Java对象存储OSS（AWS S3）上传和下载文件_java aws s3 文件下载

package test;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.ClientConfiguration;
import com.amazonaws.Protocol;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.PutObjectResult;
import com.amazonaws.services.s3.model.S3Object;

import java.io.*;

public class OSSTest {
    public static void main(String[] args) throws Exception {
        //uploadFile();
       getFile();
    }
    //上传文件
    public static void uploadFile(){
        //读写账号
        String bucketName = "bucketName";
        String endpoint = "ip:端口";
        String key = "key";
        String secret = "secretKey";
        //创建Amazon S3对象使用明确凭证
        ClientConfiguration clientConfig = new ClientConfiguration();
        clientConfig.setProtocol(Protocol.HTTP);//访问协议
        BasicAWSCredentials awsCredentials = new BasicAWSCredentials(