What is the difference between Struts 1 and Struts 2?

Struts 2 Action objects are instantiated for each request, so there are no thread-safety issues. Struts 1 Actions have dependencies on the servlet API since the HttpServletRequest and HttpServletResponse is passed to the execute method when an Action is invoked. Struts 2 Actions are not coupled to a container.

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 to redirect in Struts2?

The redirect result type calls the standard response. sendRedirect() method, causing the browser to create a new request to the given location.

How to redirect an action in Struts 2?

So just modify your WebContent/WEB-INF/classes/struts.xml file to define redirect type as mentioned above − Here NewWorld.jsp is a new page where you will be redirected whenever your action retruns “success”. Let us keep WebContent/WEB-INF/lib/web.xml without any change, so its content will be as follows −

What’s the difference between Struts 1 and 2?

Front Controller strut 1.x – Front controller used is a servlet called the ActionServlet struts 2.x – A Filter called FilterDispatcher is used a the front controller. You may check the article How Struts 2 Works to have a good understanding of the working of struts 2. 2. ActionForms strut 1.x – ActonForms are used in Struts 1.

How are Struts 2 actions tested in isolation?

In Struts 2 Actions can be tested in isolation and the other architectural elements eliminate any need to access HttpServletRequest and HttpServletResponse. The next point is Testability. There is a major hurdle in testing Struts 1 Actions, that is that the execute method in Struts 1 exposes the Servlet API.

Is it mandatory to extend a base class in Struts 1?

In Struts 1 it mandatory to extend an abstract base class. This is also a very common problem in Struts 1; that is, it does programming to the abstract classes instead of the interfaces. In Struts 2 it may implement an Action interface along with various other interfaces to facilitate custom and optional services.