java 根据ip获取地理位置

package com.hpczy.common.utils;

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 java.net.URLConnection;

import net.sf.json.JSONObject;

public class AddressUtils {

//ps:下面参数ip:	218.192.3.42 用于测试
//淘宝API：http://ip.taobao.com/service/getIpInfo.php?ip=218.192.3.42
//新浪API：http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip=218.192.3.42
//pconline API：http://whois.pconline.com.cn/
//百度API：http://api.map.baidu.com/location/ip?ip=218.192.3.42
/**
 * 
 * @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 getRealAddressByIP(String content, String encodingString)
		throws UnsupportedEncodingException {
	// 这里调用淘宝API
	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("(1) unicode转换成中文前的returnStr : " + returnStr);
		returnStr = decodeUnicode(returnStr);
		System.out.println("(2) unicode转换成中文后的returnStr : " + returnStr);
		String[] temp = returnStr.split(",");
		if(temp.length<3){
			return "0";//无效IP，局域网测试
		}
		return returnStr;
	}
	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
/**
 * @param args
 */
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 = "219.136.134.157";
	String json_result  = "";
	try {
		json_result  = addressUtils.getRealAddressByIP("ip="+ip, "utf-8");
	} catch (UnsupportedEncodingException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	JSONObject json = JSONObject.fromObject(json_result);
	System.out.println("json数据： " + json);
	String country = JSONObject.fromObject(json.get("data")).get("country").toString();
	String region = JSONObject.fromObject(json.get("data")).get("region").toString();
	String city = JSONObject.fromObject(json.get("data")).get("city").toString();
	String county = JSONObject.fromObject(json.get("data")).get("county").toString();
	String isp = JSONObject.fromObject(json.get("data")).get("isp").toString();
	String area = JSONObject.fromObject(json.get("data")).get("area").toString();
	System.out.println("国家： " + country);
	System.out.println("地区： " + area);
	System.out.println("省份: " + region);
	System.out.println("城市： " + city);
	System.out.println("区/县： " + county);
	System.out.println("互联网服务提供商： " + isp);
	
	String address = country + "/";
	address += region + "/";
	address += city + "/";
	address += county;
	System.out.println(address);
	// 输出结果为：广东省,广州市,越秀区
	
}

}

//原文：https://blog.youkuaiyun.com/Cryhelyxx/article/details/40862101