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();
}
}