MVC play biggest role in struts2 framework because MVC separates design concerns (data persistence and behavior, presentation, and control), centralizing control, decreasing code duplication, and making the application more easily modifiable.

 
There are two types of MVC design pattern

MVC-1 Design Pattern:- MVC -1 have more than one controllers .Each request may have own controller in case of MVC-1.We can create controller using JSP or Servelet.



MVC-2 Design Pattern:-  MVC-2 has only one controller .The servelet is used to create controller for MVC-2.All      request must be handled by single controller and only this controller can decide the response GUI on the basis of model calculation and manipulations.


 


Struts 1.3 Tutorial and Example
Spring 2.5 Tutorial and Example
Spring 2.5 MVC Tutorial
Spring 2.5 MVC Example