Java Download Picture __java

package cn.cctv.net;   import java.io.bytearrayoutputstream;   import  java.io.file;   import java.io.fileoutputstream;   import java.io.inputstream;    import java.net.httpurlconnection;   import java.net.url;   Public  class ImageRequest {       /**        *  @param  args       */       public  static void main (String[] args)  throws Exception {            //new a URL object             Url url = new url ("http://img.hexun.com/2011-06-21/130726386.jpg");            //Open Links             Httpurlconnection conn =  (HttpURLConnection) url.openconnection ();            //sets the request mode to "get"            conn.setrequestmethod ("get");            //Timeout Response time is 5 seconds             conn.setconnecttimeout (5 * 1000);            //get Picture data            InputStream  via input stream Instream = conn.getinputstream ();           // Obtains the binary data of the picture, obtains the data with the binary encapsulation, has the universality            byte[] data =  readinputstream (instream);           //new A file object to save the picture, Default save current Project root directory            file imagefile = new  file ("BeauTygirl.jpg ");           //Create output stream             fileoutputstream outstream = new fileoutputstream (ImageFile) ;           //Write Data             outstream.write (data);           //close output stream            outstream.close ();        }       public static byte[] readinputstream (InputStream  instream)  throws Exception{            Bytearrayoutputstream outstream = new bytearrayoutputstream ();            //Create a buffer string             byte[] buffer = new byte[1024];           //The length of the string per read, if-1 , representing all read finished            int len = 0;           //uses an input stream to read data from the buffer             while (  len=instream.read (buffer)  != -1 ) {                //writes data to buffer with an output stream, where the middle parameter represents the beginning of the read, and Len represents the length of the read.                outstream.write (Buffer,  0, len);           }            //Close input stream             Instream.close ();           //writes the data in OutStream to memory        &Nbsp;   return outstream.tobytearray ();       }  }