prevent browser from cahing my pages

[tubin gen]

I want to add nocache header to my pages ,

code from WebPage

        response.setHeader("Pragma", "no-cache");
        response.setHeader("Cache-Control", "no-cache, max-age=0,
must-revalidate"); // no-store


and I also added

        response.setHeader("Cache-Control","no-cache");
        response.setDateHeader ("Expires", -1);
by overriding
   @Override
    protected void setHeaders(WebResponse response) {
        super.setHeaders(response);
        response.setHeader("Cache-Control","no-cache");
        response.setDateHeader ("Expires", -1);
    }


but the browser is still caching the pages , I hit the back button or
forward button the page is not refreshed , please tell me how   to prevent
browser from chaching my pages.