Top Most Difference between Struts 1 and Struts 2 framework

I had work previously on Struts 1 but never touched Struts 2, specially since Spring MVC was there to take the leading role. Recently one of my friend ask me to help with Struts2, which leads me to look on Struts2 framework from start. First thing I wanted to find out differences between Struts 1 and Struts 2 framework, because in my experience, if you have worked in previous version looking differences between two versions of Struts can quickly help to find, what changes and What are the new features, concepts and improvement is offered by Struts 2. Also difference between Struts 1 and Struts 2 is a good candidate to include in my list of Struts interview questionfor quick revision. To my surprise, Struts 2 seems to be completely different than Struts 1 framework, because some of the most familiar stuff like ActionForm, struts-config.xml, and Action classes are changed in Struts 2 framework. Struts 2 has also done good job on removing direct dependency of Action classes on Servlet API e.g. HttpServletRequest and HttpServletResponse, which makes testing easy by using Dependency Injection concept. In this article, we will some important differences between Struts 1 and Struts 2 framework.

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