Java:根据ip获取对应的省市区

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 net.sf.json.JSONObject;

/**
 * 根据IP地址获取详细的地域信息
 * 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
 * @File AddressUtils.java
 * @Package org.gditc.weicommunity.util
 * @Description TODO
 * @Copyright Copyright © 2014
 * @Site https://github.com/Cryhelyxx
 * @Blog http://blog.csdn.net/Cryhelyxx
 * @Email [e-mail]
 * @Company GDITC
 * @Date 2014年11月6日 下午1:46:37
 * @author Cryhelyxx
 * @version 1.0
 */
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
//	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 = "122.49.20.247";
//		String address = "";
//		try {
//			address = addressUtils.getAddresses("ip="+ip, "utf-8");
//		} catch (UnsupportedEncodingException e) {
//			// TODO Auto-generated catch block
//			e.printStackTrace();
//		}
//		System.out.println(address);
//		// 输出结果为：广东省,广州市,越秀区
//	}
	
	
	public static void main(String[] args)
	{
		try
		{
			getAddressByIp();
		}
		catch (Exception e)
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public static  void getAddressByIp() throws Exception {
		// 参数ip
//		String ip = "219.136.134.157";
		String ip = "221.235.44.19";
		
		// json_result用于接收返回的json数据
		String json_result = null;
		try {
			json_result = AddressUtils.getAddresses("ip=" + ip, "utf-8");
		} catch (UnsupportedEncodingException e) {
			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);
	}
}

打印结果：

(1) unicode转换成中文前的returnStr : {"code":0,"data":{"country":"\u4e2d\u56fd","country_id":"CN","area":"\u534e\u4e2d","area_id":"400000","region":"\u6e56\u5317\u7701","region_id":"420000","city":"\u6b66\u6c49\u5e02","city_id":"420100","county":"","county_id":"-1","isp":"\u7535\u4fe1","isp_id":"100017","ip":"119.97.247.62"}}
(2) unicode转换成中文后的returnStr : {"code":0,"data":{"country":"中国","country_id":"CN","area":"华中","area_id":"400000","region":"湖北省","region_id":"420000","city":"武汉市","city_id":"420100","county":"","county_id":"-1","isp":"电信","isp_id":"100017","ip":"119.97.247.62"}}
json数据： {"code":0,"data":{"country":"中国","country_id":"CN","area":"华中","area_id":"400000","region":"湖北省","region_id":"420000","city":"武汉市","city_id":"420100","county":"","county_id":"-1","isp":"电信","isp_id":"100017","ip":"119.97.247.62"}}
国家： 中国
地区： 华中
省份: 湖北省
城市： 武汉市
区/县： 
互联网服务提供商： 电信
中国/湖北省/武汉市/