kamranzafar / jddl

Java http direct download library

Overview

jddl (Java Direct Downloader) is a simple and lightweight java library, which makes it very easy and trivial to direct-download multiple files over HTTP and to track the download progress. Now supports SSL and basic authentication.

Note: Support for FTP downloads will be added in future releases

Usage

jddl is a multi-threaded API capable of parallel-downloading multiple files and uses a custom event handler to update the download status. Below is a basic example.

                                                                           

 // Create a DirectDownloader instance
 DirectDownloader dd = new DirectDownloader();

 String file = "http://someserver/somefile.zip"
 String out = "somefile.zip"

 // Add files to be downloaded
 dd.download( new DownloadTask( new URL( file ), new FileOutputStream( out ), new DownloadListener() {
   String fname;
 
   public void onUpdate(int bytes, int totalDownloaded) {
      // update progress bar etc.
   }

   public void onStart(String fname, int size) {
      this.fname = fname;
      System.out.println( "Downloading " + fname + " of size " + size );
   }

   public void onComplete() {
      System.out.println( fname + " downloaded" );
   }

   public void onCancel() {
      System.out.println( fname + " cancelled" );
   }
 } ) );

 // Start downloading
 Thread t = new Thread( dd );
 t.start();
 t.join();

Examples

Below are some comprehensive examples of using jddl.

• Console example
• Swing example
• Android example