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How do you pass parameters to Struts Action class?

How do you pass parameters to Struts Action class?

In this method, we have to do the following:

  1. Declare a property named params of type Map – this map will hold all the parameters passed to the action class from the struts. xml file.
  2. Make the action class implementing the com. opensymphony. xwork2. config. entities.

What is the difference between Struts 1 and Struts 2?

Struts 1 requires Action classes to extend an abstract base class. An Struts 2 Action may implement an Action interface, along with other interfaces to enable optional and custom services. Struts 2 provides a base ActionSupport class to implement commonly used interfaces.

How does Struts define action class?

Action Class in Struts framework defines the business logic. An action class handles the client request and prepares the response. It also decides where the response should be forwarded. Basically an action class receives data from the presentation layer and forwards the data to the corresponding business layer.

How does Struts action forward work?

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.

How do you access URL parameters in action classes in Struts 2?

S2 provides a clean way to fetch the request parameters in you action class all you need to follow these simple rules.

  1. Create a property with same name as request parameter name.
  2. create getter and setters for this property or make property public (for S2.1+)

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.

What is POJO based actions?

In struts 2, action class is POJO (Plain Old Java Object). POJO means you are not forced to implement any interface or extend any class.

How exceptions are handled in Struts application?

There are two methods for handing uncaught exceptions in Struts: Global exception handling: specifies exception mappings (exception type – view name) which apply to all action classes in a Struts package. Exception handling per action: specifies exception mappings which apply to a specific action class.