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What is Controller in MVC ?
Is it struts.xml or Servlet (Action Class)?
Can we have more than one Controller in our application?
Is it good practice to have more than one controller?
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The controller component in an MVC application has several responsibilities, including receiving input from a client, invoking a business operation, and coordinating the view to return to the client.
Struts is an open source framework that extends the Java Servlet API and employs a Model, View, Controller (MVC) architecture. It enables you to create maintainable, extensible, and flexible web applications based on standard technologies, such as JSP pages, JavaBeans, resource bundles, and XML.
Front Controller is StrutsPrepareAndExecuteFilter. It uses the concept of RequestProcessor class while processing request. It uses the concept of Interceptors while processing the request. It has only JSP for the view component.
Struts 1 is based on Servlets. It has one ActionServlet that acts as its controller.
In Struts, application Controller layer code/functionality is split into two parts:
ActionServlet with RequestHandler
Action classesActionServlet acts like FrontController pattern.
Image from this OnJava article.
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