[BE] refactor: 코드 포맷 적용, 컨벤션 적용

backend/src/main/java/com/funeat/FuneatApplication.java

@@ -6,8 +6,8 @@
 @SpringBootApplication
 public class FuneatApplication {
 
-	public static void main(String[] args) {
-		SpringApplication.run(FuneatApplication.class, args);
-	}
+    public static void main(String[] args) {
+        SpringApplication.run(FuneatApplication.class, args);
+    }
 
 }

backend/src/main/java/com/funeat/auth/presentation/AuthController.java

@@ -29,14 +29,14 @@ public interface AuthController {
             description = "기존 회원이면 홈으로 이동, 신규 회원이면 마이페이지로 이동."
     )
     @GetMapping
-    ResponseEntity<Void> loginAuthorizeUser(@RequestParam("code") String code, HttpServletRequest request);
+    ResponseEntity<Void> loginAuthorizeUser(@RequestParam("code") final String code, final HttpServletRequest request);
 
     @Operation(summary = "로그아웃", description = "로그아웃을 한다")
     @ApiResponse(
             responseCode = "302",
             description = "로그아웃 성공."
     )
     @PostMapping
-    ResponseEntity<Void> logout(@AuthenticationPrincipal LoginInfo loginInfo, HttpServletRequest request,
-                                HttpServletResponse response);
+    ResponseEntity<Void> logout(@AuthenticationPrincipal final LoginInfo loginInfo, final HttpServletRequest request,
+                                final HttpServletResponse response);
 }

backend/src/main/java/com/funeat/auth/util/KakaoPlatformUserProvider.java

@@ -33,20 +33,20 @@ public class KakaoPlatformUserProvider implements PlatformUserProvider {
 
     private final RestTemplate restTemplate;
     private final ObjectMapper objectMapper;
-    private final String kakaoRestApiKey;
-    private final String redirectUri;
-    private final String kakaoAdminKey;
+
+    @Value("${kakao.rest-api-key}")
+    private String kakaoRestApiKey;
+
+    @Value("${kakao.redirect-uri}")
+    private String redirectUri;
+
+    @Value("${kakao.admin-key}")
+    private String kakaoAdminKey;
 
     public KakaoPlatformUserProvider(final RestTemplateBuilder restTemplateBuilder,
-                                     final ObjectMapper objectMapper,
-                                     @Value("${kakao.rest-api-key}") final String kakaoRestApiKey,
-                                     @Value("${kakao.redirect-uri}") final String redirectUri,
-                                     @Value("${kakao.admin-key}") final String kakaoAdminKey) {
+                                     final ObjectMapper objectMapper) {
         this.restTemplate = restTemplateBuilder.build();
         this.objectMapper = objectMapper;
-        this.kakaoRestApiKey = kakaoRestApiKey;
-        this.redirectUri = redirectUri;
-        this.kakaoAdminKey = kakaoAdminKey;
     }
 
     @Override
@@ -118,10 +118,10 @@ private KakaoUserInfoDto convertJsonToKakaoUserDto(final String responseBody) {
 
     @Override
     public String getRedirectURI() {
-        final StringJoiner joiner = new StringJoiner("&");
-        joiner.add("response_type=code");
-        joiner.add("client_id=" + kakaoRestApiKey);
-        joiner.add("redirect_uri=" + redirectUri);
+        final StringJoiner joiner = new StringJoiner("&")
+                .add("response_type=code")
+                .add("client_id=" + kakaoRestApiKey)
+                .add("redirect_uri=" + redirectUri);
 
         return AUTHORIZATION_BASE_URL + OAUTH_URI + "?" + joiner;
     }

backend/src/main/java/com/funeat/common/CustomPageableHandlerMethodArgumentResolver.java

@@ -14,8 +14,8 @@
 public class CustomPageableHandlerMethodArgumentResolver extends PageableHandlerMethodArgumentResolver {
 
     @Override
-    public Pageable resolveArgument(MethodParameter methodParameter, ModelAndViewContainer mavContainer,
-                                    NativeWebRequest webRequest, WebDataBinderFactory binderFactory) {
+    public Pageable resolveArgument(final MethodParameter methodParameter, final ModelAndViewContainer mavContainer,
+                                    final NativeWebRequest webRequest, final WebDataBinderFactory binderFactory) {
         final Pageable pageable = super.resolveArgument(methodParameter, mavContainer, webRequest, binderFactory);
 
         final Sort lastPrioritySort = Sort.by("id").descending();

backend/src/main/java/com/funeat/common/WebConfig.java

@@ -51,7 +51,7 @@ public void addFormatters(final FormatterRegistry registry) {
     }
 
     @Override
-    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
+    public void addArgumentResolvers(final List<HandlerMethodArgumentResolver> resolvers) {
         resolvers.add(customPageableHandlerMethodArgumentResolver);
         resolvers.add(authArgumentResolver);
     }

backend/src/main/java/com/funeat/common/s3/S3Uploader.java

@@ -10,6 +10,7 @@
 import com.funeat.common.exception.CommonException.NotAllowedFileExtensionException;
 import com.funeat.common.exception.CommonException.S3UploadFailException;
 import java.io.IOException;
+import java.util.List;
 import java.util.UUID;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Profile;
@@ -20,8 +21,7 @@
 @Profile("!test")
 public class S3Uploader implements ImageUploader {
 
-    public static final String JPEG = "image/jpeg";
-    public static final String PNG = "image/png";
+    private static final List<String> INCLUDE_EXTENSIONS = List.of("image/jpeg", "image/png");
 
     @Value("${cloud.aws.s3.bucket}")
     private String bucket;
@@ -55,7 +55,7 @@ public String upload(final MultipartFile image) {
 
     private void validateExtension(final MultipartFile image) {
         final String contentType = image.getContentType();
-        if (!contentType.equals(JPEG) && !contentType.equals(PNG)) {
+        if (!INCLUDE_EXTENSIONS.contains(contentType)){
             throw new NotAllowedFileExtensionException(IMAGE_EXTENSION_ERROR_CODE, contentType);
         }
     }

backend/src/main/java/com/funeat/exception/presentation/GlobalControllerAdvice.java

@@ -24,6 +24,9 @@
 @RestControllerAdvice
 public class GlobalControllerAdvice {
 
+    private static final String ERROR_MESSAGE_DELIMITER = ", ";
+    private static final String RESPONSE_DELIMITER = ". ";
+
     private final Logger log = LoggerFactory.getLogger(this.getClass());
     private final ObjectMapper objectMapper;
 
@@ -50,9 +53,9 @@ public ResponseEntity<?> handleParamValidationException(final MethodArgumentNotV
                 .getAllErrors()
                 .stream()
                 .map(DefaultMessageSourceResolvable::getDefaultMessage)
-                .collect(Collectors.joining(", "));
+                .collect(Collectors.joining(ERROR_MESSAGE_DELIMITER));
 
-        final String responseErrorMessage = errorMessage + ". " + REQUEST_VALID_ERROR_CODE.getMessage();
+        final String responseErrorMessage = errorMessage + RESPONSE_DELIMITER + REQUEST_VALID_ERROR_CODE.getMessage();
 
         final ErrorCode<?> errorCode = new ErrorCode<>(REQUEST_VALID_ERROR_CODE.getCode(), responseErrorMessage);
 
@@ -66,7 +69,7 @@ private static String getMethodArgumentExceptionLogMessage(final MethodArgumentN
                 .getFieldErrors()
                 .stream()
                 .map(FieldError::getField)
-                .collect(Collectors.joining(", "));
+                .collect(Collectors.joining(ERROR_MESSAGE_DELIMITER));
 
         return filedErrorMessages + " 요청 실패";
     }

backend/src/main/java/com/funeat/member/dto/MemberRecipeDto.java

@@ -1,12 +1,10 @@
 package com.funeat.member.dto;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
-import com.funeat.product.domain.Product;
 import com.funeat.recipe.domain.Recipe;
 import com.funeat.recipe.domain.RecipeImage;
 import java.time.LocalDateTime;
 import java.util.List;
-import java.util.stream.Collectors;
 
 public class MemberRecipeDto {
 

backend/src/main/java/com/funeat/member/dto/MemberReviewDto.java

@@ -13,8 +13,8 @@ public class MemberReviewDto {
     private final Long favoriteCount;
 
     private MemberReviewDto(final Long reviewId, final Long productId, final String categoryType,
-                           final String productName, final String content,
-                           final Long rating, final Long favoriteCount) {
+                            final String productName, final String content,
+                            final Long rating, final Long favoriteCount) {
         this.reviewId = reviewId;
         this.productId = productId;
         this.categoryType = categoryType;

backend/src/main/java/com/funeat/member/presentation/MemberApiController.java

@@ -38,9 +38,7 @@ public MemberApiController(final MemberService memberService, final ReviewServic
 
     @GetMapping
     public ResponseEntity<MemberProfileResponse> getMemberProfile(@AuthenticationPrincipal final LoginInfo loginInfo) {
-        final Long memberId = loginInfo.getId();
-
-        final MemberProfileResponse response = memberService.getMemberProfile(memberId);
+        final MemberProfileResponse response = memberService.getMemberProfile(loginInfo.getId());
 
         return ResponseEntity.ok(response);
     }
@@ -49,9 +47,7 @@ public ResponseEntity<MemberProfileResponse> getMemberProfile(@AuthenticationPri
     public ResponseEntity<Void> putMemberProfile(@AuthenticationPrincipal final LoginInfo loginInfo,
                                                  @RequestPart(required = false) final MultipartFile image,
                                                  @RequestPart @Valid final MemberRequest memberRequest) {
-        final Long memberId = loginInfo.getId();
-
-        memberService.modify(memberId, image, memberRequest);
+        memberService.modify(loginInfo.getId(), image, memberRequest);
 
         return ResponseEntity.ok().build();
     }

backend/src/main/java/com/funeat/member/presentation/MemberController.java

@@ -26,7 +26,7 @@ public interface MemberController {
             description = "사용자 정보 조회 성공."
     )
     @GetMapping
-    ResponseEntity<MemberProfileResponse> getMemberProfile(@AuthenticationPrincipal LoginInfo loginInfo);
+    ResponseEntity<MemberProfileResponse> getMemberProfile(@AuthenticationPrincipal final LoginInfo loginInfo);
 
     @Operation(summary = "사용자 정보 수정", description = "사용자 닉네임과 프로필 사진을 수정한다.")
     @ApiResponse(
@@ -44,15 +44,15 @@ public ResponseEntity<Void> putMemberProfile(@AuthenticationPrincipal final Logi
             description = "사용자 리뷰 조회 성공."
     )
     @GetMapping
-    ResponseEntity<MemberReviewsResponse> getMemberReview(@AuthenticationPrincipal LoginInfo loginInfo,
-                                                          @PageableDefault Pageable pageable);
+    ResponseEntity<MemberReviewsResponse> getMemberReview(@AuthenticationPrincipal final LoginInfo loginInfo,
+                                                          @PageableDefault final Pageable pageable);
 
     @Operation(summary = "사용자 꿀조합 조회", description = "사용자가 작성한 꿀조합을 조회한다.")
     @ApiResponse(
             responseCode = "200",
             description = "사용자 꿀조합 조회 성공."
     )
     @GetMapping
-    ResponseEntity<MemberRecipesResponse> getMemberRecipe(@AuthenticationPrincipal LoginInfo loginInfo,
-                                                          @PageableDefault Pageable pageable);
+    ResponseEntity<MemberRecipesResponse> getMemberRecipe(@AuthenticationPrincipal final LoginInfo loginInfo,
+                                                          @PageableDefault final Pageable pageable);
 }

backend/src/main/java/com/funeat/product/application/ProductService.java

@@ -32,6 +32,7 @@
 import com.funeat.tag.domain.Tag;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Objects;
 import java.util.stream.Collectors;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
@@ -46,6 +47,7 @@ public class ProductService {
     private static final int THREE = 3;
     private static final int TOP = 0;
     public static final String REVIEW_COUNT = "reviewCount";
+    private static final int RANKING_SIZE = 3;
 
     private final CategoryRepository categoryRepository;
     private final ProductRepository productRepository;
@@ -82,7 +84,7 @@ public ProductsInCategoryResponse getAllProductsInCategory(final Long categoryId
     }
 
     private Page<ProductInCategoryDto> getAllProductsInCategory(final Pageable pageable, final Category category) {
-        if (pageable.getSort().getOrderFor(REVIEW_COUNT) != null) {
+        if (Objects.nonNull(pageable.getSort().getOrderFor(REVIEW_COUNT))) {
             final PageRequest pageRequest = PageRequest.of(pageable.getPageNumber(), pageable.getPageSize());
             return productRepository.findAllByCategoryOrderByReviewCountDesc(category, pageRequest);
         }
@@ -106,7 +108,7 @@ public RankingProductsResponse getTop3Products() {
 
         final List<RankingProductDto> rankingProductDtos = productsAndReviewCounts.stream()
                 .sorted(rankingScoreComparator)
-                .limit(3)
+                .limit(RANKING_SIZE)
                 .map(it -> RankingProductDto.toDto(it.getProduct()))
                 .collect(Collectors.toList());
 
@@ -125,7 +127,8 @@ public SearchProductsResponse searchProducts(final String query, final Pageable
     }
 
     public SearchProductResultsResponse getSearchResults(final String query, final Pageable pageable) {
-        final Page<ProductReviewCountDto> products = productRepository.findAllWithReviewCountByNameContaining(query, pageable);
+        final Page<ProductReviewCountDto> products = productRepository.findAllWithReviewCountByNameContaining(query,
+                pageable);
 
         final PageDto pageDto = PageDto.toDto(products);
         final List<SearchProductResultDto> resultDtos = products.stream()

backend/src/main/java/com/funeat/product/domain/Product.java

@@ -3,7 +3,6 @@
 import com.funeat.member.domain.bookmark.ProductBookmark;
 import com.funeat.review.domain.Review;
 import java.util.List;
-import java.util.Objects;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
@@ -80,10 +79,6 @@ public void updateImage(final String topFavoriteImage) {
         this.image = topFavoriteImage;
     }
 
-    public boolean isNotEqualImage(final String anotherImage) {
-        return !Objects.equals(this.image, anotherImage);
-    }
-
     public Long getId() {
         return id;
     }

backend/src/main/java/com/funeat/product/persistence/ProductRepository.java

@@ -13,22 +13,23 @@
 
 public interface ProductRepository extends JpaRepository<Product, Long> {
 
-    @Query(value = "SELECT new com.funeat.product.dto.ProductInCategoryDto(p.id, p.name, p.price, p.image, p.averageRating, COUNT(r)) " +
-            "FROM Product p " +
-            "LEFT JOIN p.reviews r " +
-            "WHERE p.category = :category " +
-            "GROUP BY p ",
+    @Query(value = "SELECT new com.funeat.product.dto.ProductInCategoryDto(p.id, p.name, p.price, p.image, p.averageRating, COUNT(r)) "
+            + "FROM Product p "
+            + "LEFT JOIN p.reviews r "
+            + "WHERE p.category = :category "
+            + "GROUP BY p ",
             countQuery = "SELECT COUNT(p) FROM Product p WHERE p.category = :category")
     Page<ProductInCategoryDto> findAllByCategory(@Param("category") final Category category, final Pageable pageable);
 
-    @Query(value = "SELECT new com.funeat.product.dto.ProductInCategoryDto(p.id, p.name, p.price, p.image, p.averageRating, COUNT(r)) " +
-            "FROM Product p " +
-            "LEFT JOIN p.reviews r " +
-            "WHERE p.category = :category " +
-            "GROUP BY p " +
-            "ORDER BY COUNT(r) DESC, p.id DESC ",
+    @Query(value = "SELECT new com.funeat.product.dto.ProductInCategoryDto(p.id, p.name, p.price, p.image, p.averageRating, COUNT(r)) "
+                    + "FROM Product p "
+                    + "LEFT JOIN p.reviews r "
+                    + "WHERE p.category = :category "
+                    + "GROUP BY p "
+                    + "ORDER BY COUNT(r) DESC, p.id DESC ",
             countQuery = "SELECT COUNT(p) FROM Product p WHERE p.category = :category")
-    Page<ProductInCategoryDto> findAllByCategoryOrderByReviewCountDesc(@Param("category") final Category category, final Pageable pageable);
+    Page<ProductInCategoryDto> findAllByCategoryOrderByReviewCountDesc(@Param("category") final Category category,
+                                                                       final Pageable pageable);
 
     @Query("SELECT new com.funeat.product.dto.ProductReviewCountDto(p, COUNT(r.id)) "
             + "FROM Product p "
@@ -50,5 +51,6 @@ public interface ProductRepository extends JpaRepository<Product, Long> {
             + "GROUP BY p.id "
             + "ORDER BY "
             + "(CASE WHEN p.name LIKE CONCAT(:name, '%') THEN 1 ELSE 2 END), p.id DESC")
-    Page<ProductReviewCountDto> findAllWithReviewCountByNameContaining(@Param("name") final String name, final Pageable pageable);
+    Page<ProductReviewCountDto> findAllWithReviewCountByNameContaining(@Param("name") final String name,
+                                                                       final Pageable pageable);
 }

backend/src/main/java/com/funeat/product/presentation/ProductApiController.java

@@ -29,7 +29,7 @@ public ProductApiController(final ProductService productService) {
 
     @GetMapping("/categories/{categoryId}/products")
     public ResponseEntity<ProductsInCategoryResponse> getAllProductsInCategory(@PathVariable final Long categoryId,
-                                                                               @PageableDefault Pageable pageable) {
+                                                                               @PageableDefault final Pageable pageable) {
         final ProductsInCategoryResponse response = productService.getAllProductsInCategory(categoryId, pageable);
         return ResponseEntity.ok(response);
     }

backend/src/main/java/com/funeat/product/presentation/ProductController.java

@@ -26,7 +26,7 @@ public interface ProductController {
     )
     @GetMapping
     ResponseEntity<ProductsInCategoryResponse> getAllProductsInCategory(
-            @PathVariable(name = "category_id") final Long categoryId, @PageableDefault Pageable pageable
+            @PathVariable(name = "category_id") final Long categoryId, @PageableDefault final Pageable pageable
     );
 
     @Operation(summary = "해당 상품 상세 조회", description = "해당 상품 상세정보를 조회한다.")

backend/src/main/java/com/funeat/recipe/dto/RankingRecipeDto.java

@@ -26,7 +26,8 @@ public static RankingRecipeDto toDto(final Recipe recipe, final List<RecipeImage
         if (images.isEmpty()) {
             return new RankingRecipeDto(recipe.getId(), null, recipe.getTitle(), author, recipe.getFavoriteCount());
         }
-        return new RankingRecipeDto(recipe.getId(), images.get(0).getImage(), recipe.getTitle(), author, recipe.getFavoriteCount());
+        return new RankingRecipeDto(recipe.getId(), images.get(0).getImage(), recipe.getTitle(), author,
+                recipe.getFavoriteCount());
     }
 
     public Long getId() {

backend/src/main/java/com/funeat/recipe/presentation/RecipeController.java

@@ -33,9 +33,9 @@ public interface RecipeController {
             description = "꿀조합 작성 성공."
     )
     @PostMapping
-    ResponseEntity<Void> writeRecipe(@AuthenticationPrincipal LoginInfo loginInfo,
-                                     @RequestPart List<MultipartFile> images,
-                                     @RequestPart RecipeCreateRequest recipeRequest);
+    ResponseEntity<Void> writeRecipe(@AuthenticationPrincipal final LoginInfo loginInfo,
+                                     @RequestPart final List<MultipartFile> images,
+                                     @RequestPart final RecipeCreateRequest recipeRequest);
 
     @Operation(summary = "꿀조합 상세 조회", description = "꿀조합의 상세 정보를 조회한다.")
     @ApiResponse(
@@ -52,7 +52,7 @@ ResponseEntity<RecipeDetailResponse> getRecipeDetail(@AuthenticationPrincipal fi
             description = "꿀조합 목록 조회 성공."
     )
     @GetMapping
-    ResponseEntity<SortingRecipesResponse> getSortingRecipes(@PageableDefault Pageable pageable);
+    ResponseEntity<SortingRecipesResponse> getSortingRecipes(@PageableDefault final Pageable pageable);
 
     @Operation(summary = "꿀조합 좋아요", description = "꿀조합에 좋아요 또는 취소를 한다.")
     @ApiResponse(
@@ -62,7 +62,7 @@ ResponseEntity<RecipeDetailResponse> getRecipeDetail(@AuthenticationPrincipal fi
     @PatchMapping
     ResponseEntity<Void> likeRecipe(@AuthenticationPrincipal final LoginInfo loginInfo,
                                     @PathVariable final Long recipeId,
-                                    @RequestBody RecipeFavoriteRequest request);
+                                    @RequestBody final RecipeFavoriteRequest request);
 
     @Operation(summary = "꿀조합 랭킹 조회", description = "전체 꿀조합들 중에서 랭킹 TOP3를 조회한다.")
     @ApiResponse(