A model represents an application’s data and contains the logic for accessing and manipulating that data. Any data that is part of the persistent state of the application should reside in the model objects. The business objects update the application state. ActionForm bean represents the Model state at a session or request level, and not at a persistent level. Model services are accessed by the controller for either querying or effecting a change in the model state. The model notifies the view when a state change occurs in the model.The JSP file reads information from the ActionForm bean using JSP tags.

The Struts frame work doen't offer much in the way pf building model components. The Enterprise JavaBeans (EJB), Java Data Objects(JDO) and JavaBeans can be use as a model. Struts frame work doesn't limit you to one particular model implementation.