获取客户端IP地址

public static String getIp(HttpServletRequest request) {
         String ip = request.getHeader("X-Forwarded-For");
         if(StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)){
             //多次反向代理后会有多个ip值，第一个ip才是真实ip
             int index = ip.indexOf(",");
             if(index != -1){
                 return ip.substring(0,index);
             }else{
                 return ip;
            }
        }
        ip = request.getHeader("X-Real-IP");
        if(StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)){
            return ip;
        }
        return request.getRemoteAddr();
    }
	
	
	
	
	/**
	 * 
	 * 功能:获取IP地址
	 * 作者: Administrator
	 * 创建日期:2010-10-27
	 * @param request
	 * @return
	 */
	public 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();
		}
		return ip;
	}