jsp - How to use Cache-Control and Expires headers in Java Server Pages -


i ran site in pagespeed. tells me:

setting expiry date or maximum age in http headers static resources instructs browser load downloaded resources local disk rather on network.

i tried implement according @ https://developers.google.com/speed/docs/best-practices/caching, , in other ways.

but, far didn't succeed. maybe can me how it.

i prefer keep images in cache.

anyway love know how can manage saving , not saving files in cache

my site being developed google application engine , java server pages.

cache-control http header controls caching between server , client. set using httpservletresponse this:

httpresponse.addheader("cache-control", "max-age=60");

where 60 number of seconds cache for.


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