What is action class and ActionForm?
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Action classes are defined to handle request. Actions exist between Model and view of an application. The struts-config.xml file designates the Action classes that handle requests for various URLs.
What are the classes used in struts?
– The core classes of struts framework are:
- Action Mapping.
Does struts use servlet?
Struts MVC has some most used patterns implemented for web application development. Struts internally uses Servlet to dispatch requests to respective action. JSPs are still used in combination with JSTL for view purpose. Struts is used to develop enterprise applications.
How do struts work in Java?
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 the purpose of Execute method of action class?
The method execute is where we placed what we want this controller to do in response to the hello. action . Note that method execute declares it throws an Exception. We’ll cover in a later tutorial how to configure Struts to handle any Exceptions thrown from the Action classes methods.
Which one is a controller class 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. The Action class is a good example of the use of Command Pattern.
How to use formbean in ActionMapping with struts?
Once it is created, you have to specify a name for the FormBean in the struts configuration file Example: The form bean can be used in an Struts action. Below there is an example of an ActionMapping using our form bean. Example:
How to initialize the properties of the actionform class?
Initializing the properties of the ActionForm class Add an reset method to the actionForm class. This method is called by Struts when it initializes an ActionForm. You can define Default values to the form bean attributes in this method.
How do I return actionerrors in actionform?
return actionErrors; Initializing the properties of the ActionForm class Add an reset method to the actionForm class. This method is called by Struts when it initializes an ActionForm. You can define Default values to the form bean attributes in this method.
What is an actionform?
An ActionForm is a JavaBean optionally associated with one or more ActionMappings. Such a bean will have had its properties initialized from the corresponding request parameters before the corresonding action’s execute method is called.