/**  

     * 获取请求的来源ip

     *

     * @param request

     * @return 

     */

public static String getRequestSrcIp(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 != null) {

            final int idx = ip.indexOf(',');

            if (idx > -1) {

                ip = ip.substring(0, idx);

            }

        }

        return ip;

    }