使用JAVA代理服务器

import java.io.BufferedInputStream;
import java.net.Proxy;
import java.net.URL;
import java.net.URLConnection;

public class TestProxyIp {
 public static void main(String args[]) {
  System.getProperties().setProperty("proxySet", "true");
  

  System.getProperties().setProperty("http.proxyHost", "46.0.203.7 ");
  System.getProperties().setProperty("http.proxyPort", "8080");
  System.out.println(getHtml("http://www.ip138.com/ip2city.asp"));

 }

 private static String getHtml(String address) {
  StringBuffer html = new StringBuffer();
  String result = null;
  try {
   URL url = new URL(address);
   URLConnection conn = url.openConnection();
   conn
     .setRequestProperty(
       "User-Agent",
       "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; GTB5; .NET CLR 2.0.50727; CIBA)");

   BufferedInputStream in = new BufferedInputStream(conn
     .getInputStream());

   try {

    String inputLine;

    byte[] buf = new byte[4096];

    int bytesRead = 0;

    while (bytesRead >= 0) {

     inputLine = new String(buf, 0, bytesRead, "ISO-8859-1");
     html.append(inputLine);

     bytesRead = in.read(buf);

     inputLine = null;

    }

    buf = null;

   } finally {

    in.close();

    conn = null;

    url = null;

   }

   result = new String(html.toString().trim().getBytes("ISO-8859-1"),
     "gb2312").toLowerCase();

  } catch (Exception e) {

   e.printStackTrace();

   return null;

  }

  html = null;

  return result;

 }

}