[#82]: feat: 이미지 업로드 기능

BE/src/main/java/com/codesquad/issue/service/IssueService.java

@@ -8,12 +8,12 @@
 import com.codesquad.issue.domain.issue.Issue;
 import com.codesquad.issue.domain.issue.IssueLabel;
 import com.codesquad.issue.domain.issue.IssueLabelRepository;
+import com.codesquad.issue.domain.issue.IssueRepository;
+import com.codesquad.issue.domain.issue.request.IssueCreateRequest;
 import com.codesquad.issue.domain.issue.request.IssueModifyRequest;
 import com.codesquad.issue.domain.issue.response.IssueCreateResponse;
 import com.codesquad.issue.domain.issue.response.IssueDetailResponse;
-import com.codesquad.issue.domain.issue.IssueRepository;
 import com.codesquad.issue.domain.issue.response.IssueResponse;
-import com.codesquad.issue.domain.issue.request.IssueCreateRequest;
 import com.codesquad.issue.domain.label.Label;
 import com.codesquad.issue.domain.label.LabelRepository;
 import com.codesquad.issue.domain.label.response.LabelResponse;

BE/src/main/java/com/codesquad/issue/service/S3Service.java

@@ -0,0 +1,42 @@
+package com.codesquad.issue.service;
+
+import com.amazonaws.services.s3.AmazonS3Client;
+import com.amazonaws.services.s3.model.CannedAccessControlList;
+import com.amazonaws.services.s3.model.PutObjectRequest;
+import java.io.File;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+@RequiredArgsConstructor
+@Slf4j
+@Service
+public class S3Service {
+
+    private final AmazonS3Client amazonS3Client;
+
+    @Value("${cloud.aws.s3.bucket}")
+    private String bucket;
+
+    public String upload(File uploadFile, String dirName) {
+        String fileName = dirName + "/" + uploadFile.getName();
+        String uploadImageUrl = putS3(uploadFile, fileName);
+        removeNewFile(uploadFile);
+        return uploadImageUrl;
+    }
+
+    private String putS3(File uploadFile, String fileName) {
+        amazonS3Client.putObject(new PutObjectRequest(bucket, fileName, uploadFile).withCannedAcl(
+                CannedAccessControlList.PublicRead));
+        return amazonS3Client.getUrl(bucket, fileName).toString();
+    }
+
+    private void removeNewFile(File targetFile) {
+        if (targetFile.delete()) {
+            log.info("파일이 삭제되었습니다.");
+        } else {
+            log.info("파일이 삭제되지 못했습니다.");
+        }
+    }
+}