java上传图片(AmazonS3)_aws s3上传图片 java】

1.导入架包

<dependency>
	<groupId>com.amazonaws</groupId>
	<artifactId>aws-java-sdk-s3</artifactId>
	<version>1.11.347</version>
</dependency>
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2.创建工具类

import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.*;
import org.springframework.web.multipart.MultipartFile;

import java.text.SimpleDateFormat;
import java.util.Date;

public class S3Utils {
    //密匙
    static final String ACCESS_KEY ="";

    static final String SECRET_KEY = "";
    //储存桶的名称
    static final String BUCKET_NAME = "";
    //所属地区
    //储存路径,不同太在意我的，填你自己想要储存的路径
    static final String PATH="scrm";

    static final BasicAWSCredentials awsCreds = new BasicAWSCredentials(ACCESS_KEY, SECRET_KEY);

    static final AmazonS3 s3 = AmazonS3ClientBuilder.standard()
            .withCredentials(new AWSStaticCredentialsProvider(awsCreds))
            //设置服务器所属地区
            .withRegion(Regions.CN_NORTH_1)
            .build();

    /**
     * 上传到文件返回一个文件储存后的路径
     * @param multipartFile
     * @return
     * @throws Exception
     */
    public static String uploadFile(MultipartFile multipartFile,String bizPath)  {
        if (multipartFile.isEmpty()) {
            return "文件为空";
        }
        Date date = new Date();
        SimpleDateFormat formatter_yyyy = new SimpleDateFormat("yyyy");
        SimpleDateFormat formatter_MM = new SimpleDateFormat("MM");
        //在随机名前加上年月
        String s3FilePath =bizPath + "/" +formatter_yyyy.format(date) + "/" + formatter_MM.format(date) + "/" + multipartFile.getOriginalFilename();
        ObjectMetadata metadata  = new ObjectMetadata();
        metadata.setContentType(multipartFile.getContentType());
        metadata.setContentLength(multipartFile.getSize());
        try {
            //开始上传文件
            //1.不支持公网访问
            //s3.putObject(BUCKET_NAME, s3FilePath, multipartFile.getInputStream(), metadata)
            //2.支付公网访问
            PutObjectResult putObjectResult=s3.putObject(new PutObjectRequest(BUCKET_NAME, s3FilePath, multipartFile.getInputStream(), metadata)
                    .withCannedAcl(CannedAccessControlList.PublicRead));

            putObjectResult.getContentMd5();
            System.err.println("上传完成__文件位置为" + putObjectResult);
        } catch (Exception e) {
            e.printStackTrace();
        }
        //返回文件位置
        return "https://houyu-s3.s3.cn-north-1.amazonaws.com.cn/"+s3FilePath;
    }

    /**
     * 用过文件路径获取文件下载地址
     * @param path
     * @return
     */
    public static String downloadFile(String path){
        try {
            GeneratePresignedUrlRequest httpRequest = new GeneratePresignedUrlRequest(BUCKET_NAME, path);
            return s3.generatePresignedUrl(httpRequest).toString()+path;
        }catch (Exception e){
            e.printStackTrace();
        }
        return "获取失败";
    }

}
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