列举指定个数的文件

列举存储桶内指定个数的文件(Object)，默认列举1000个文件，最多列举1000个文件。代码中需要引用"inspurcloud/oss/OssClient.h"类库，使用InspurCloud::OSS命名空间，并初始化账号信息AccessKeyId、AccessKeySecret、Endpoint，示例代码：

        //指定需要列举文件的存储桶
        std::string BucketName = "yourBucketName";

        //初始化资源
        InitializeSdk();
        ClientConfiguration conf;
        OssClient client(Endpoint, AccessKeyId, AccessKeySecret, conf) ;

        //列举文件
        ListObjectsRequest request(BucketName);
        request.setMaxKeys(200); //设置列举个数，最大为1000
        auto outcome = client.ListObjects(request);

        //处理结果
        if (outcome.isSuccess()) { 
            for (const auto& object : outcome.result().ObjectSummarys()) {
                std::cout << "object name：" << object.Key() <<",size:" << object.Size() <<
                ",lastmodify time:" << object.LastModified() << std::endl;
            }   
        }
        //异常处理
        else {
            std::cout << "ListObjects fail" << std::endl;
            std::cout << "error code:" << outcome.error().Code() << std::endl;
            std::cout << "error message:" << outcome.error().Message() << std::endl;
            std::cout << "requestId:" << outcome.error().RequestId() << std::endl;
            ShutdownSdk();
            return -1;
        }

        //释放资源
        ShutdownSdk();