如何设置缓存控制/过期标头

Question

I want to use expires headers or Cache-Control, but I don't know how to do that. I searched a little bit on Google and I found different tags but I don't know if it's ok to use them or whether it's deprecated.

Example:

<META HTTP-EQUIV="Cache-Control" CONTENT="max-age=86400, must-revalidate"> 

I use Tomcat server and also found different methods to do that directly on server through web.xml file (which isn't working trough server settings).

If anyone can help me with a solution I will really appreciate.

Thank you.

Answer 1

In the Servlet.service method

response.setHeader("Cache-Control", "max-age=86400, must-revalidate");

Or put that in a filter.