You can use a ForwardAction. You won't require an action to be written for this, just set your type attribute of action tag in struts-config as org.apache.struts.actions.ForwardAction. Refer example below:
<!--example starts-->
<action path="/saveSubscription" type="org.apache.struts.actions.ForwardAction"
name="subscriptionForm"
scope="request"
input="/subscription.jsp"
parameter="/path/to/jsp"/>
<!--example ends-->
[ December 26, 2007: Message edited by: Pankaj Kap ]