判断远程资源是否可访问

import java.NET.*;
import java.io.*;
public class test
{
    public static void main(String[] args){
        URL url = null;
        URLConnection urlCon;
        InputStream inStream;//你只需判断这个变量值 .
        try{
            url = new URL("http","www13.kaxiu.com",80,"modules/959908432/hua_cs.HTML");
            urlCon = url.openConnection();
            inStream = urlCon.getInputStream();
        }
        catch(MalformedURLException e){}
        catch(java.io.IOException e2){}
        String urlFileName = url.getFile();
    }
}