What is strut action mapping?
What is strut action mapping?
An ActionMapping represents the information that the controller, RequestProcessor , knows about the mapping of a particular request to an instance of a particular Action class.
Which of the following is true about action tag in struts xml?
Q 13 – Which of the following is true about action tag in struts. xml? A – We define action tags corresponds to every URL we want to access. B – we define a class with execute() method which will be accessed whenever we will access corresponding URL.
What is action name struts2?
The action tag allows the programmers to execute an action from the view page. They can achieve this by specifying the action name. They can set the “executeResult” parameter to “true” to render the result directly in the view.
Where is struts default xml?
A base configuration file named struts-default. xml is included in the struts2-core. jar file.
What is struts2 interceptor ref?
Interceptor is an object that is invoked at the preprocessing and postprocessing of a request. In Struts 2, interceptor is used to perform operations such as validation, exception handling, internationalization, displaying intermediate result etc.
How does Struts action forward work?
An ActionForward represents a destination to which the controller, RequestProcessor, might be directed to perform a RequestDispatcher. forward or HttpServletResponse. sendRedirect to, as a result of processing activities of an Action class.
Which of the following feature is present in Struts 2?
The important features of struts 2 framework are as follows: Configurable MVC components. POJO based actions. AJAX support.
Which of the following is correct about Struts 2 validation framework?
Rather the Struts 2 framework will return input as the result of calling the action. Hence, when validation fails and Struts 2 returns input, the Struts 2 framework will redisplay the index. jsp file. Since, we used Struts 2 form tags, Struts 2 will automatically add the error messages just above the form filed.
What is Struts2 interceptor ref?
What is JSP action tags?
There are many JSP action tags or elements. Each JSP action tag is used to perform some specific tasks. The action tags are used to control the flow between pages and to use Java Bean.
What is parameter in Struts config xml?
In Struts1 you can use the attribute parameter from element(struts-config. xml) and access it’s value within the action class via the actionMapping. getParameter() method. For actions requiring multiple steps, the parameter is often used to indicate which step the mapping is associated with.
What is Struts config xml and its use?
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 interceptor ref?
What is valueStack in Struts2?
A valueStack is simply a stack that contains application specific objects such as action objects and other model object. At the execution time, action is placed on the top of the stack. We can put objects in the valuestack, query it and delete it.
What is action forward?
An ActionForward represents a destination to which the controller servlet, ActionServlet , might be directed to perform a RequestDispatcher. forward() or HttpServletResponse. sendRedirect() to, as a result of processing activities of an Action class.
What is action forward in Java?
What are the features of Struts?
The important features of struts 2 framework are as follows:
- Configurable MVC components.
- POJO based actions.
- AJAX support.
- Integration support.
- Various Result Types.
- Various Tag support.
- Theme and Template support.
What is xml based validation in Struts 2?
Struts2 XML based validation provides more options of validation like email validation, integer range validation, form validation field, expression validation, regex validation, required validation, requiredstring validation, stringlength validation and etc.
How many action tags are there in JSP?
eleven JSP action tags
There are in all eleven JSP action tags.
What are the different action tags?
- jsp:forward: is used for forwarding the request and response to other resources.
- jsp:include: is used for including another resource.
- jsp:body: is used for defining dynamically-defined body of XML element.
- jsp:useBean: is used for creating or locating bean objects.