How Struts Works? - The basic purpose of the Java Servlets in struts is to handle requests made by the client or by web browsers. In struts JavaServerPages (JSP) are used to design the dynamic web pages. In struts, servlets helps to route request which has been made by the web browsers to the appropriate ServerPage.

a)Client makes a Http Request.
b)Every request has to go to the ActionServlet which
actually is the Front Controller of Struts.
c)ActionServlet calls the Request Processor for execution of the request.
d)Request Processor reads the xml file (Struts-config.xml) where the mappings have been provided for each and every
request and finds out the corresponding Action Class mapping to that request.
(1)How the mappings are provided in Struts-Config.xml file will be discussed under Configuring Recipe Module.
e)Before passing the control to the execute() method of the Action Class, it instantiates the Form Bean associated with
that Action Class. f)Once the Action Form/ Form Bean is instantiated, control goes to execute() method of Action Class.
g)Action Class then call the Business Layers to fetch the data requested by the client.
h)Once the data is fetched, it is populated in the Form Bean and control goes back to Action Class.
i)And finally, Action Class throws the control to JSP page where the data is rendered.
j)To render the data on JSP page, data is taken out of Form Bean with the help of Struts Tags.
k)Struts provides us with various Tag Libraries which makes the JSP page easy to create and maintain.
l)JSP Tags will be discussed later.