Why Struts are considered as extension of Servlet API?
Why Struts are considered as extension of Servlet API?
The Struts 1 action has dependencies on the Servlet API because the HttpServletRequest and HttpServletResponse are passed to the execute method when an action is invoked. Struts 2 uses JSTL, but it also supports a more flexible and powerful expression language called Object Graph Notation Language (OGNL).
What is the use of web xml file in Struts?
The web. xml web application descriptor file represents the core of the Java web application, so it is appropriate that it is also part of the core of the Struts framework. In the web. xml file, Struts defines its FilterDispatcher, the Servlet Filter class that initializes the Struts framework and handles all requests.
Which of the following class is a controller in Struts?
The struts Action class is effectively the Controller as it determines what should happen next in the processing of the request (from the browser). The Action class has an execute method that contains the controller logic.
How do I migrate from Struts 1 to Struts 2?
The easiest approach to migration is to add the Struts 2 JAR file (available from the Apache Project; see Resources) to the application and migrate code on one page at a time. Many changes are just a matter of removing Struts 1 classes and tags that are not needed and including what is required for Struts 2.
How does Struts-config xml work?
The controller servlet uses a struts-config. xml file to map incoming requests to Struts Action objects, and instantiate any ActionForm objects associated with the action to temporarily store form data. The Action object processes requests using its execute method, while making use of any data stored in the form bean.
What is MVC in Struts framework?
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.
What is filter dispatcher in struts?
1. 3. FilterDispatcher was the filter that was provided by Struts 2 for handling all request which needs to be controlled by struts framework. After Struts 2.1. 3 use of this filter was deprecated.
