Range Download

//You can log in to the console of Object Storage Service with AccessKey and SecretKey to view it in [AccessKey Management].  
String accessKey =  "<yourAccessKeyId>";  
String secreteKey = "<yourSecretKey>";       
// Take cn-north-1 as an example for endpoint, and fill in according to actual situation for other regions  
String endPoint = "oss.cn-north-1.jcloudcs.com";  
String bucketName = "<yourBucketName>";  
String objectName = "<yourObjectName>";    
//The configuration of ClientConfig is currently by default. If the user needs some other configurations, he/she may configure them by himself/herself, such as setting the time of connection time-out.  
ClientConfig config = new ClientConfig();  
  
//Build JingdongStorageService instance  
Credential credential = new Credential(accessKey, secreteKey);  
JingdongStorageService jss = new JingdongStorageService(credential,config); 
//Configure endPoint  
jss.setEndpoint(endPoint);    
   
//Create objectService instance  
ObjectService objectService = jss.bucket(bucketName).object(objectName);  
//Obtain an object, return the data of the first 1000 bytes (including the 1000th), 1001 bytes data in total.  
StorageObject storageObject = objectService.range(0, 1000).get();  
//Obtain object, wherein the data returns without the first 1000 bytes and download the rest part to the local file " localFile"  
//StorageObject storageObject = objectService.range(1000).get();  
//Download the file to the local files, as the example below, the specified object is downloaded to the "localFile"  
storageObject.toFile(new File("<localFile>"));    
 
//A group of HTTP connection pool inside the JingdongStorageService object is under maintenance. Other destroy methods shall be called to close the connection pool before using the object,  
//Please note that once the destroy method is called, the object cannot be used again, otherwise an exception will be thrown.  
jss.destroy();

byte[ ] buf = new byte[1024];  
InputStream in = storageObject.getInputStream();  
for (int n = 0; n != -1; ) {  
    n = in.read(buf, 0, buf.length);  
}  
in.close();

byte[ ] buf = new byte[64 * 1024];  
InputStream in = storageObject.getInputStream();  
in.read(buf, 0, buf.length);  
in.close();