feat: s3 설정 추가 (#16)

* chore: timezone seoul 설정

* chore: 깃 템플릿 추가, readme.md 추가

* chore: 예외처리, 전역 환경 설정 외

* feat: 데이터 모델링

* chore: 🐳 cicd 설정

* chore: 🐳 workflow lowercase 로 수정

* chore: 디스코드 webhook 테스트

* chore: :global: cors 설정

* chore: 🐳 cors 변경사항 yml 재적용

* feat: ✨ 팀(방) 생성 기능 구현 (#9)

* feat: 목표 점검(캘린더) 기능 구현 (#11)

* feat: ✨ 초대코드 이메일 전송 기능 구현 (#13)

* feat: s3 설정 추가 (#15)

src/main/java/com/goormdari/global/config/s3/AmazonS3Config.java

@@ -0,0 +1,28 @@
+package com.goormdari.global.config.s3;
+
+import com.amazonaws.auth.AWSStaticCredentialsProvider;
+import com.amazonaws.auth.BasicAWSCredentials;
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.AmazonS3ClientBuilder;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class AmazonS3Config {
+
+    @Value("${cloud.aws.credentials.access-key}")
+    private String accessKey;
+    @Value("${cloud.aws.credentials.secret-key}")
+    private String secretKey;
+    @Value("${cloud.aws.region.static}")
+    private String region;
+    @Bean
+    public AmazonS3 amazonS3() {
+        BasicAWSCredentials awsCredentials = new BasicAWSCredentials(accessKey, secretKey);
+        return AmazonS3ClientBuilder.standard()
+                .withRegion(region)
+                .withCredentials(new AWSStaticCredentialsProvider(awsCredentials))
+                .build();
+    }
+}

src/main/java/com/goormdari/global/config/s3/S3Service.java

@@ -0,0 +1,43 @@
+package com.goormdari.global.config.s3;
+
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.model.ObjectMetadata;
+import com.amazonaws.services.s3.model.PutObjectRequest;
+import com.amazonaws.services.s3.model.PutObjectResult;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.util.UUID;
+
+@RequiredArgsConstructor
+@Service
+public class S3Service {
+    private final AmazonS3 amazonS3;
+    @Value("${cloud.aws.s3.bucket}")
+    private String bucket;
+
+    private String changedImageName(String originName) { //이미지 이름 중복 방지를 위해 랜덤으로 생성
+        String random = UUID.randomUUID().toString();
+        return random + originName;
+    }
+
+    public String uploadImageToS3(MultipartFile image) { //이미지를 S3에 업로드하고 이미지의 url을 반환
+        String originName = image.getOriginalFilename(); //원본 이미지 이름
+        String ext = originName.substring(originName.lastIndexOf(".")); //확장자
+        String changedName = changedImageName(originName); //새로 생성된 이미지 이름
+        ObjectMetadata metadata = new ObjectMetadata(); //메타데이터
+        metadata.setContentLength(image.getSize()); // 파일의 크기 설정
+        metadata.setContentType("image/" + ext);
+        try {
+            PutObjectResult putObjectResult = amazonS3.putObject(new PutObjectRequest(
+                    bucket, changedName, image.getInputStream(), metadata
+            ));
+        } catch (IOException e) {
+            throw new RuntimeException("ImageUploadException"); //커스텀 예외 던짐.
+        }
+        return amazonS3.getUrl(bucket, changedName).toString(); //데이터베이스에 저장할 이미지가 저장된 주소
+    }
+}