From a Distribution
A distribution of Struts 2 is not yet available. For now, the only option is to check out the source code from the repository (Subversion). A Struts 2 distribution is expected by August 2006.
The latest releases, including beta releases, can be downloaded from the Apache Struts Project.
From the Repository
Use Subversion to checkout the source code.
> svn co https://svn.apache.org/repos/asf/struts/action2/trunk/
Use Maven 2 to build a distribution.
> mvn install
For a detailed description, see Building the Framework from Source.