How does interceptor work in Struts 2?
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.
What is difference between redirect and RedirectToAction?
RedirectToAction is meant for doing 302 redirects within your application and gives you an easier way to work with your route table. Redirect is meant for doing 302 redirects to everything else, specifically external URLs, but you can still redirect within your application, you just have to construct the URLs yourself.
What is type chain in Struts 2?
Request > Action 1 > Action 2 > Response In Struts 2, this can be achieved by Chain Result. The Chain Result is a result type that invokes an Action with its own Interceptor Stack and Result. This Interceptor allows an Action to forward requests to a target Action, while propagating the state of the source Action.
How does Struts 2 validation work?
When the user presses the submit button, Struts 2 will automatically execute the validate method and if any of the “if” statements listed inside the method are true, Struts 2 will call its addFieldError method. If any errors have been added, then Struts 2 will not proceed to call the execute method.
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 a data tag in Struts 2?
Struts 2 – Data Tags. The Struts 2 data tags are primarily used to manipulate the data displayed on a page. The Action Tag. This tag enables developers to call actions directly from a JSP page by specifying the action name and an optional namespace. The body content of the tag is used to render the results from the Action.
How do I redirect in Struts 2?
Struts 2 – Redirect Action. The redirect result type calls the standard response.sendRedirect() method, causing the browser to create a new request to the given location. We can provide the location either in the body of the element or as a element. Redirect also supports the parse parameter.
How to create demoaction class in Struts 2?
The action class in Struts 2 must be put in a package named action. In this package, create new java class named DemoAction.java as below: package controllers. action; import org. apache. struts2. convention. annotation.
How do I redirect a result to a specific location?
The redirect result type calls the standard response.sendRedirect () method, causing the browser to create a new request to the given location. We can provide the location either in the body of the element or as a element. Redirect also supports the parse parameter.