获取客户端ip地址工具类

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获取客户端ip地址工具类package com.baomidou.kisso.common;import java.net.InetAddress;import java.net.UnknownHostException;import java.util.logging.Logger;import javax.servlet.http.HttpServletRequest;/** * <p> * 获取IP地址类 * </p> *  * @author hubin * @Date 2014-5-8 */public class IpHelper {   private static final Logger logger = Logger.getLogger("IpHelper");   private static String LOCAL_IP_STAR_STR = "192.168.";   static {      String ip = null;      String hostName = null;      try {         hostName = InetAddress.getLocalHost().getHostName();         InetAddress ipAddr[] = InetAddress.getAllByName(hostName);         for (int i = 0; i < ipAddr.length; i++) {            ip = ipAddr[i].getHostAddress();            if (ip.startsWith(LOCAL_IP_STAR_STR)) {               break;            }         }         if (ip == null) {            ip = ipAddr[0].getHostAddress();         }      } catch (UnknownHostException e) {         logger.severe("IpHelper error.");         e.printStackTrace();      }      LOCAL_IP = ip;      HOST_NAME = hostName;   }   /** 系统的本地IP地址 */   public static final String LOCAL_IP;   /** 系统的本地服务器名 */   public static final String HOST_NAME;   /**    * <p>    *  获取客户端的IP地址的方法是：request.getRemoteAddr()，这种方法在大部分情况下都是有效的。    *  但是在通过了Apache,Squid等反向代理软件就不能获取到客户端的真实IP地址了，如果通过了多级反向代理的话，    *  X-Forwarded-For的值并不止一个，而是一串IP值， 究竟哪个才是真正的用户端的真实IP呢？    *  答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。    *  例如：X-Forwarded-For：192.168.1.110, 192.168.1.120,    *  192.168.1.130, 192.168.1.100 用户真实IP为： 192.168.1.110    *  </p>    *      * @param request    * @return    */   public static String getIpAddr(HttpServletRequest request) {      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();         if (ip.equals("127.0.0.1")) {            /** 根据网卡取本机配置的IP */            InetAddress inet = null;            try {               inet = InetAddress.getLocalHost();               ip = inet.getHostAddress();            } catch (UnknownHostException e) {               logger.severe("IpHelper error." + e.toString());            }         }      }      /**       * 对于通过多个代理的情况， 第一个IP为客户端真实IP,多个IP按照','分割 "***.***.***.***".length() =       * 15       */      if (ip != null && ip.length() > 15) {         if (ip.indexOf(",") > 0) {            ip = ip.substring(0, ip.indexOf(","));         }      }      return ip;   }}
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