[Springboot + AWS S3] AWS S3 파일업로드 구현

1. pom.xml 파일에 추가합니다.

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk-s3</artifactId>
    <version>1.11.808</version>
</dependency>

 

2. AWS 자격 증명을 구성합니다.

import com.amazonaws.auth.AWSCredentials;
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 AWSConfig {

    @Value("${aws.access.key}")
    private String awsAccessKey;

    @Value("${aws.secret.key}")
    private String awsSecretKey;

    @Bean
    public AmazonS3 s3client() {
        AWSCredentials awsCredentials = new BasicAWSCredentials(awsAccessKey, awsSecretKey);
        return AmazonS3ClientBuilder.standard().withCredentials(new AWSStaticCredentialsProvider(awsCredentials)).build();
    }
}

 

3. S3에 파일 업로드

import com.amazonaws.services.s3.model.PutObjectRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;

@Service
public class S3Service {

    @Autowired
    private AmazonS3 s3client;

    public void uploadFileToS3(MultipartFile file, String bucketName, String fileName) throws IOException {
        File fileToUpload = convertMultiPartToFile(file);
        s3client.putObject(new PutObjectRequest(bucketName, fileName, fileToUpload));
    }

    private File convertMultiPartToFile(MultipartFile file) throws IOException {
        File convFile = new File(file.getOriginalFilename());
        file.transferTo(convFile);
        return convFile;
    }
}