ActionMappings is a collection of ActionMapping objects
The ActionMapping contains the knowledge of how a specific event maps to specific Actions.
The ActionServlet (Command) passes the ActionMapping to the Action class via the perform() method.
This allows Action to access the information to control flow.
The struts-config.xml determines what Action class the Controller calls.
The struts-config.xml configuration information is translated into a set of ActionMapping, which are put into container of ActionMappings.
Classes that end with s are containers.
