我有一个任务做一些行动（弹出窗口）的网站，如果用户第二次访问网站（任何网页）。我决定用servlet过滤器+cookie来实现它。但我多次遇到问题过滤器调用，我认为这与使用瓷砖有关。你能帮我把它修好吗？或者有人知道执行这个任务的最佳实践。
过滤器：

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {
    System.out.println("Do filter..............");

    final HttpServletRequest request = (HttpServletRequest) servletRequest;
    final HttpServletResponse response = (HttpServletResponse) servletResponse;
    String valueFromCookie = getCookieValue(request.getCookies(), EMAIL_POPUP_COOKIE);

    Cookie cookie = new Cookie(EMAIL_POPUP_COOKIE, "");
    cookie.setPath("/");
    cookie.setComment("Email Pop up cookie");
    cookie.setMaxAge(COOKIE_LIFE_TIME);

    if (valueFromCookie == null){
        String valueToCookie = URLEncoder.encode(FIRST_VISIT, "UTF-8");
        cookie.setValue(valueToCookie);
        response.addCookie(cookie);
    } else {
        if (valueFromCookie.equals(FIRST_VISIT)){
            String valueToCookie = URLEncoder.encode(NOT_SHOW, "UTF-8");
            cookie.setValue(valueToCookie);
            response.addCookie(cookie);
            System.out.println("STOP!=======================>");
        }
    }

    chain.doFilter(request, servletResponse);
}

web.xml部分：

<filter-mapping>
    <filter-name>EmailPopUp</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>