java中获取用户的真实ip

获取登录用户的真实ip地址：

/**
     * 用于获取用户客户端真实的IP地址
     *
     * @param request
     * @return
     */
    public static String getClentIp(HttpServletRequest request) {
        String ip = "";
        try {
            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();
            }
           
        } catch (Exception e) {
            LOG.warn(“客户端IP异常 : " + ExceptionUtil.print(e));
        }
        return ip;
    }