一個Java開發的在線視頻下載工具，可以把視頻分塊下載到本地，再拼湊成完整版

package flick;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class DownloadLauncher {

	static final public int LAST = 109;
	static final public int START = 1;
	static final public String PREFIX = "https://cfvod.kaltura.com/scf/hls/p/1921661/sp/192166100/serveFlavor/entryId/1_e4vktn7o/v/1/ev/7/flavorId/1_51i2iaqb/name/a.mp4/seg-";


	static final public String POSTFIX1 = "-v1-a1.ts?Policy=eyJTdGF0ZW1lbnQiOlt7IlJlc291cmNlIjoiaHR0cHM6Ly9jZnZvZC5rYWx0dXJhLmNvbS9zY2YvaGxzL3AvMTkyMTY2MS9zcC8xOTIxNjYxMDAvc2VydmVGbGF2b3IvZW50cnlJZC8xX2U0dmt0bjdvL3YvMS9ldi83L2ZsYXZvcklkLzFfNTFpMmlhcWIvbmFtZS9hLm1wNC8qIiwiQ29uZGl0aW9uIjp7IkRhdGVMZXNzVGhhbiI6eyJBV1M6RXBvY2hUaW1lIjoxNTQ0NTExMjI4fX19XX0_&Signature=ZvSmUm7fUqvB7mX2XyrsMozNlRDL7O0QDkKTG5te-NDPNPvc1y7m~q20lAFYk2t0UzCOHSdpF5Jms3B65QPXG2uOF94eBQ8QnNAsUcCDyeFScwLo2b1WNXPnjn18cSZYXH2sBf9TiCu8TrMTWlf6SYGnhtWxQQfzdjbyVWhC9Lpt0uDL8gE~xpxNRUADRIJL7wQru4eBPWbqUFNkP6nNeTTkfcH~y-cYR1kZW8IaYoh1JRLTnZUrMjQMbyC6zi4MExo-SmAErLBXrjmjgMJ1fK4f9yRzIqlXnwIfg60jPDP-pBCvIGtVV22F0SLisaBrfHRCjSuOnZ0r0NvtcYJLZQ__&Key-Pair-Id=APKAJT6QIWSKVYK3V34A";
	static final public String POSTFIX = ".ts";
	static final public String LOCALPATH = "c:\\temp\\";
	static final public String MERGED = "merged.avi";
	
	public static void main(String[] args) {
		ExecutorService executor = Executors.newFixedThreadPool(1);
		
		for( int i = START; i <= LAST; i++ ){
			// String task = PREFIX + i + POSTFIX;
			String task = PREFIX + i + POSTFIX1;
			VideoFragmentDownloader load = new VideoFragmentDownloader(task, i);
		    executor.execute(load);
		}

		executor.shutdown();
		while (!executor.isTerminated()) {
        }

	}

}

package flick;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class Merger {

	private static final int START = 1;
	private static void run() throws IOException{
		
		FileInputStream in = null;
		String destFile = DownloadLauncher.LOCALPATH + 
				DownloadLauncher.MERGED;
		
		FileOutputStream out = new FileOutputStream(destFile,true);
		
		for( int i = START; i <= DownloadLauncher.LAST; i++){
			byte[] buf = new byte[1024];
			int len = 0;
			String sourceFile = DownloadLauncher.LOCALPATH + i + 
					DownloadLauncher.POSTFIX;
			
			in = new FileInputStream(sourceFile);
	
			while( (len = in.read(buf)) != -1 ){
				out.write(buf,0,len);
			}
		}
		out.close();
	}
	
	public static void main(String[] args) {
		try {
			run();
		} catch (IOException e) {
			e.printStackTrace();
		}
		System.out.println("Merged ok!");
	}

}
package flick;

import java.util.ArrayList;
import java.util.List;


public class TEST
{
	public static void main(String[] args)
	{
		Utility.SetProxy();
		ArrayList<String> a = null;
		List<String> urlList = Utility.getURLList("c:\\temp\\url.txt");
		for(int i = 0; i < urlList.size(); i++)
			System.out.println("Index: " + i + "-" + URLFetcher.getStaticURL(urlList.get(i)));
	}
}

package flick;



import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

public class URLFetcher 
{
	static public String getStaticURL(String ID)
	{
		String strFullURL = "http://api.flickr.com/services/rest/?method=flickr.photos.getSizes&api_key=b29c2c7f2a7cf6deccdd2672a7893025&photo_id="
				+ ID + "&format=rest";
		URL url;
		StringBuffer sb = new StringBuffer();
		try 
		{
			url = new URL(strFullURL);
			URLConnection urlConnection;
			urlConnection = url.openConnection(); 
			urlConnection.setRequestProperty("Accept-Charset", "UTF-8"); 
			InputStream is = urlConnection.getInputStream();
			BufferedReader in = new BufferedReader(new InputStreamReader(is, "UTF-8"));
			int numCharsRead;
			char[] charArray = new char[1024];
			while ((numCharsRead = in.read(charArray)) > 0) 
			{
				sb.append(charArray, 0, numCharsRead);
			}
			in.close();
		}
		catch (MalformedURLException e) 
		{
			e.printStackTrace();
		}
		catch (IOException e) 
		{
			e.printStackTrace();
		}
		return Utility.getStaticURL(sb.toString());
	}
}
package flick;


import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;


public class Utility
{
	static public void SetProxy()
	{
		System.setProperty("http.proxyHost", "proxy.wdf.sap.corp");
		System.setProperty("http.proxyPort", "8080");
		System.setProperty("https.proxyHost", "proxy.wdf.sap.corp");
		System.setProperty("https.proxyPort", "8080");
	}
	
	static public List<String> getURLList(String file)
	{
		List<String> urlList = new ArrayList<String>();
		try 
		{
			FileInputStream f = new FileInputStream(file);
			BufferedReader dr = new BufferedReader(new InputStreamReader(f));   
			String url = null;
		    while ( ( url = dr.readLine() ) != null )
		    {
		    	urlList.add(getID(url));
		    }
		    f.close();
		    dr.close();
		} 
		catch (IOException e) 
		{
		}
		return urlList;
	}
	
	static private String getID(String url)
	{
		String[] a = url.split("/");
		return a[a.length-1];
	}
	
	static public String getStaticURL(String content)
	{
		String prefix = "source=";
		int index = content.indexOf("Original");
		if( index == -1)
			return null;
		String sub = content.substring(index);
		int source = sub.indexOf(prefix);
		if( source == -1)
			return null;
		int end = sub.indexOf("url=");
		if( end == -1)
			return null;
		return sub.substring(source + prefix.length(), end);
	}
}

package flick;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

public class VideoFragmentDownloader  implements Runnable{
	private String mTask;
	private int mIndex;
	
	public  VideoFragmentDownloader(String url, int index){
		this.mTask = url;
		this.mIndex = index;
	}
	
	private void download(){
		URL task = null;
		String path = DownloadLauncher.LOCALPATH + this.mIndex + 
				DownloadLauncher.POSTFIX;
		String url = this.mTask;
		try {
			task = new URL(url);
			DataInputStream dataInputStream = new DataInputStream(task.openStream());
			 
            FileOutputStream fileOutputStream = new FileOutputStream(new File(path));
            ByteArrayOutputStream output = new ByteArrayOutputStream();
 
            byte[] buffer = new byte[1024];
            int length;
 
            while ((length = dataInputStream.read(buffer)) > 0) {
                output.write(buffer, 0, length);
            }
            fileOutputStream.write(output.toByteArray());
            dataInputStream.close();
            fileOutputStream.close();
            System.out.println("File: " + this.mIndex + " downloaded ok");
		}
		catch (MalformedURLException e) {
			e.printStackTrace();
		}
		catch (IOException e) {
			e.printStackTrace();
		}
		
	}

	@Override
	public void run() {
		this.download();
	}

}