If the validation is successful
you should then be finding out what the forward is in your <action/> elements in the struts-config.xml file. So you might have something like
<action....
..>
<forward name="valid" path="/page.jsp" />
</action>
In this example, page.jsp is the same page, so when you come back to this page, you should have some data, a bean, or some request/session/application objects that you can deal with that were not there before.
So somewhere in your JSP page you would perform some logic to determine whether or not you are to display your data.
This is, at least, how I would approach it being somewhat new to STRUTS myself. But if someone has a better approach I would be happy to hear it.