Does the SDK Support Uploading, Downloading, or Copying Objects in a Batch? (Java SDK)

// Replace the following region with the one in use. CN-Hong Kong is used here as an example.
String endPoint = "https://obs.ap-southeast-1.myhuaweicloud.com";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY_ID.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
String ak = System.getenv("ACCESS_KEY_ID");
String sk = System.getenv("SECRET_ACCESS_KEY_ID");
final String bucketName = "bucketname";
// Define the prefix of objects in a bucket.
final String objectPre = "object/";
// Folder to be uploaded
final String localDirPath = "localDirPath";
final List<File> list = new ArrayList<>();
// Scan all objects in the folder.
static void listFiles(File file){
    File[] fs = file.listFiles();
    assert fs != null;
    if (fs.length < 1){
        // If an empty folder needs to be uploaded, add it to the list.
        list.add(file);
    }else{
        for (File f:fs){
            if (f.isDirectory()){
                listFiles(f);
            }
            if (f.isFile()){
                // Add objects to be uploaded to the list.
                list.add(f);
            }
        }
    }
}
// Traverse the folder to be uploaded and obtain all objects to be uploaded.
File file = new File(localDirPath);
listFiles(file);

// Create an instance of ObsClient.
final ObsClient obsClient = new ObsClient(ak, sk, endPoint);

// Initialize the thread pool.
ExecutorService executorService = Executors.newFixedThreadPool(20);

// Concurrently upload parts.
for (File f:list){
    executorService.execute(() -> {
        if (f.isDirectory()){
            // For empty folders, create empty folder objects in the bucket.
            String remoteObjectKey = objectPre + f.getPath().substring(localDirPath.length() + 1) + "/";
            obsClient.putObject(bucketName, remoteObjectKey, new ByteArrayInputStream(new byte[0]));
        }else{
            String remoteObjectKey = objectPre + f.getPath().substring(localDirPath.length() + 1);
            obsClient.putObject(bucketName, remoteObjectKey, new File(f.getPath()));
        }
    });
}

// Wait until the upload is complete.
executorService.shutdown();
while (!executorService.isTerminated())
{
    try
    {
        executorService.awaitTermination(5, TimeUnit.SECONDS);
    }
    catch (InterruptedException e)
    {
        e.printStackTrace();
    }
}
// Close ObsClient.
try {
    obsClient.close();
} catch (IOException e) {
    e.printStackTrace();
}