Introduction - If you have any usage issues, please Google them yourself
Struts2 is not inherited struts1 framework mechanism, but inherit webwork, because Struts2 webwork upgrade, Struts2 absorbs the advantages struts1 and webwork both, resulting in stability, performance and other areas have very good guarantee.
Apache Struts2 even before the WebWork2, after several years of development and webwork Struts2 community decided to merge, which is now the Struts2.