diff --git a/build.gradle b/build.gradle
index 8e950f8..af50701 100644
--- a/build.gradle
+++ b/build.gradle
@@ -54,6 +54,7 @@ dependencies {
 	implementation 'io.jsonwebtoken:jjwt-api:0.11.2'
 	implementation 'io.jsonwebtoken:jjwt-impl:0.11.2'
 	implementation 'io.jsonwebtoken:jjwt-gson:0.11.2'
+//	runtimeOnly 'io.jsonwebtoken:jjwt-jackson:0.11.5'
 }
 
 tasks.named('test') {
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/controller/FileController.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/controller/FileController.java
index dc9096b..206379a 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/controller/FileController.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/controller/FileController.java
@@ -23,12 +23,12 @@ public class FileController {
     private final FileService fileService;
 
     @PostMapping
-    public ResponseData<List<FileRes>> fileUpload(@RequestParam Long id, @RequestParam FileCategory fileCategory, @RequestPart List<MultipartFile> fileList) {
-        return fileService.fileUpload(id, fileCategory, fileList);
+    public ResponseData<List<FileRes>> fileUpload(@RequestParam Long id, @RequestParam FileCategory file_category, @RequestPart List<MultipartFile> file_list) {
+        return fileService.fileUpload(id, file_category, file_list);
     }
 
     @GetMapping("{id}")
-    public ResponseData<List<FileRes>> getFiles(@PathVariable Long id, @RequestParam FileCategory fileCategory) {
-        return fileService.getFiles(id, fileCategory);
+    public ResponseData<List<FileRes>> getFiles(@PathVariable Long id, @RequestParam FileCategory file_category) {
+        return fileService.getFiles(id, file_category);
     }
 }
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/dto/FileRes.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/dto/FileRes.java
index 9cd96fd..ea389d7 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/dto/FileRes.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/dto/FileRes.java
@@ -3,7 +3,6 @@
 import kr.hs.dgsw.SOPO_server_v2.domain.file.entity.FileEntity;
 import lombok.Builder;
 
-@Builder
 public record FileRes (
     String fileName,
     String fileUrl
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/entity/FileEntity.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/entity/FileEntity.java
index 8e4f7b2..d85be88 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/entity/FileEntity.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/entity/FileEntity.java
@@ -17,9 +17,11 @@
 import kr.hs.dgsw.SOPO_server_v2.global.common.entity.BaseTimeEntity;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
+import lombok.Setter;
 import lombok.experimental.SuperBuilder;
 
 @Getter
+@Setter
 @Entity
 @Table(name = "tbl_file")
 @NoArgsConstructor
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/repository/FileRepository.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/repository/FileRepository.java
index 12e6ba9..65eb68a 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/repository/FileRepository.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/repository/FileRepository.java
@@ -6,6 +6,6 @@
 import java.util.List;
 
 public interface FileRepository extends JpaRepository<FileEntity, Long> {
-    List<FileEntity> findByBoard_BoardId(Long boardId);
-    List<FileEntity> findByContest_ContestId(Long contestId);
+    List<FileEntity> findByBoardBoardId(Long boardId);
+    List<FileEntity> findByContestContestId(Long contestId);
 }
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/service/FileService.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/service/FileService.java
index f2dca8a..1713137 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/service/FileService.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/service/FileService.java
@@ -1,8 +1,5 @@
 package kr.hs.dgsw.SOPO_server_v2.domain.file.service;
 
-import com.amazonaws.services.s3.AmazonS3;
-import com.amazonaws.services.s3.model.ObjectMetadata;
-import com.amazonaws.services.s3.model.PutObjectRequest;
 import kr.hs.dgsw.SOPO_server_v2.domain.board.entity.BoardEntity;
 import kr.hs.dgsw.SOPO_server_v2.domain.board.repository.BoardRepository;
 import kr.hs.dgsw.SOPO_server_v2.domain.contest.entity.ContestEntity;
@@ -11,119 +8,78 @@
 import kr.hs.dgsw.SOPO_server_v2.domain.file.entity.FileEntity;
 import kr.hs.dgsw.SOPO_server_v2.domain.file.enums.FileCategory;
 import kr.hs.dgsw.SOPO_server_v2.domain.file.repository.FileRepository;
+import kr.hs.dgsw.SOPO_server_v2.global.common.aws.S3Service;
+import kr.hs.dgsw.SOPO_server_v2.global.common.aws.dto.S3Res;
 import kr.hs.dgsw.SOPO_server_v2.global.error.custom.board.BoardNotFound;
 import kr.hs.dgsw.SOPO_server_v2.global.error.custom.contest.ContestNotFound;
 import kr.hs.dgsw.SOPO_server_v2.global.response.ResponseData;
 import lombok.RequiredArgsConstructor;
-import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Consumer;
 import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
 public class FileService {
 
-    @Value("${cloud.aws.s3.bucket}")
-    private String bucket;
-
-    private final AmazonS3 amazonS3;
-
+    private final S3Service s3Service;
     private final FileRepository fileRepository;
-
     private final BoardRepository boardRepository;
-
     private final ContestRepository contestRepository;
 
     @Transactional
     public ResponseData<List<FileRes>> fileUpload(Long id, FileCategory fileCategory, List<MultipartFile> fileList) {
 
-        List<FileRes> fileLists = new ArrayList<>();
-
-        try {
-
-            for (MultipartFile file : fileList) {
-                String fileName = file.getOriginalFilename();
-
-                ObjectMetadata metadata = new ObjectMetadata();
-                metadata.setContentType(file.getContentType());
-                metadata.setContentLength(file.getSize());
-
-                // S3에 저장하는 코드
-                amazonS3.putObject(
-                        new PutObjectRequest(bucket, fileName, file.getInputStream(), metadata)
-                );
-
-                // FileRes 형식으로 만들기
-                FileRes oneFile = FileRes.builder()
-                        .fileName(fileName)
-                        .fileUrl(amazonS3.getUrl(bucket, fileName).toString())
-                        .build();
-
-                fileLists.add(oneFile);
-
-                // 파일 업데이트 하는 코드
-                if (fileCategory == FileCategory.BOARD) {
-
-                    BoardEntity board = boardRepository.findById(id)
-                            .orElseThrow(() -> BoardNotFound.EXCEPTION);
-
-                    // DB에 저장하는 코드
-                    FileEntity fileEntity = FileEntity.builder()
-                            .fileName(fileName)
-                            .fileCategory(fileCategory)
-                            .fileUrl(amazonS3.getUrl(bucket, fileName).toString())
-                            .board(board)
-                            .build();
-                    fileRepository.save(fileEntity);
-
-                    // 현재 게시물의 파일 목록에 새로 업로드된 파일 추가
-                    List<FileEntity> files = board.getFile();
-                    if (files == null) {
-                        files = new ArrayList<>();
-                    }
-                    files.add(fileEntity);
-                    board.setFile(files); // BoardEntity의 파일 목록 직접 수정
-
-                    // 게시물 엔티티를 DB에 저장하여 파일 목록 반영
-                    boardRepository.save(board);
-
-                } else if (fileCategory == FileCategory.CONTEST) {
-                    ContestEntity contest = contestRepository.findById(id)
-                            .orElseThrow(() -> ContestNotFound.EXCEPTION);
-
-                    // DB에 저장하는 코드
-                    FileEntity fileEntity = FileEntity.builder()
-                            .fileName(fileName)
-                            .fileCategory(fileCategory)
-                            .fileUrl(amazonS3.getUrl(bucket, fileName).toString())
-                            .contest(contest)
-                            .build();
-
-                    fileRepository.save(fileEntity);
-
-                    // 현재 게시물의 파일 목록에 새로 업로드된 파일 추가
-                    List<FileEntity> files = contest.getFile();
-                    if (files == null) {
-                        files = new ArrayList<>();
-                    }
-                    files.add(fileEntity);
-                    contest.setFile(files); // BoardEntity의 파일 목록 직접 수정
-
-                    // 게시물 엔티티를 DB에 저장하여 파일 목록 반영
-                    contestRepository.save(contest);
-                }
+        List<FileRes> fileRes = new ArrayList<>();
+        for (MultipartFile file : fileList) {
+            S3Res s3Res = s3Service.upload(file, fileCategory.toString());
+            FileEntity fileEntity = createFileEntity(file, s3Res.url(), fileCategory);
+
+            if (fileCategory == FileCategory.BOARD) {
+                BoardEntity board = boardRepository.findById(id)
+                        .orElseThrow(() -> BoardNotFound.EXCEPTION);
+                saveFileEntity(fileEntity, board.getFile(), board, boardRepository::save);
+            } else if (fileCategory == FileCategory.CONTEST) {
+                ContestEntity contest = contestRepository.findById(id)
+                        .orElseThrow(() -> ContestNotFound.EXCEPTION);
+                saveFileEntity(fileEntity, contest.getFile(), contest, contestRepository::save);
             }
-        } catch (IOException e) {
-            throw new RuntimeException("Error uploading file to S3", e);
+            fileRes.add(FileRes.of(fileEntity));
+        }
+
+        return ResponseData.of(HttpStatus.OK, "파일 업로드 완료", fileRes);
+    }
+
+    private FileEntity createFileEntity(MultipartFile file, String url, FileCategory fileCategory) {
+        return FileEntity.builder()
+                .fileName(file.getOriginalFilename())
+                .fileCategory(fileCategory)
+                .fileUrl(url)
+                .build();
+    }
+
+    private <T> void saveFileEntity(FileEntity fileEntity, List<FileEntity> files, T entity, Consumer<T> saveFunction) {
+        if (files == null) {
+            files = new ArrayList<>();
+        }
+        files.add(fileEntity);
+
+        if (entity instanceof BoardEntity) {
+            fileEntity.setBoard((BoardEntity) entity);
+            ((BoardEntity) entity).setFile(files);
+        } else if (entity instanceof ContestEntity) {
+            fileEntity.setContest((ContestEntity) entity);
+            ((ContestEntity) entity).setFile(files);
         }
-        return ResponseData.of(HttpStatus.OK, "파일 업로드 완료", fileLists);
+
+        fileRepository.save(fileEntity);
+        saveFunction.accept(entity);
     }
 
     public ResponseData<List<FileRes>> getFiles(Long id, FileCategory fileCategory) {
@@ -132,19 +88,13 @@ public ResponseData<List<FileRes>> getFiles(Long id, FileCategory fileCategory)
 
         if (fileCategory == FileCategory.BOARD) {
 
-            fileList = fileRepository.findByBoard_BoardId(id).stream()
-                    .map(file -> FileRes.builder()
-                            .fileName(file.getFileName())
-                            .fileUrl(file.getFileUrl())
-                            .build())
+            fileList = fileRepository.findByBoardBoardId(id).stream()
+                    .map(FileRes::of)
                     .collect(Collectors.toList());
 
         } else if (fileCategory == FileCategory.CONTEST) {
-            fileList = fileRepository.findByContest_ContestId(id).stream()
-                    .map(file -> FileRes.builder()
-                            .fileName(file.getFileName())
-                            .fileUrl(file.getFileUrl())
-                            .build())
+            fileList = fileRepository.findByContestContestId(id).stream()
+                    .map(FileRes::of)
                     .collect(Collectors.toList());
         }
 
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberController.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberController.java
index 76b80be..d53ce2e 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberController.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberController.java
@@ -23,4 +23,6 @@ public class MemberController {
     public Response deleteMember(){
         return memberService.deleteMember();
     }
+
+
 }
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberProfileController.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberProfileController.java
index a0f764c..7152615 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberProfileController.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/controller/MemberProfileController.java
@@ -19,7 +19,7 @@ public class MemberProfileController {
     private final MemberProfileService memberProfileService;
 
     @Operation(description = "멤버 프로필 수정")
-    @PatchMapping("")
+    @PatchMapping
     public Response modifyMember(
             @RequestBody MemberModifyReq memberModifyReq) {
         return memberProfileService.memberModify(memberModifyReq);
@@ -30,5 +30,7 @@ public Response modifyMember(
     public ResponseData<ReadProfileRes> readProfile(){
         return memberProfileService.readProfile();
     }
+
+
 }
 
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/dto/req/MemberModifyReq.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/dto/req/MemberModifyReq.java
index c507be7..ae029a2 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/dto/req/MemberModifyReq.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/presentation/dto/req/MemberModifyReq.java
@@ -7,6 +7,7 @@ public record MemberModifyReq(
         @Email
         String memberEmail,
         String authCode,
-        String memberPassword
+        String memberPassword,
+        String memberSchool
 ) {
 }
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/service/MemberProfileService.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/service/MemberProfileService.java
index 69186c8..811b411 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/service/MemberProfileService.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/member/service/MemberProfileService.java
@@ -1,6 +1,6 @@
 package kr.hs.dgsw.SOPO_server_v2.domain.member.service;
 
-import kr.hs.dgsw.SOPO_server_v2.domain.auth.service.AuthEmailService;
+import  kr.hs.dgsw.SOPO_server_v2.domain.auth.service.AuthEmailService;
 import kr.hs.dgsw.SOPO_server_v2.domain.member.entity.MemberEntity;
 import kr.hs.dgsw.SOPO_server_v2.domain.member.presentation.dto.req.MemberModifyReq;
 import kr.hs.dgsw.SOPO_server_v2.domain.member.presentation.dto.res.ReadProfileRes;
@@ -11,6 +11,7 @@
 import kr.hs.dgsw.SOPO_server_v2.global.response.Response;
 import kr.hs.dgsw.SOPO_server_v2.global.response.ResponseData;
 import lombok.RequiredArgsConstructor;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.http.HttpStatus;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.stereotype.Component;
@@ -30,8 +31,8 @@ public Response memberModify(MemberModifyReq memberModifyReq) {
         String memberEmail = memberModifyReq.memberEmail();
         String authCode = memberModifyReq.authCode();
 
-        if (memberEmail != null && !memberEmail.isEmpty()) {
-            if (authCode == null || authCode.isEmpty()) {
+        if (StringUtils.isNotBlank(memberEmail)) {
+            if (StringUtils.isBlank(authCode)) {
                 throw NeedAuthCode.EXCEPTION;
             }
             if (!authEmailService.verifiedCode(memberEmail, authCode)) {
@@ -41,15 +42,20 @@ public Response memberModify(MemberModifyReq memberModifyReq) {
         }
 
         String memberPassword = memberModifyReq.memberPassword();
-        if (memberPassword != null) {
+        if (StringUtils.isNotBlank(memberPassword)) {
             member.setMemberPassword(new BCryptPasswordEncoder().encode(memberPassword));
         }
 
         String memberName = memberModifyReq.memberName();
-        if (memberName != null) {
+        if (StringUtils.isNotBlank(memberName)) {
             member.setMemberName(memberName);
         }
 
+        String memberSchool = memberModifyReq.memberSchool();
+        if (StringUtils.isNotBlank(memberSchool)) {
+            member.setMemberSchool(memberSchool);
+        }
+
         memberRepository.save(member);
 
         return Response.of(HttpStatus.OK, "성공");
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/entity/PortfolioEntity.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/entity/PortfolioEntity.java
index 2427535..f2e23f2 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/entity/PortfolioEntity.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/entity/PortfolioEntity.java
@@ -26,7 +26,6 @@ public class PortfolioEntity extends BaseTimeEntity {
     @Column(name = "portfolio_id")
     private Long portfolioId;
 
-
     @Column(name = "portfolio_title")
     private String portfolioTitle;
 
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/presentation/controller/PortfolioController.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/presentation/controller/PortfolioController.java
index 896bfc2..31e9615 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/presentation/controller/PortfolioController.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/presentation/controller/PortfolioController.java
@@ -18,6 +18,12 @@
 public class PortfolioController {
     private final PortfolioService portfolioService;
 
+    public ResponseData<Long> generatePortfolio() {
+        return portfolioService.generatePortfolio();
+    }
+
+
+
     @Operation(description = "최신 포트폴리오 불러오기")
     @GetMapping
     public ResponseData<List<LoadPortfolioRes>> loadPortfolio(
@@ -25,4 +31,6 @@ public ResponseData<List<LoadPortfolioRes>> loadPortfolio(
             ){
         return portfolioService.pagingPortfolio(pageRequest);
     }
+
+
 }
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/presentation/dto/req/ModifyPortfolioReq.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/presentation/dto/req/ModifyPortfolioReq.java
new file mode 100644
index 0000000..1ddd905
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/presentation/dto/req/ModifyPortfolioReq.java
@@ -0,0 +1,10 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.portfolio.presentation.dto.req;
+
+import java.util.List;
+
+public record ModifyPortfolioReq(
+        String title,
+        String content,
+        List<String> tag
+) {
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/service/PortfolioService.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/service/PortfolioService.java
index 194550a..3a2966f 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/service/PortfolioService.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/portfolio/service/PortfolioService.java
@@ -2,9 +2,12 @@
 
 import kr.hs.dgsw.SOPO_server_v2.domain.portfolio.entity.PortfolioEntity;
 import kr.hs.dgsw.SOPO_server_v2.domain.portfolio.enums.PortfolioState;
+import kr.hs.dgsw.SOPO_server_v2.domain.portfolio.presentation.dto.req.ModifyPortfolioReq;
 import kr.hs.dgsw.SOPO_server_v2.domain.portfolio.presentation.dto.res.LoadPortfolioRes;
 import kr.hs.dgsw.SOPO_server_v2.domain.portfolio.repository.PortfolioRepository;
+import kr.hs.dgsw.SOPO_server_v2.global.infra.security.GetCurrentMember;
 import kr.hs.dgsw.SOPO_server_v2.global.page.PageRequest;
+import kr.hs.dgsw.SOPO_server_v2.global.response.Response;
 import kr.hs.dgsw.SOPO_server_v2.global.response.ResponseData;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.HttpStatus;
@@ -17,6 +20,25 @@
 @RequiredArgsConstructor
 public class PortfolioService {
     private final PortfolioRepository portfolioRepository;
+    private final GetCurrentMember getCurrentMember;
+
+    public ResponseData<Long> generatePortfolio(){
+        PortfolioEntity portfolioEntity = portfolioRepository.save(
+                PortfolioEntity.builder()
+                        .portfolioContent(null)
+                        .portfolioTitle(null)
+                        .portfolioState(PortfolioState.PENDING)
+                        .tagEntity(null)
+                        .member(getCurrentMember.current())
+                        .build());
+
+        return ResponseData.of(HttpStatus.OK, "포트폴리오 생성 성공", portfolioEntity.getPortfolioId());
+    }
+
+    public Response modifyPortfolio(ModifyPortfolioReq generatePortfolioReq){
+        return null;
+
+    }
 
     public ResponseData<List<LoadPortfolioRes>> pagingPortfolio(PageRequest pageRequest){
         List<PortfolioEntity> portfolioEntities = portfolioRepository.findPortfoliosByState(PortfolioState.ACTIVE);
@@ -29,4 +51,5 @@ public ResponseData<List<LoadPortfolioRes>> pagingPortfolio(PageRequest pageRequ
 
         return ResponseData.of(HttpStatus.OK, "성공", loadPortfolioReqList);
     }
+
 }
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/common/aws/S3Service.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/common/aws/S3Service.java
new file mode 100644
index 0000000..92bdcc6
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/common/aws/S3Service.java
@@ -0,0 +1,59 @@
+package kr.hs.dgsw.SOPO_server_v2.global.common.aws;
+
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.model.CannedAccessControlList;
+import com.amazonaws.services.s3.model.ObjectMetadata;
+import com.amazonaws.services.s3.model.PutObjectRequest;
+import kr.hs.dgsw.SOPO_server_v2.global.common.aws.dto.S3Res;
+import kr.hs.dgsw.SOPO_server_v2.global.config.S3Config;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+public class S3Service {
+
+    private final AmazonS3 amazonS3;
+    private final S3Config s3Config;
+
+    public S3Res upload(MultipartFile file, String dirName){
+        String originFileName = file.getOriginalFilename();
+
+        String uuid = UUID.randomUUID().toString();
+        assert originFileName != null;
+        String uniqueFileName = uuid + "_" + originFileName.replaceAll("\\s", "_");
+
+        String fileName = dirName + "/" + uniqueFileName;
+
+        ObjectMetadata objectMetadata = new ObjectMetadata();
+        objectMetadata.setContentLength(file.getSize());
+        objectMetadata.setContentType(file.getContentType());
+
+        try(InputStream inputStream = file.getInputStream()) {
+            amazonS3.putObject(new PutObjectRequest(s3Config.bucket, fileName, inputStream, objectMetadata)
+                    .withCannedAcl(CannedAccessControlList.PublicRead));
+        } catch(IOException e) {
+            throw new IllegalArgumentException(String.format("파일을 올리는데 실패했습니다. %s", fileName));
+        }
+        String url = amazonS3.getUrl(s3Config.bucket, fileName).toString();
+        return S3Res.of(url);
+    }
+
+    public void deleteFile(String fileName) {
+        String decodedFileName = URLDecoder.decode(fileName, StandardCharsets.UTF_8);
+        amazonS3.deleteObject(s3Config.bucket, decodedFileName);
+    }
+
+    public S3Res updateFile(MultipartFile newFile, String oldFileName, String dirName) throws IOException {
+        deleteFile(oldFileName);
+        return upload(newFile, dirName);
+    }
+
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/common/aws/dto/S3Res.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/common/aws/dto/S3Res.java
new file mode 100644
index 0000000..5ffc3d1
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/common/aws/dto/S3Res.java
@@ -0,0 +1,11 @@
+package kr.hs.dgsw.SOPO_server_v2.global.common.aws.dto;
+
+public record S3Res(
+        String url
+) {
+    public static S3Res of(String url) {
+        return new S3Res(
+                url
+        );
+    }
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/config/S3Config.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/config/S3Config.java
index dd45fde..ec933ca 100644
--- a/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/config/S3Config.java
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/config/S3Config.java
@@ -20,6 +20,9 @@ public class S3Config {
     @Value("${cloud.aws.region.static}")
     private String region;
 
+    @Value("${cloud.aws.s3.bucket}")
+    public String bucket;
+
     @Bean
     public AmazonS3 amazonS3Client() {
         BasicAWSCredentials awsCredentials = new BasicAWSCredentials(accessKey, secretKey);
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/response/ResponseException.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/response/ResponseException.java
new file mode 100644
index 0000000..7a25c8d
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/global/response/ResponseException.java
@@ -0,0 +1,4 @@
+package kr.hs.dgsw.SOPO_server_v2.global.response;
+
+public record ResponseException() {
+}