How to check when webpage reload button is pressed in Java

Question

I'm using JSP-s and Servlets, and I don't know how to check if a client asks for reloading the page. I need to redirect to homepage whenever a user tries to reload. Is there any method like request.getAction(); so that I can check if it equals to "reload"? Thank you.

Answer 1

Java plays on server side and Javascript plays on client end.

request.getAction();

Is server side code and reload happens on client end.

You need some javascript to know it

window.onbeforeunload = funcRef