IP 에 따라 주소 정보 가 져 오기

package com.lee;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;

import org.json.JSONException;
import org.json.JSONObject;
/**
 *   IP           
 */
public class IPSeeker {  
 public void getAddresses(String content, String encodingString)
   throws UnsupportedEncodingException {
  //    pconline   
  String urlStr = "http://ip.taobao.com/service/getIpInfo.php";
  // http://whois.pconline.com.cn  IP        
  String returnStr = this.getResult(urlStr, content, encodingString);
  if (returnStr != null) {
	 System.out.println(returnStr);
	 JSONObject json=null;
	try {
		json = new JSONObject(returnStr);
		System.out.println(json.optJSONObject("data").getString("country"));
		System.out.println(json.optJSONObject("data").getString("area"));
		System.out.println(json.optJSONObject("data").getString("region"));
		System.out.println(json.optJSONObject("data").getString("city"));
		System.out.println(json.optJSONObject("data").getString("county"));
		System.out.println(json.optJSONObject("data").getString("isp"));
	} catch (JSONException e){
		e.printStackTrace();
	} 
  }
 }
 /**
  * @param urlStr
  *                 
  * @param content
  *                     ：name=xxx&pwd=xxx
  * @param encoding
  *                    。 GBK,UTF-8 
  * @return
  */
 private String getResult(String urlStr, String content, String encoding) {
  URL url = null;
  HttpURLConnection connection = null;
  try {
   url = new URL(urlStr);
   connection = (HttpURLConnection) url.openConnection();//       
   connection.setConnectTimeout(2000);//         ，    
   connection.setReadTimeout(2000);//           ，    
   connection.setDoOutput(true);//         true|false
   connection.setDoInput(true);//        true|false
   connection.setRequestMethod("POST");//     POST|GET
   connection.setUseCaches(false);//     true|false
   connection.connect();//       
   DataOutputStream out = new DataOutputStream(connection.getOutputStream());//               
   out.writeBytes(content);//    ,          name=xxx&pwd=xxx
   out.flush();//   
   out.close();//      
   BufferedReader reader = new BufferedReader(new InputStreamReader(
     connection.getInputStream(), encoding));//                 
   // , BufferedReader    
   StringBuffer buffer = new StringBuffer();
   String line = "";
   while ((line = reader.readLine()) != null) {
	   buffer.append(line);
   }
   	reader.close();
   return buffer.toString();
  } catch (IOException e) {
	  e.printStackTrace();
  } finally {
   if(connection != null) {
	   connection.disconnect();//     
   }
  }
  return null;
 }

 //   
 public static void main(String[] args) throws UnsupportedEncodingException {
  IPSeeker seeker = new IPSeeker();
  //  ip 219.136.134.157   =  =   =   =   =  
  String ip = "219.136.134.157";
  try {
	  seeker.getAddresses("ip="+ip, "GBK");
  }catch (UnsupportedEncodingException e) {
    e.printStackTrace();
  }
 }
}