Java - Google App Engine - Java How to refresh jsp page?

I'm new to Google App Engine and i'm having a little problem that i can't seem to be able to find the solution to.
Whenever i create/delete/update something from the Datastore, in the end i do this:
resp.sendRedirect("/view_list.jsp");
And the page doesn't get updated.
For instance, if i have a page with a list of 2 items, then i create another item and i redirect to that page with the list, and instead of showing 3 items, it shows 2 items, until i change page and come back.
So how can i make sure that the page refreshs after my changes to the Datastore?


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