对象存储 OSS只获取文件元信息

详细解答可以参考官方帮助文档

通过headObject方法可以只获文件元信息而不获取文件的实体。代码如下：

// 创建同步获取文件元信息请求
HeadObjectRequest head = new HeadObjectRequest("<bucketName>", "<objectKey>");
OSSAsyncTask task = oss.asyncHeadObject(head, new OSSCompletedCallback<HeadObjectRequest, HeadObjectResult>() {
    @Override
    public void onSuccess(HeadObjectRequest request, HeadObjectResult result) {
        Log.d("headObject", "object Size: " + result.getMetadata().getContentLength());
        Log.d("headObject", "object Content Type: " + result.getMetadata().getContentType());
    }
    @Override
    public void onFailure(HeadObjectRequest request, ClientException clientExcepion, ServiceException serviceException) {
        // 请求异常
        if (clientExcepion != null) {
            // 本地异常如网络异常等
            clientExcepion.printStackTrace();
        }
        if (serviceException != null) {
            // 服务异常
            Log.e("ErrorCode", serviceException.getErrorCode());
            Log.e("RequestId", serviceException.getRequestId());
            Log.e("HostId", serviceException.getHostId());
            Log.e("RawMessage", serviceException.getRawMessage());
        }
    }
});
// task.waitUntilFinished();