public void doFilter(
ServletRequest request,
ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletResponse httpResponse = (HttpServletResponse) response;
httpResponse.addDateHeader("Expire", 0L);
httpResponse.addHeader("Pragma", "no-cache");
httpResponse.addHeader("Cache-Control", "no-cache, must-revalidate, post-check=0, pre-check=0");
chain.doFilter(request, response);
}