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A single bundled dependency that includes all service and dependent JARs with third-party libraries relocated to different namespaces.
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package com.qcloud.cos.demo;

import com.qcloud.cos.COSClient;
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.exception.CosClientException;
import com.qcloud.cos.exception.CosServiceException;
import com.qcloud.cos.http.HttpProtocol;
import com.qcloud.cos.model.*;
import com.qcloud.cos.region.Region;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;

public class SSECustomerDemo {
    public static void SSECustomerUpload() {
        // 初始化用户身份信息(secretId, secretKey)
        COSCredentials cred = new BasicCOSCredentials("COS_SECRETID", "COS_SECRETKEY");
        // 设置bucket的区域, COS地域的简称请参照 https://www.qcloud.com/document/product/436/6224
        ClientConfig clientConfig = new ClientConfig(new Region("ap-guangzhou"));
        // 要求http协议
        clientConfig.setHttpProtocol(HttpProtocol.https);
        // 生成cos客户端
        COSClient cosclient = new COSClient(cred, clientConfig);
        // bucket名需包含appid
        String bucketName = "examplebucket-1250000000";

        String key = "aaa/bbb.txt";
        File localFile = new File("test.txt");
        PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, key, localFile);
        SSECustomerKey sseCustomerKey = new SSECustomerKey("MDEyMzQ1Njc4OUFCQ0RFRjAxMjM0NTY3ODlBQkNERUY=");
        putObjectRequest.setSSECustomerKey(sseCustomerKey);
        // 设置存储类型, 默认是标准(Standard), 低频(standard_ia)
        putObjectRequest.setStorageClass(StorageClass.Standard_IA);
        try {
            PutObjectResult putObjectResult = cosclient.putObject(putObjectRequest);
            // putobjectResult会返回文件的etag, 该md5值根据s3语义不是对象的md5，只是唯一性标志
            String etag = putObjectResult.getETag();
        } catch (CosServiceException e) {
            e.printStackTrace();
        } catch (CosClientException e) {
            e.printStackTrace();
        }
        // 关闭客户端
        cosclient.shutdown();

    }
    public static void SSECustomerDownload() {
        // 1 初始化用户身份信息(secretId, secretKey)
        COSCredentials cred = new BasicCOSCredentials("COS_SECRETID", "COS_SECRETKEY");
        // 2 设置bucket的区域, COS地域的简称请参照 https://www.qcloud.com/document/product/436/6224
        ClientConfig clientConfig = new ClientConfig(new Region("ap-guangzhou"));
        clientConfig.setHttpProtocol(HttpProtocol.https);
        // 3 生成cos客户端
        COSClient cosclient = new COSClient(cred, clientConfig);
        // bucket名需包含appid
        String bucketName = "examplebucket-1250000000";

        String key = "aaa/bbb.txt";
        GetObjectRequest getObjectRequest = new GetObjectRequest(bucketName, key);
        SSECustomerKey sseCustomerKey = new SSECustomerKey("MDEyMzQ1Njc4OUFCQ0RFRjAxMjM0NTY3ODlBQkNERUY=");
        getObjectRequest.setSSECustomerKey(sseCustomerKey);
        try {
            COSObject cosObject = cosclient.getObject(getObjectRequest);
            COSObjectInputStream cosObjectInputStream = cosObject.getObjectContent();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(cosObjectInputStream));
            System.out.println(bufferedReader.readLine());
        } catch (CosServiceException e) {
            e.printStackTrace();
        } catch (CosClientException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 关闭客户端
        cosclient.shutdown();
    }

    static void SSECustomerHead() {
        // 1 初始化用户身份信息(secretId, secretKey)
        COSCredentials cred = new BasicCOSCredentials("COS_SECRETID", "COS_SECRETKEY");
        // 2 设置bucket的区域, COS地域的简称请参照 https://www.qcloud.com/document/product/436/6224
        ClientConfig clientConfig = new ClientConfig(new Region("ap-guangzhou"));
        clientConfig.setHttpProtocol(HttpProtocol.https);
        // 3 生成cos客户端
        COSClient cosclient = new COSClient(cred, clientConfig);
        // bucket名需包含appid
        String bucketName = "examplebucket-1250000000";

        String key = "aaa/bbb.txt";
        try {
            GetObjectMetadataRequest getObjectMetadataRequest = new GetObjectMetadataRequest(bucketName, key);
            SSECustomerKey sseCustomerKey = new SSECustomerKey("MDEyMzQ1Njc4OUFCQ0RFRjAxMjM0NTY3ODlBQkNERUY=");
            getObjectMetadataRequest.setSSECustomerKey(sseCustomerKey);
            ObjectMetadata objectMetadata = cosclient.getObjectMetadata(getObjectMetadataRequest);
            System.out.println(objectMetadata);
        } catch (CosServiceException e) {
            e.printStackTrace();
        } catch (CosClientException e) {
            e.printStackTrace();
        }
        // 关闭客户端
        cosclient.shutdown();
    }

    public static void main(String[] args) {
        SSECustomerUpload();
        SSECustomerDownload();
        SSECustomerHead();
    }
}