一个Java开发的在线视频下载工具，可以把视频分块下载到本地，再拼凑成完整版

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");
    System.setProperty("http.proxyPort", "8080");
    System.setProperty("https.proxyHost", "proxy");
    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();
  }
}