content: package com.enterprise.util;
  
  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 javax.servlet.http.HttpServletRequest;
  
  import org.apache.commons.lang.StringUtils;
  
  public class AddressUtil {
  	/**
  	 * 获取ip
  	 * @param request
  	 * @return
  	 */
  	public static String getIp(HttpServletRequest request){
  		String ip = request.getHeader("x-forwarded-for");
  		if(ip == null || ip.length()==0 || "unknow".equalsIgnoreCase(ip)){
  			ip = request.getHeader("Proxy-Client-Ip");
  		}
  		if(ip == null || ip.length()==0 || "unknow".equalsIgnoreCase(ip)){
  			ip = request.getHeader("WL-Proxy-Client-IP");
  		}
  		if(ip == null || ip.length()==0 || "unknow".equalsIgnoreCase(ip)){
  			ip = request.getRemoteAddr();
  		}
  		return ip;
  	}
  	
  	public static String getAddress(String content,String encodingStr) throws UnsupportedEncodingException{
  		String url = "http://ip.taobao.com/service/getIpInfo.php";
  		String returnStr = getResult(url, content, encodingStr);
  		if(returnStr != null){
  			String[] temp = returnStr.split(",");
  			if(temp.length<3){
  				return "0";//无效ip
  			}
  			String region = (temp[5].split(":"))[1].replaceAll("\"", "");
  			String city = (temp[7].split(":"))[1].replaceAll("\"", "");
  			String isp = (temp[11].split(":"))[1].replaceAll("\"", "");
  			region = decodeUnicode(region);// 省份
  			city = decodeUnicode(city);// 省份
  			isp = decodeUnicode(isp);// 省份
  			if (StringUtils.isNotBlank(region) && StringUtils.isNotBlank(city) && StringUtils.isNotBlank(isp)) {
  				return region + city + "[" + isp + "]";
  			}
  		}
  		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;
  	}
  	
  	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();
  	}
  
  }
  