实现访问一个网站并将指定的一个页面保存到本地

import java.io.*;import java.net.URL;import java.net.URLConnection;public class URLReader{    public static void main(String args[]) throws Exception    {        URL url = new URL("http://www.zstu.edu.cn");        File infile=new File("file1.html");        URLConnection web=url.openConnection();        BufferedReader in = new BufferedReader(new InputStreamReader(web.getInputStream()));        FileWriter f = new FileWriter(infile);        BufferedWriter bw = new BufferedWriter(f);        String lineString;        while((lineString=in.readLine())!=null)        {            f.write(lineString);        }        bw.close();        in.close();    }}