Java示例查找代理设置2

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();
      }
   }
}