When I redirect a request from a Servlet to a JSP, the browser
caches the JSP and won't display an updated page without reloading.
How do I prevent the page from being cached?
The HTTP/1.1 specification specifies a header called Cache-Control,
that can be used to alter the caching behavior of clients and
intermediate proxy servers. Setting the value of this header to
"no-cache" causes an HTTP response not to be stored by any intervening
caches. However, HTTP/1.0 clients may not recognize the Cache-Control
header. For these clients, adding a Pragma header field with the
value "no-cache" will serve the same purpose, but not all HTTP/1.0
clients will necessarily recognize this header. To account for
HTTP/1.0 clients that don't recognize a "Pragma: no-cache" header, you
can set the expiration time of the response to a past date using the
Expires date header field. Here's an example of how to do this within
a JSP page using the response variable, which is an instance of
Make sure to set these headers before your JSP page produces any
output, otherwise the headers may not take effect.