java使用淘宝接口解析IP地址

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import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import com.fasterxml.jackson.databind.JsonNode;
import com.maxmind.db.Reader;
import org.json.JSONObject;

/**
 * IP地址解析工具类
 * 
 * @author Administrator
 *
 */
public class IPUtil {
	private static Reader reader;

	/**
	 * 通过IP获取地址（国家、省份、城市）
	 * 
	 * @param ip
	 * @return
	 */
	public static Map<String, String> getAddressByIP(String ip) {
		// 首先判断是否为内网ip
		if (isInnerIP(ip)) {
			return null;
		}
		Map<String, String> map = new HashMap<>();
		/*----------------------------------------使用淘宝接口解析IP start----------------------------------------------*/
		String path = "http://ip.taobao.com/service/getIpInfo.php";		
		String params="ip="+ip;
		String returnStr = getResultByUrl(path, params, "utf-8"); 
		JSONObject json = null;
		if (returnStr != null) {		 
			json = new JSONObject(returnStr);
			if ("0".equals(json.get("code").toString())) {
				//国家
				String country=decodeUnicode(json.optJSONObject("data").getString("country"));
				if (country != null){
					map.put("country", country);
				}												
				//省份
				String province=decodeUnicode(json.optJSONObject("data").getString("region"));
				if (province != null){
					map.put("province", province);
				}	
				//城市
				String city=decodeUnicode(json.optJSONObject("data").getString("city"));
				if (city != null){
					map.put("city", city);
				}	
			} 
		}
		/*----------------------------------------使用淘宝接口解析IP end -----------------------------------------------*/
		return map;
	}

	public static boolean isInnerIP(String ipAddress) {
		boolean isInnerIp = false;
		long ipNum = getIpNum(ipAddress);
		/**
		 * 私有IP：A类 10.0.0.0-10.255.255.255 B类 172.16.0.0-172.31.255.255 C类
		 * 192.168.0.0-192.168.255.255 当然，还有127这个网段是环回地址
		 **/
		long aBegin = getIpNum("10.0.0.0");
		long aEnd = getIpNum("10.255.255.255");
		long bBegin = getIpNum("172.16.0.0");
		long bEnd = getIpNum("172.31.255.255");
		long cBegin = getIpNum("192.168.0.0");
		long cEnd = getIpNum("192.168.255.255");
		isInnerIp = isInner(ipNum, aBegin, aEnd) || isInner(ipNum, bBegin, bEnd) || isInner(ipNum, cBegin, cEnd)|| ipAddress.equals("127.0.0.1");
		return isInnerIp;
	}

	private static long getIpNum(String ipAddress) {
		String[] ip = ipAddress.split("\\.");
		long a = Integer.parseInt(ip[0]);
		long b = Integer.parseInt(ip[1]);
		long c = Integer.parseInt(ip[2]);
		long d = Integer.parseInt(ip[3]);

		long ipNum = a * 256 * 256 * 256 + b * 256 * 256 + c * 256 + d;
		return ipNum;
	}

	private static boolean isInner(long userIp, long begin, long end) {
		return (userIp >= begin) && (userIp <= end);
	}

	/**
	 * 从url获取结果
	 * 
	 * @param path
	 * @param params
	 * @param encoding
	 * @return
	 */
	public static String getResultByUrl(String path, String params, String encoding) {
		URL url = null;
		HttpURLConnection connection = null;
		try {
			url = new URL(path);
			connection = (HttpURLConnection) url.openConnection();// 新建连接实例
			connection.setConnectTimeout(2000);// 设置连接超时时间，单位毫S
			connection.setReadTimeout(2000);// 设置读取数据超时时间，单位毫S
			connection.setDoInput(true);// 是否打开输出S true|false
			connection.setDoOutput(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());
			out.writeBytes(params);
			out.flush();
			out.close();

			BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), encoding));
			StringBuffer buffer = new StringBuffer();
			String line = "";
			while ((line = reader.readLine()) != null) {
				buffer.append(line);
			}
			reader.close();
			return buffer.toString();

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			connection.disconnect();// 关闭连接
		}
		return null;
	}

	/**
	 * 字符转码
	 * 
	 * @param theString
	 * @return
	 */
	public static String decodeUnicode(String theString) {
		char aChar;
		int len = theString.length();
		StringBuffer buffer = new StringBuffer(len);
		for (int i = 0; i < len;) {
			aChar = theString.charAt(i++);
			if (aChar == '\\') {
				aChar = theString.charAt(i++);
				if (aChar == 'u') {
					int val = 0;
					for (int j = 0; j < 4; j++) {
						aChar = theString.charAt(i++);
						switch (aChar) {
						case '0':
						case '1':
						case '2':
						case '3':
						case '4':
						case '5':
						case '6':
						case '7':
						case '8':
						case '9':
							val = (val << 4) + aChar - '0';
							break;
						case 'a':
						case 'b':
						case 'c':
						case 'd':
						case 'e':
						case 'f':
							val = (val << 4) + 10 + aChar - 'a';
							break;
						case 'A':
						case 'B':
						case 'C':
						case 'D':
						case 'E':
						case 'F':
							val = (val << 4) + 10 + aChar - 'A';
							break;
						default:
							throw new IllegalArgumentException("Malformed  encoding.");
						}
					}
					buffer.append((char) val);
				} else {
					if (aChar == 't') {
						aChar = '\t';
					}
					if (aChar == 'r') {
						aChar = '\r';
					}
					if (aChar == 'n') {
						aChar = '\n';
					}
					if (aChar == 'f') {
						aChar = '\f';
					}
					buffer.append(aChar);
				}
			} else {
				buffer.append(aChar);
			}
		}
		return buffer.toString();
	}
}