java下载程序

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;


public class DownLoad {

private URL url=null;
private URLConnection connection=null;
public DownLoad()
{
  
}
public static void main(String[] args) throws IOException
{
   DownLoad load=new DownLoad();
   load.download("http://www.kmabc.com/satan/qhc.mp3","青花瓷.mp3",1024);
   load.close();
}
private void close()
{
  
}
/**
* 
* @param string 下载地址

* @param buffer 缓冲区大小
* @param string2 保存地址
* @throws IOException
*/
private void download(String string, String string2,int buffer) throws IOException
{
            this.url=new URL(string);
            this.connection=url.openConnection();
           BufferedInputStream in=new BufferedInputStream(this.connection.getInputStream());
            FileOutputStream out=new FileOutputStream(string2);
            byte[] bs=new byte[buffer];
           int n=0;
           int i=0;
            while((n=in.read(bs))!=-1)
          {
             out.write(bs,0,n);
             i++;
             System.out.println("下载中..."+i);
           }
          out.flush();
          out.close();
           in.close();
}

}

 

 

评论

1 楼 jqallen 2010-09-17  

不支持其他协议，做下载最好支持多线程、thunder、flashget、qqdl、http等多种协议，而且对于redirect也需要处理，这样才具有普适性。