java工具类，来解析公网ip所属的地区和各种信息

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;
	/**
	 *  根据IP地址获取详细的地域信息
	 *  @project:personGocheck
	 *  @class:AddressUtils.java
	 *  @author:heguanhua E-mail:37809893@qq.com
	 *  @date：Nov 14, 2012 6:38:25 PM
	 */
	public class AddressUtils { 
		
		  /**
		  * @param content 请求的参数 格式为：name=xxx&pwd=xxx
		  * @param encoding 服务器端请求编码。如GBK,UTF-8等
		  * @return
		  * @throws UnsupportedEncodingException
		  */
		 public static String getAddresses(String content, String encodingString) throws UnsupportedEncodingException {
		  // 这里调用某宝pconline的接口（别骂我噢）
		  String urlStr = "http://ip.taobao.com/service/getIpInfo.php";
		  // 从http://whois.pconline.com.cn取得IP所在的省市区信息
		  String returnStr = getResult(urlStr, content, encodingString);
		  if (returnStr != null) {
				   // 处理返回的省市区信息
				  // System.out.println(returnStr);
				   String[] temp = returnStr.split(",");
				   if(temp.length<3){
				    return "0";//无效IP，局域网测试
				   }
				   String region = (temp[5].split(":"))[1].replaceAll("\"", "");
				   region = decodeUnicode(region);// 省份
				  // System.out.println(region);
				   /*String region1 = (temp[7].split(":"))[1].replaceAll("\"", "");
				   region1 = decodeUnicode(region1);// 市份
				   System.out.println(region1);*/
				   
				   /**
				    * String country = ""; String area = ""; String region = ""; String
				    * city = ""; String county = ""; String isp = ""; for(int i=0;i<temp.length;i++){
				    * switch(i){ case 1:country =
				    * (temp[i].split(":"))[2].replaceAll("\"", ""); country =
				    * decodeUnicode(country);//国家 break; case 3:area =
				    * (temp[i].split(":"))[1].replaceAll("\"", ""); area =
				    * decodeUnicode(area);//地区 break; case 5:region =
				    * (temp[i].split(":"))[1].replaceAll("\"", ""); region =
				    * decodeUnicode(region);//省份 break; case 7:city =
				    * (temp[i].split(":"))[1].replaceAll("\"", ""); city =
				    * decodeUnicode(city);//市区 break; case 9:county =
				    * (temp[i].split(":"))[1].replaceAll("\"", ""); county =
				    * decodeUnicode(county);//地区 break; case 11:isp =
				    * (temp[i].split(":"))[1].replaceAll("\"", ""); isp =
				    * decodeUnicode(isp);//ISP公司 break; } }
				    */
				  //  System.out.println(country+"="+area+"="+region+"="+city+"="+county+"="+isp);
				   //System.out.println(region);
				   return region;
		  }
		  return null;
		 }
		 
		
		 /** 
		  * @param urlStr 请求的地址
		  * @param content 请求的参数 格式为：name=xxx&pwd=xxx
		  * @param encoding 服务器端请求编码。如GBK,UTF-8等
		  * @return
		  */
		 private static String getResult(String urlStr, String content, String encoding) {
				  URL url = null;
				  HttpURLConnection connection = null;
				  try {
					   url = new URL(urlStr);
					   connection = (HttpURLConnection) url.openConnection();// 新建连接实例
					   connection.setConnectTimeout(2000);// 设置连接超时时间，单位毫秒
					   connection.setReadTimeout(2000);// 设置读取数据超时时间，单位毫秒
					   connection.setDoOutput(true);// 是否打开输出流 true|false
					   connection.setDoInput(true);// 是否打开输入流true|false
					   connection.setRequestMethod("POST");// 提交方法POST|GET
					   connection.setUseCaches(false);// 是否缓存true|false
					   connection.connect();// 打开连接端口
					   DataOutputStream out = new DataOutputStream(connection.getOutputStream());// 打开输出流往对端服务器写数据
					   out.writeBytes(content);// 写数据,也就是提交你的表单 name=xxx&pwd=xxx
					   out.flush();// 刷新
					   out.close();// 关闭输出流
					   BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), encoding));// 往对端写完数据对端服务器返回数据 ,以BufferedReader流来读取
					   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();// 关闭连接
					   }
				  }
				  return null;
		 }
		 
		 
		 /**
		  * unicode 转换成 中文
		  * @author fanhui 2007-3-15
		  * @param theString
		  * @return
		  */
		 public static String decodeUnicode(String theString) {
			  char aChar;
			  int len = theString.length();
			  StringBuffer outBuffer = new StringBuffer(len);
			  for (int x = 0; x < len;) {
				   aChar = theString.charAt(x++);
				   if (aChar == '\\') {
					    aChar = theString.charAt(x++);
					    if (aChar == 'u') {
						     int value = 0;
						     for (int i = 0; i < 4; i++) {
						      aChar = theString.charAt(x++);
						      switch (aChar) {
						      case '0':
						      case '1':
						      case '2':
						      case '3':
						      case '4':
						      case '5':
						      case '6':
						      case '7':
						      case '8':
						      case '9':
						       value = (value << 4) + aChar - '0';
						       break;
						      case 'a':
						      case 'b':
						      case 'c':
						      case 'd':
						      case 'e':
						      case 'f':
						       value = (value << 4) + 10 + aChar - 'a';
						       break;
						      case 'A':
						      case 'B':
						      case 'C':
						      case 'D':
						      case 'E':
						      case 'F':
						       value = (value << 4) + 10 + aChar - 'A';
						       break;
						      default:
						       throw new IllegalArgumentException(
						         "Malformed      encoding.");
						      }
						     }
						     outBuffer.append((char) value);
					    } else {
						     if (aChar == 't') {
						      aChar = '\t';
						     } else if (aChar == 'r') {
						      aChar = '\r';
						     } else if (aChar == 'n') {
						      aChar = '\n';
						     } else if (aChar == 'f') {
						      aChar = '\f';
						     }
						     outBuffer.append(aChar);
					    }
				   } else {
					   outBuffer.append(aChar);
				   }
			  }
			  
			  return outBuffer.toString();
			 }
		 
//		  测试
		/* public static void main(String[] args) {
			  AddressUtils addressUtils = new AddressUtils();
			  // 测试ip 219.136.134.157 中国=华南=广东省=广州市=越秀区=电信
			  String ip = "127.0.0.1";
			  String address = "";
			  try {
				  address = addressUtils.getAddresses("ip="+ip, "utf-8");
				  
				  
				  
				  if(address!=null && address.length() >= 2){
					  if(address.indexOf("内蒙古") != -1 || address.indexOf("黑龙江")!=-1){
						  address = address.substring(0,3);
					  }else if(address.indexOf("香港") != -1 || address.indexOf("澳门") !=-1 || address.indexOf("台湾") !=-1){
						  address = "港澳台";
					  }else{
						  address = address.substring(0,2);
					  }
				  }
				  
			  } catch (UnsupportedEncodingException e) {
				  e.printStackTrace();
			  }
			  System.out.println(address);
		 }*/
	}

String ip = request.getHeader("x-forwarded-for");
		    if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
		        ip = request.getHeader("Proxy-Client-IP");
		    }
		    if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
		        ip = request.getHeader("WL-Proxy-Client-IP");
		    }
		    if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
		        ip = request.getRemoteAddr();
		    }