public static String getIpAddress(HttpServletRequest request) {
        // 從X-Real-IP獲取真實ip
        String ip = request.getHeader("X-Real-IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        // 從x-forwarded-for獲取真實ip
        ip = request.getHeader("x-forwarded-for");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) {
            // 對於通過多個代理的情況，第一個IP為客戶端真實IP,多個IP按照','分割
            int index = ip.indexOf(",");
            if (index > 0) {
                ip = ip.substring(0, ip.indexOf(","));
            }
            return ip;
        }
        ip = request.getHeader("Proxy-Client-IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getHeader("WL-Proxy-Client-IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getHeader("HTTP_CLIENT_IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getRemoteAddr();
        if ("127.0.0.1".equals(ip) || "0:0:0:0:0:0:0:1".equals(ip)) {
            // 根據網絡卡取本機配置的IP
            try {
                ip = InetAddress.getLocalHost().getHostAddress();
            } catch (UnknownHostException e) {
                // e.printStackTrace();
            }
        }
        return ip;
    }