java获取客户端IP地址

package com.viathink.utils;



import javax.servlet.http.HttpServletRequest;



/**

* Ip地址工具类

* @author LiuJunGuang

* @date 2014年2月22日下午3:02:41

*/

public class IpUtils {

/**

* 获取客户端IP地址

* @author LiuJunGuang

* @param request

* @return

* @date 2014年2月22日下午3:03:05

*/

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.getHeader("HTTP_CLIENT_IP");

}

if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

ip = request.getHeader("HTTP_X_FORWARDED_FOR");

}

if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {

ip = request.getRemoteAddr();

}

return ip;

}

}