This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
There is no default mechanism for creating Rails-like scaffolding in the default distribution. You may be interesting in something like AppFuse, however, which can create a Struts 2 application (along with several other frameworks).
Of course, there's nothing stopping you from creating your own scaffolding mechanism, depending on your needs.