Web Component Development Using Servlet & JSP Technologies (EE6) - Chapter 3 - Implementing an MVC Design
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This document outlines the objectives and implementation steps for developing a Model-View-Controller (MVC) architecture using servlet and JSP technologies in Java EE 6. It provides guidance on how to implement the controller, model, and view components, along with mechanisms for data forwarding and attribute handling between servlets and JSP pages. Additionally, it details the essential components needed for a complete MVC solution.
Web Component Development Using Servlet & JSP Technologies (EE6) - Chapter 3 - Implementing an MVC Design
- 1. Web Component Development with Servlet & JSP Technologies (EE 6) Module-3: Implementing an MVC Design Team Emertxe
- 2. www.webstackacademy.com Objectives Upon completion of this module, you should be able to: ● Implement the controller design using a Servlet ● Implement the model design using a POJO ● Implement the view design element using a JSP and the expression language(EL) ● Connect the model view and controller element to implement a working MVC solution
- 3. www.webstackacademy.com Relevance Discussion – The following questions are relevant to understanding how to develop a controller component: ● How can you implement the controller? ● How can you implement the model? ● How can you implement the view?
- 4. www.webstackacademy.com Forwarding From a Servlet to a JSP The mechanism used to invoke the JSP page is called forwarding. Code to perform this is shown below. RequestDispatcher rd = request.getRequestDispatcher("view.jsp"); rd.forward(request, response);
- 5. www.webstackacademy.com Passing Data From the Servlet to JSP ServletRequest.getAttribute(String key) ServletRequest.setAttribute(String key, Object value) So, if a controller servlet writes a data item into an attributed using the following code: request.setAttribute("aValue", 99); Then the value can be read in a JSP page using this syntax: ${aValue}
- 6. www.webstackacademy.com A Complete MVC Example To create a complete MVC, we need the following: 1. Controller class 2. The model class 3. JSP page
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