title: Can anyone explain the concept of Action and ActionForm?
body: <p>I am new to Struts2.On doing sample programs.I came to know that we are creating a class and extending <strong>Action</strong> and another one class extending <strong>Actionform</strong>.I dont know why we are doing that ?And I can understand that struts contains set of  <strong>custom tag libs</strong> which can be used .We are defining the Action tag and the appropriate form-bean.I could not find the concept and advantage behind this framework. Could anyone provide the links or books where i can find the struts concept.
  thanks in advance </p>