URLConnection设置超时机制提升应用性能与容错

import java.net.*;
import java.io.*;
 
public class URLReader {
    public static void main(String[] args)  {
   long a=System.currentTimeMillis();
   try{
	URL myurl = new URL("http://www.chinajavaworld.com");
	URLConnection myurlcon = myurl.openConnection();
	myurlcon.setConnectTimeout(1000);
	myurlcon.setReadTimeout(20000);
	BufferedReader in = new BufferedReader(
				new InputStreamReader(
						myurlcon.getInputStream(),"UTF-8"));
 
	String inputLine;
 
	while ((inputLine = in.readLine()) != null)
	    System.out.println(inputLine);
	in.close();
	System.out.println(System.currentTimeMillis()-a);
	} catch (MalformedURLException e) {
		e.printStackTrace();
	} catch (UnsupportedEncodingException e) {
		e.printStackTrace();
	} catch (IOException e) {
		e.printStackTrace();
	}
    }
}