How do you add an Expires
or a Cache-Control
header in JSP? I want to add a far-future expiration date in an include page for my static components such as images, CSS and JavaScript files.
To disable browser cache for JSP pages, create a Filter
which is mapped on an url-pattern
of *.jsp
and does basically the following in the doFilter()
method:
HttpServletResponse httpResponse = (HttpServletResponse) response;
httpResponse.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1
httpResponse.setHeader("Pragma", "no-cache"); // HTTP 1.0
httpResponse.setDateHeader("Expires", 0); // Proxies.
This way you don't need to copypaste this over all JSP pages and clutter them with scriptlets.
To enable browser cache for static components like CSS and JS, put them all in a common folder like /static
or /resources
and create a Filter
which is mapped on an url-pattern
of /static/*
or /resources/*
and does basically the following in the doFilter()
method:
httpResponse.setDateHeader("Expires", System.currentTimeMillis() + 604800000L); // 1 week in future.
See also: