各位朋友，问个java读取google网页内容的有关问题，请进来看

import java.net.*;import java.io.*;public class testUrl{    public static void main(String[] args)    {        StringBuffer document = new StringBuffer();        try         {            URL url = new URL("http://scholar.google.com.hk/scholar?hl=zh-CN&q=Still+stratus+not+altocumulus%3A+further+evidence+against+the+date%2Fparty+hub+distinction&lr=&as_ylo=&as_vis=1");            URLConnection conn = url.openConnection();            conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");            BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));            String line = null;            while ((line = reader.readLine()) != null)            document.append(line + " ");            reader.close();        }        catch (MalformedURLException e)         {            e.printStackTrace();         }        catch (IOException e)        {            e.printStackTrace();         }        System.out.println(document.toString());    }}