An exciting feature of Struts 2 is configuration-free plugins. Third-party components can be added to the framework just by putting a JAR on the Java classpath. In fact, many of the framework's advanced features are provided by plugins that ship with Struts 2. A plugin repository site is open to the public [8], and several plugins are already available, including plugins for JSON, WebFlow, Google Web Toolkit, and Guice.
In my opinion
An exciting feature of Struts 2 is configuration-free plugins. Third-party components can be added to the framework just by putting a JAR on the Java classpath. In fact, many of the framework's advanced features are provided by plugins that ship with Struts 2. A plugin repository site is open to the public [8], and several plugins are already available, including plugins for JSON, WebFlow, Google Web Toolkit, and Guice.