启用元数据加速的存储桶操作

COSClient createCOSClient() {
    // 设置用户身份信息。
    // SECRETID 和 SECRETKEY 请登录访问管理控制台 https://console.cloud.tencent.com/cam/capi 进行查看和管理
    // 1 传入获取到的密钥 (secretId, secretKey, sessionToken)
    String secretId = "SECRETID";
    String secretKey = "SECRETKEY";
    COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);

    // ClientConfig 中包含了后续请求 COS 的客户端设置：
    ClientConfig clientConfig = new ClientConfig();

    // 设置 bucket 的地域
    // COS_REGION 请参照 https://cloud.tencent.com/document/product/436/6224
    clientConfig.setRegion(new Region("COS_REGION"));

    // 设置请求协议, http 或者 https
    // 5.6.53 及更低的版本，建议设置使用 https 协议
    // 5.6.54 及更高版本，默认使用了 https
    clientConfig.setHttpProtocol(HttpProtocol.https);

    // 以下的设置，是可选的：

    // 设置 socket 读取超时，默认 30s
    clientConfig.setSocketTimeout(30 * 1000);
    // 设置建立连接超时，默认 30s
    clientConfig.setConnectionTimeout(30 * 1000);

    // 如果需要的话，设置 http 代理，ip 以及 port
    clientConfig.setHttpProxyIp("httpProxyIp");
    clientConfig.setHttpProxyPort(80);

    // 生成 cos 客户端。
    return new COSClient(cred, clientConfig);
}

String bucketName = "examplebucket-1250000000";
// 创建客户端
COSClient cosClient = createCOSClient();
HeadBucketRequest headBucketRequest = new HeadBucketRequest(bucketName);
HeadBucketResult headBucketResult = cosClient.headBucket(headBucketRequest);
bool isMetaAccBucket = headBucketResult.isMetaAccBucket(); // 如果已经开启元数据加速能力，isMetaAccBucket 为 true

String bucketName = "examplebucket-1250000000";
String key = "test";
// 创建客户端
COSClient cosClient = createCOSClient();
GetObjectMetadataRequest getObjectMetadataRequest = new GetObjectMetadataRequest(bucketName, key);
ObjectMetadata objectMetadata = cosClient.getObjectMetadata(getObjectMetadataRequest);
boolean isDir = objectMetadata.isFileModeDir();  // 如果是目录，isDir 为 true

String bucketName = "examplebucket-1250000000";
String key = "test";
// 创建客户端
COSClient cosClient = createCOSClient();
DeleteObjectRequest deleteObjectRequest = new DeleteObjectRequest(bucket, key);
deleteObjectRequest.setRecursive(true); //递归删除目录
cosClient.deleteObject(deleteObjectRequest);

String bucketName = "examplebucket-1250000000";
String srcKey = "/test/src";
String dstKey = "test/dst"
// 创建客户端
COSClient cosClient = createCOSClient();
RenameRequest renameRequest = new RenameRequest(bucketName, srcKey, dstKey);
cosClient.rename(renameRequest);

// putObject 有中间路径
String bucketName = "examplebucket-1250000000";
// 对象键(Key)是对象在存储桶中的唯一标识。
String key = "/testdemo/test/README.md";

COSClient cosClient = createCOSClient();

// 本地文件
String localFilePath = "README.md";
File localFile = new File(localFilePath);
PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, key, file);
PutObjectResult putObjectResult = cosClient.putObject(bucketName, key, file);

// 区分中间路径是文件还是目录
// 中间路径
dirKey = "/testdemo/test";
GetObjectMetadataRequest getObjectMetadataRequest = new GetObjectMetadataRequest(bucketName, dirKey);
ObjectMetadata objectMetadata = cosClient.getObjectMetadata(getObjectMetadataRequest);  // 普通 bucket 在这里会返回 404
boolean isDir = objectMetadata.isFileModeDir();   // isDir 为 true