Java示例查找系统的代理设置

import java.net.InetSocketAddress;

import java.net.Proxy;

import java.net.ProxySelector;

import java.net.URI;

import java.util.Iterator;

import java.util.List;



public class NewClass {

   public static void main(String[] args) {

      try {

         System.setProperty("java.net.useSystemProxies", "true");

         List<Proxy> l = ProxySelector.getDefault().select(

            new URI("http://www.google.com/"));



         for (Iterator<Proxy> iter = l.iterator(); iter.hasNext();) {

            Proxy proxy = iter.next();

            System.out.println("proxy hostname : " + proxy.type());

            InetSocketAddress addr = (InetSocketAddress) proxy.address();



            if (addr == null) {

               System.out.println("No Proxy");

            } else {

               System.out.println("proxy hostname : " + addr.getHostName());

               System.out.println("proxy port : " + addr.getPort());

            }

         }

      } catch (Exception e) {

         e.printStackTrace();

      }

   }

}