Many enterprise systems build at 2000 - 2010 uses J2EE old specifications with Struts web framework. But nowadays J2EE improved as Java EE, with standard web framework JSF 2. With this slides you can learn how to migrate old-styled J2EE + Struts systems to sophisticated Java EE with JSF 2 specification. This slides was used in Java Day Tokyo 2014 C4 window, presented by the author. And some slides is specialized for Japanese enterprise systems, but the theme is very standard and for almost all J2EE users in the world.