🐛Fix: 게시글 생성 시 user 저장 및 jjwt 0.13.0 API 호환성 수정

- 게시글 생성 시 user 정보가 저장되지 않던 문제 수정
- jjwt 0.13.0 API에 맞게 JwtProvider 수정 (deprecated API 제거)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: imjuyongp

src/main/java/com/be/sportizebe/domain/post/controller/PostController.java

@@ -31,7 +31,10 @@ public class PostController {
     public ResponseEntity<BaseResponse<PostResponse>> createPost(
         @Parameter(description = "게시판 종류 (SOCCER, BASKETBALL, FREE)") @PathVariable PostProperty property,
         @RequestBody @Valid CreatePostRequest request) {
-        PostResponse response = postService.createPost(property, request);
+        // TODO: 인증 로직 개발 후 @AuthenticationPrincipal User user로 변경
+        User user = userRepository.findById(1L)
+            .orElseThrow(() -> new RuntimeException("테스트 유저가 없습니다. users 테이블에 id=1인 유저를 추가해주세요."));
+        PostResponse response = postService.createPost(property, request, user);
         return ResponseEntity.status(HttpStatus.CREATED)
             .body(BaseResponse.success("게시글 생성 성공", response));
     }

src/main/java/com/be/sportizebe/domain/post/dto/request/CreatePostRequest.java

@@ -2,6 +2,7 @@
 
 import com.be.sportizebe.domain.post.entity.Post;
 import com.be.sportizebe.domain.post.entity.PostProperty;
+import com.be.sportizebe.domain.user.entity.User;
 import jakarta.validation.constraints.NotBlank;
 import lombok.Builder;
 
@@ -12,13 +13,14 @@ public record CreatePostRequest(
     boolean isAnonymous,
     String imgUrl) {
 
-  public Post toEntity(PostProperty property) { // DTO -> Entity 변환
+  public Post toEntity(PostProperty property, User user) { // DTO -> Entity 변환
     return Post.builder()
         .title(title)
         .content(content)
         .isAnonymous(isAnonymous)
         .imgUrl(imgUrl)
         .property(property)
+        .user(user)
         .build();
   }
 }

src/main/java/com/be/sportizebe/domain/post/service/PostService.java

@@ -7,7 +7,7 @@
 import com.be.sportizebe.domain.user.entity.User;
 
 public interface PostService {
-  PostResponse createPost(PostProperty property, CreatePostRequest request); // 게시글 생성
+  PostResponse createPost(PostProperty property, CreatePostRequest request, User user); // 게시글 생성
 
   PostResponse updatePost(Long postId, UpdatePostRequest request, User user); // 게시글 수정
 

src/main/java/com/be/sportizebe/domain/post/service/PostServiceImpl.java

@@ -23,8 +23,8 @@ public class PostServiceImpl implements PostService {
 
   @Override
   @Transactional
-  public PostResponse createPost(PostProperty property, CreatePostRequest request) {
-    Post post = request.toEntity(property); // 요청 dto 데이터를 entity로 변환
+  public PostResponse createPost(PostProperty property, CreatePostRequest request, User user) {
+    Post post = request.toEntity(property, user); // 요청 dto 데이터를 entity로 변환
 
     Post savedPost = postRepository.save(post); // db에 저장
 

src/main/java/com/be/sportizebe/global/jwt/JwtProvider.java

@@ -4,13 +4,14 @@
 import com.be.sportizebe.global.exception.CustomException;
 import io.jsonwebtoken.*;
 import io.jsonwebtoken.security.Keys;
+import io.jsonwebtoken.security.SecurityException;
 import jakarta.annotation.PostConstruct;
 import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
 
-import java.security.Key;
+import javax.crypto.SecretKey;
 import java.util.Base64;
 import java.util.Date;
 import java.util.UUID;
@@ -19,7 +20,7 @@
 @Component
 public class JwtProvider {
 
-  private Key key;
+  private SecretKey key;
   private final String secretKey;
   @Getter private final long accessTokenExpireTime;
   @Getter private final long refreshTokenExpireTime;
@@ -50,11 +51,11 @@ public String createRefreshToken(Long userId) {
   private String createToken(Long userId, long expireTimeMillis) {
     Date now = new Date();
     return Jwts.builder()
-        .setSubject(String.valueOf(userId))
-        .setId(UUID.randomUUID().toString())
-        .setIssuedAt(now)
-        .setExpiration(new Date(now.getTime() + expireTimeMillis))
-        .signWith(key, SignatureAlgorithm.HS256)
+        .subject(String.valueOf(userId))
+        .id(UUID.randomUUID().toString())
+        .issuedAt(now)
+        .expiration(new Date(now.getTime() + expireTimeMillis))
+        .signWith(key, Jwts.SIG.HS256)
         .compact();
   }
 
@@ -68,7 +69,7 @@ public boolean validateToken(String token) {
       throw new CustomException(AuthErrorCode.UNSUPPORTED_TOKEN);
     } catch (MalformedJwtException e) {
       throw new CustomException(AuthErrorCode.MALFORMED_JWT_TOKEN);
-    } catch (io.jsonwebtoken.SignatureException e) {
+    } catch (SecurityException e) {
       throw new CustomException(AuthErrorCode.INVALID_SIGNATURE);
     } catch (IllegalArgumentException e) {
       throw new CustomException(AuthErrorCode.ILLEGAL_ARGUMENT);
@@ -86,6 +87,6 @@ public String extractTokenId(String token) {
   }
 
   private Claims parseClaims(String token) {
-    return Jwts.parserBuilder().setSigningKey(key).build().parseClaimsJws(token).getBody();
+    return Jwts.parser().verifyWith(key).build().parseSignedClaims(token).getPayload();
   }
 }