 public enum ApiResponseCode {
-    USER_ID_DUPLICATE("400", "이미 존재하는 사용자 ID입니다."),
+    USER_ID_DUPLICATE(HttpStatus.CONFLICT.value(), "User ID already exists"),
 }
 ```
 

src/main/java/com/bio/bio_backend/domain/user/member/controller/MemberController.java

@@ -1,6 +1,7 @@
 package com.bio.bio_backend.domain.user.member.controller;
 
 import com.bio.bio_backend.global.dto.CustomApiResponse;
+import io.swagger.v3.oas.annotations.tags.Tag;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
@@ -22,8 +23,9 @@ import io.swagger.v3.oas.annotations.responses.ApiResponse;
 import io.swagger.v3.oas.annotations.responses.ApiResponses;
 import io.swagger.v3.oas.annotations.media.Content;
 import io.swagger.v3.oas.annotations.media.Schema;
+import com.bio.bio_backend.global.utils.ApiResponseCode;
 
-
+@Tag(name = "Member", description = "회원 관련 API")
 @RestController
 @RequiredArgsConstructor
 @Slf4j
@@ -33,19 +35,21 @@ public class MemberController {
     private final MemberMapper memberMapper;
     private final BCryptPasswordEncoder bCryptPasswordEncoder;
 
-    @Operation(summary = "회원 가입", description = "새로운 회원을 등록합니다.", tags = {"Member"})
+    @Operation(summary = "회원 가입", description = "새로운 회원을 등록합니다.")
     @ApiResponses({
-        @ApiResponse(responseCode = "201", description = "회원 가입 성공", content = @Content(schema = @Schema(implementation = CreateMemberResponseDto.class))),
+        @ApiResponse(responseCode = "201", description = "회원 가입 성공"),
-        @ApiResponse(responseCode = "400", description = "잘못된 요청 데이터", content = @Content(schema = @Schema(implementation = CustomApiResponse.class))),
+        @ApiResponse(responseCode = "400", description = "잘못된 요청 데이터"),
-        @ApiResponse(responseCode = "409", description = "중복된 사용자 정보", content = @Content(schema = @Schema(implementation = CustomApiResponse.class)))
+        @ApiResponse(responseCode = "409", description = "중복된 사용자 정보")
     })
     @PostMapping("/members")
-    public ResponseEntity<CreateMemberResponseDto> createMember(@RequestBody @Valid CreateMemberRequestDto requestDto) {
+    public ResponseEntity<CustomApiResponse<CreateMemberResponseDto>> createMember(@RequestBody @Valid CreateMemberRequestDto requestDto) {
         MemberDto member = memberMapper.toMemberDto(requestDto);
         MemberDto createdMember = memberService.createMember(member);
         CreateMemberResponseDto responseDto = memberMapper.toCreateMemberResponseDto(createdMember);
 
-        return ResponseEntity.status(HttpStatus.CREATED).body(responseDto);
+        CustomApiResponse<CreateMemberResponseDto> apiResponse = CustomApiResponse.success(ApiResponseCode.COMMON_SUCCESS_CREATED, responseDto);
+        
+        return ResponseEntity.status(HttpStatus.CREATED).body(apiResponse);
     }
 
     // @PostMapping("/member/list")

src/main/java/com/bio/bio_backend/global/exception/CustomAuthenticationFailureHandler.java

@@ -40,10 +40,10 @@ public class CustomAuthenticationFailureHandler implements AuthenticationFailure
         if (exception instanceof UsernameNotFoundException) {
             apiResponse = CustomApiResponse.fail(ApiResponseCode.USER_NOT_FOUND, null);
         } else if (exception instanceof BadCredentialsException) {
-            apiResponse = CustomApiResponse.fail(ApiResponseCode.AUTHENTICATION_FAILED, null);
+            apiResponse = CustomApiResponse.fail(ApiResponseCode.COMMON_UNAUTHORIZED, null);
         } else {
             response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
-            apiResponse = CustomApiResponse.fail(ApiResponseCode.INTERNAL_SERVER_ERROR, null);
+            apiResponse = CustomApiResponse.fail(ApiResponseCode.COMMON_INTERNAL_SERVER_ERROR, null);
         }
 
         String jsonResponse = objectMapper.writeValueAsString(apiResponse);

src/main/java/com/bio/bio_backend/global/exception/GlobalExceptionHandler.java

@@ -2,6 +2,7 @@ package com.bio.bio_backend.global.exception;
 
 import java.util.Objects;
 
+import lombok.Getter;
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.web.HttpRequestMethodNotSupportedException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
@@ -17,7 +18,6 @@ import io.jsonwebtoken.MalformedJwtException;
 import io.jsonwebtoken.security.SignatureException;
 import com.bio.bio_backend.global.dto.CustomApiResponse;
 import com.bio.bio_backend.global.utils.ApiResponseCode;
-import com.bio.bio_backend.domain.user.member.exception.UserDuplicateException;
 
 @RestControllerAdvice
 public class GlobalExceptionHandler {
@@ -41,12 +41,12 @@ public class GlobalExceptionHandler {
 
     @ExceptionHandler(IllegalArgumentException.class)
     public CustomApiResponse<Void> handleIllegalArgumentException(IllegalArgumentException e){
-        return CustomApiResponse.fail(ApiResponseCode.ARGUMENT_NOT_VALID, null);
+        return CustomApiResponse.fail(ApiResponseCode.COMMON_ARGUMENT_NOT_VALID, null);
     }
 
     @ExceptionHandler(IndexOutOfBoundsException.class)
     public CustomApiResponse<Void> handleIndexOutOfBoundsException(IndexOutOfBoundsException e){
-        return CustomApiResponse.fail(ApiResponseCode.INDEX_OUT_OF_BOUND, null);
+        return CustomApiResponse.fail(ApiResponseCode.COMMON_INDEX_OUT_OF_BOUND, null);
     }
 
     @ExceptionHandler(SignatureException.class)
@@ -71,7 +71,7 @@ public class GlobalExceptionHandler {
     
     @ExceptionHandler(JsonProcessingException.class)
     public CustomApiResponse<Void> handleExpiredJwtException(JsonProcessingException e) {
-        return CustomApiResponse.fail(ApiResponseCode.JSON_PROCESSING_EXCEPTION, null);
+        return CustomApiResponse.fail(ApiResponseCode.COMMON_JSON_PROCESSING_EXCEPTION, null);
     }
     
     @ExceptionHandler(ApiException.class)
@@ -86,20 +86,9 @@ public class GlobalExceptionHandler {
             .map(error -> new ValidationError(error.getField(), error.getDefaultMessage()))
             .toList();
         
-        return CustomApiResponse.fail(ApiResponseCode.ARGUMENT_NOT_VALID, errors);
+        return CustomApiResponse.fail(ApiResponseCode.COMMON_ARGUMENT_NOT_VALID, errors);
     }
-    
+
     // 검증 오류 상세 정보를 위한 내부 클래스
-    private static class ValidationError {
+    private record ValidationError(String field, String message) { }
-        private final String field;
-        private final String message;
-        
-        public ValidationError(String field, String message) {
-            this.field = field;
-            this.message = message;
-        }
-        
-        public String getField() { return field; }
-        public String getMessage() { return message; }
-    }
 }

src/main/java/com/bio/bio_backend/global/security/JwtTokenFilter.java

@@ -83,7 +83,7 @@ public class JwtTokenFilter extends OncePerRequestFilter {
                 response.setHeader("Authorization", "Bearer " + newAccessToken);
                 filterChain.doFilter(request, response);
             } else {
-                sendJsonResponse(response, CustomApiResponse.fail(ApiResponseCode.All_TOKEN_INVALID, null));
+                sendJsonResponse(response, CustomApiResponse.fail(ApiResponseCode.ALL_TOKEN_INVALID, null));
             }
         } catch (Exception e) {
             request.setAttribute("exception", e);

src/main/java/com/bio/bio_backend/global/utils/ApiResponseCode.java

@@ -12,43 +12,58 @@ import org.springframework.http.HttpStatus;
 @AllArgsConstructor
 public enum ApiResponseCode {
     
-    // 200 OK
-    LOGIN_SUCCESSFUL(HttpStatus.OK.value(), "Login successful"),
-    LOGOUT_SUCCESSFUL(HttpStatus.OK.value(), "Logout successful"),
-    USER_INFO_CHANGE(HttpStatus.OK.value(), "User info update successful"),
-    USER_DELETE_SUCCESSFUL(HttpStatus.OK.value(),  "User delete is successful"),
-
-    // 409 Conflict
-    USER_ID_DUPLICATE(HttpStatus.CONFLICT.value(), "User ID already exists"),
-
     /*공통 Code*/
+    // 200 OK
+    COMMON_SUCCESS(HttpStatus.OK.value(), "요청 성공"),
+    COMMON_SUCCESS_CREATED(HttpStatus.CREATED.value(), "성공적으로 생성되었습니다"),
+    COMMON_SUCCESS_UPDATED(HttpStatus.OK.value(), "성공적으로 수정되었습니다"),
+    COMMON_SUCCESS_DELETED(HttpStatus.OK.value(), "성공적으로 삭제되었습니다"),
+    COMMON_SUCCESS_RETRIEVED(HttpStatus.OK.value(), "성공적으로 조회되었습니다"),
+
     // 400 Bad Request
-    COMMON_BAD_REQUEST(HttpStatus.BAD_REQUEST.value(), "Required request body is missing or Error"),
+    COMMON_BAD_REQUEST(HttpStatus.BAD_REQUEST.value(), "필수 요청 본문이 누락되었거나 오류가 발생했습니다"),
-    COMMON_FORMAT_WRONG(HttpStatus.BAD_REQUEST.value(), "Request format is incorrect"),
+    COMMON_FORMAT_WRONG(HttpStatus.BAD_REQUEST.value(), "요청 형식이 올바르지 않습니다"),
-    ARGUMENT_NOT_VALID(HttpStatus.BAD_REQUEST.value(), "Argument is not valid"),
+    COMMON_ARGUMENT_NOT_VALID(HttpStatus.BAD_REQUEST.value(), "인자가 유효하지 않습니다"),
 
     // 401 Unauthorized
-    COMMON_UNAUTHORIZED(HttpStatus.UNAUTHORIZED.value(), "Unauthorized"),
+    COMMON_UNAUTHORIZED(HttpStatus.UNAUTHORIZED.value(), "인증에 실패했습니다"),
-    USER_NOT_FOUND(HttpStatus.UNAUTHORIZED.value(), "User not found. Authentication failed"),
-    AUTHENTICATION_FAILED(HttpStatus.UNAUTHORIZED.value(), "Password is invalid"),
-    JWT_SIGNATURE_MISMATCH(HttpStatus.UNAUTHORIZED.value(), "JWT signature does not match. Authentication failed"),
-    JWT_TOKEN_NULL(HttpStatus.UNAUTHORIZED.value(), "JWT token is null"),
-    JWT_TOKEN_EXPIRED(HttpStatus.UNAUTHORIZED.value(), "Token is Expired"),
-    All_TOKEN_INVALID(HttpStatus.UNAUTHORIZED.value(), "Access and Refresh tokens are expired or invalid"),
 
     // 403 Forbidden
-    COMMON_FORBIDDEN(HttpStatus.FORBIDDEN.value(), "Access is denied"),
+    COMMON_FORBIDDEN(HttpStatus.FORBIDDEN.value(), "접근이 거부되었습니다"),
 
     // 404 Not Found
-    COMMON_NOT_FOUND(HttpStatus.NOT_FOUND.value(), "Resource is not found"),
+    COMMON_NOT_FOUND(HttpStatus.NOT_FOUND.value(), "리소스를 찾을 수 없습니다"),
 
     // 405 Method Not Allowed
-    COMMON_METHOD_NOT_ALLOWED(HttpStatus.METHOD_NOT_ALLOWED.value(), "Method not Allowed"),
+    COMMON_METHOD_NOT_ALLOWED(HttpStatus.METHOD_NOT_ALLOWED.value(), "허용되지 않는 메소드입니다"),
+
+    // 409 Conflict
+    COMMON_CONFLICT(HttpStatus.CONFLICT.value(), "충돌이 발생했습니다"),
 
     // 500 Internal Server Error
-    INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR.value(), "An error occurred on the server"),
+    COMMON_INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR.value(), "서버에서 오류가 발생했습니다"),
-    INDEX_OUT_OF_BOUND(HttpStatus.INTERNAL_SERVER_ERROR.value(), "Index out of bounds for length"),
+    COMMON_INDEX_OUT_OF_BOUND(HttpStatus.INTERNAL_SERVER_ERROR.value(), "인덱스가 범위를 벗어났습니다"),
-	JSON_PROCESSING_EXCEPTION(HttpStatus.INTERNAL_SERVER_ERROR.value(), "Check if it is a valid JSON format");
+    COMMON_JSON_PROCESSING_EXCEPTION(HttpStatus.INTERNAL_SERVER_ERROR.value(), "유효한 JSON 형식인지 확인해주세요"),
+
+    /*사용자 관련 Code*/
+    // 200 OK
+    LOGIN_SUCCESSFUL(HttpStatus.OK.value(), "로그인에 성공했습니다"),
+    LOGOUT_SUCCESSFUL(HttpStatus.OK.value(), "로그아웃에 성공했습니다"),
+    USER_INFO_CHANGE(HttpStatus.OK.value(), "사용자 정보가 성공적으로 수정되었습니다"),
+    USER_DELETE_SUCCESSFUL(HttpStatus.OK.value(), "사용자가 성공적으로 삭제되었습니다"),
+
+    // 409 Conflict
+    USER_ID_DUPLICATE(HttpStatus.CONFLICT.value(), "이미 존재하는 사용자 ID입니다"),
+
+    // 401 Unauthorized
+    USER_NOT_FOUND(HttpStatus.UNAUTHORIZED.value(), "사용자를 찾을 수 없습니다. 인증에 실패했습니다"),
+    USER_PASSWORD_INVALID(HttpStatus.UNAUTHORIZED.value(), "비밀번호가 올바르지 않습니다"),
+
+    // JWT 관련
+    JWT_SIGNATURE_MISMATCH(HttpStatus.UNAUTHORIZED.value(), "JWT 서명이 일치하지 않습니다. 인증에 실패했습니다"),
+    JWT_TOKEN_NULL(HttpStatus.UNAUTHORIZED.value(), "JWT 토큰이 null입니다"),
+    JWT_TOKEN_EXPIRED(HttpStatus.UNAUTHORIZED.value(), "토큰이 만료되었습니다"),
+    ALL_TOKEN_INVALID(HttpStatus.UNAUTHORIZED.value(), "액세스 토큰과 리프레시 토큰이 모두 만료되었거나 유효하지 않습니다");
 
     private final int statusCode;
     private final String description;