refac: filter 에러 응답 형태 통일

src/main/java/com/evenly/took/global/exception/auth/jwt/AuthErrorCode.java

@@ -14,6 +14,7 @@ public enum AuthErrorCode implements ErrorCode {
 	OAUTH_TYPE_NOT_FOUND(HttpStatus.NOT_FOUND, "OAuth 타입을 찾을 수 없습니다."),
 	JWT_UNAUTHORIZED(HttpStatus.UNAUTHORIZED, "JWT를 찾을 수 없습니다."),
 	EXPIRED_REFRESH_TOKEN(HttpStatus.UNAUTHORIZED, "refresh token이 만료되었습니다."),
+	EXPIRED_ACCESS_TOKEN(HttpStatus.UNAUTHORIZED, "access token이 만료되었습니다."),
 	INVALID_ACCESS_TOKEN(HttpStatus.UNAUTHORIZED, "access token이 유효하지 않습니다."),
 	;
 

src/main/java/com/evenly/took/global/exception/dto/ErrorResponse.java

@@ -5,15 +5,19 @@
 import org.springframework.http.HttpStatus;
 
 import com.evenly.took.global.exception.ErrorCode;
+import com.fasterxml.jackson.annotation.JsonFormat;
 
 import lombok.Getter;
+import lombok.NoArgsConstructor;
 
 @Getter
+@NoArgsConstructor
 public class ErrorResponse {
 
-	private final HttpStatus status;
-	private final String message;
-	private final LocalDateTime timestamp;
+	private HttpStatus status;
+	private String message;
+	@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
+	private LocalDateTime timestamp;
 
 	protected ErrorResponse(ErrorCode errorCode) {
 		this.status = errorCode.getStatus();

src/main/java/com/evenly/took/global/response/SuccessResponse.java

@@ -4,6 +4,8 @@
 
 import org.springframework.http.HttpStatus;
 
+import com.fasterxml.jackson.annotation.JsonFormat;
+
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -17,6 +19,7 @@ public class SuccessResponse<T> {
 
 	private final HttpStatus status;
 	private final String message;
+	@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd HH:mm:ss")
 	private final LocalDateTime timestamp;
 	private final T data;
 

src/main/java/com/evenly/took/global/security/auth/AuthenticationFilter.java

@@ -1,14 +1,21 @@
 package com.evenly.took.global.security.auth;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 
+import org.springframework.http.MediaType;
 import org.springframework.stereotype.Component;
 import org.springframework.web.filter.OncePerRequestFilter;
 
 import com.evenly.took.feature.auth.api.HeaderHandler;
 import com.evenly.took.feature.auth.application.TokenProvider;
+import com.evenly.took.global.exception.ErrorCode;
 import com.evenly.took.global.exception.TookException;
+import com.evenly.took.global.exception.auth.jwt.AuthErrorCode;
+import com.evenly.took.global.exception.dto.ErrorResponse;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
@@ -20,15 +27,20 @@
 @RequiredArgsConstructor
 public class AuthenticationFilter extends OncePerRequestFilter {
 
+	private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
 	private static final List<String> EXCLUDE_PATHS = List.of(
 		"/swagger-ui",
 		"/v3/api-docs",
 		"/public",
 		"/api/health",
 		"/api/oauth");
 
-	private final TokenProvider tokenProvider;
+	static {
+		OBJECT_MAPPER.registerModule(new JavaTimeModule());
+	}
+
 	private final HeaderHandler headerHandler;
+	private final TokenProvider tokenProvider;
 
 	@Override
 	protected boolean shouldNotFilter(HttpServletRequest request) {
@@ -46,12 +58,25 @@ protected void doFilterInternal(
 			checkTokens(request);
 			filterChain.doFilter(request, response);
 		} catch (TookException ex) {
-			response.sendError(HttpServletResponse.SC_UNAUTHORIZED, ex.getMessage()); // TODO 형식 통일
+			AuthErrorCode errorCode = AuthErrorCode.EXPIRED_ACCESS_TOKEN;
+			sendError(response, errorCode);
 		}
 	}
 
 	private void checkTokens(HttpServletRequest request) {
 		String accessToken = headerHandler.resolveAccessToken(request);
 		tokenProvider.validateAccessToken(accessToken);
 	}
+
+	private void sendError(HttpServletResponse response, ErrorCode errorCode) throws IOException {
+		response.setStatus(errorCode.getStatus().value());
+		response.setContentType(MediaType.APPLICATION_JSON_VALUE);
+		response.setCharacterEncoding(StandardCharsets.UTF_8.displayName());
+		String body = serialize(ErrorResponse.of(errorCode));
+		response.getWriter().write(body);
+	}
+
+	private String serialize(ErrorResponse responseBody) throws IOException {
+		return OBJECT_MAPPER.writeValueAsString(responseBody);
+	}
 }