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Struts 2 – Architecture

From a high level, Struts2 is a pull-MVC (or MVC2) framework. The Model-ViewController pattern in Struts2 is implemented with the following five core components u2212<br><br>Actions<br>Interceptors<br>Value Stack / OGNL<br>Results / Result types<br>View technologies

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Struts 2 – Architecture

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  1. Welcome to Ducat India Language | Industrial Training | Digital Marketing | Web Technology | Testing+ | Database | Networking | Mobile Application | ERP | Graphic | Big Data | Cloud Computing Apply Now Training & Certification 70-70-90-50-90 www.ducatindia.com

  2. Struts 2 – Architecture • From a high level, Struts2 is a pull-MVC (or MVC2) framework. The Model-ViewController pattern in Struts2 is implemented with the following five core components − • Actions • Interceptors • Value Stack / OGNL • Results / Result types • View technologies • Struts 2 is slightly different from a traditional MVC framework, where the action takes the role of the model rather than the controller, although there is some overlap.

  3. Request Life Cycle • Based on the above diagram, you can understand the work flow through user’s request life cycle in Struts 2 as follows − • User sends a request to the server for requesting for some resource (i.e. pages). • The Filter Dispatcher looks at the request and then determines the appropriate Action. • Configured interceptor functionalities applies such as validation, file upload etc. • Selected action is performed based on the requested operation. • Again, configured interceptors are applied to do any post-processing if required. • Finally, the result is prepared by the view and returns the result to the user. • Sturts2 Example • As we have already learnt from the Struts 2 architecture, when you click on a hyperlink or submit an HTML form in a Struts 2 web-application, the input is collected by the Controller which is sent to a Java class called Actions. After the Action is executed, a result selects a resource to render the response. The resource is generally a JSP, but it can also be a PDF file, an Excel spreadsheet, or a Java applet window. • Assuming that you already have built your development environment. Now, let us proceed for building our first Hello World Struts2 project. The aim of this project is to build a web application that collects the user’s name and displays “Hello World” followed by the user name. • Read More: https://tutorials.ducatindia.com/java/struts-2-architecture/

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