feat: Add S3Service

src/main/java/kr/markdown/alreadyme/service/S3Service.java

@@ -0,0 +1,32 @@
+package kr.markdown.alreadyme.service;
+
+import com.amazonaws.services.s3.AmazonS3Client;
+import com.amazonaws.services.s3.model.CannedAccessControlList;
+import com.amazonaws.services.s3.model.PutObjectRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+import java.io.File;
+
+@Service
+@RequiredArgsConstructor
+public class S3Service {
+    private final AmazonS3Client amazonS3Client;
+
+    @Value("${cloud.aws.s3.bucket}")
+    private String bucket;
+
+    public String upload(File file, String dirName) {
+        String filePath = dirName + "/" + file.getName();
+        return putS3(file, filePath);
+    }
+
+    private String putS3(File file, String filePath) {
+        amazonS3Client.putObject(
+                new PutObjectRequest(bucket, filePath, file)
+                        .withCannedAcl(CannedAccessControlList.PublicRead)
+        );
+        return amazonS3Client.getUrl(bucket, filePath).toString();
+    }
+}