com.liferay.portal.struts
Interfaces 
InitializableActionForm
Classes 
Action
ActionConstants
AJAXAction
DynamicPortletAction
JSONAction
LastPath
MultiMessageResources
MultiMessageResourcesFactory
PortalRequestProcessor
PortalTilesPlugin
PortletAction
PortletActionServlet
PortletRequestProcessor
SessionAction
SimpleAction
StrutsActionPortletURL
StrutsURLEncoder
StrutsUtil
Exceptions 
ActionException