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.
It's not working as written because OGNL doesn't search JEE scopes. You need to explicitly tell OGNL to look in the request scope.
That said, Nishan's point is well-taken--there's no reason to do it like this, twice over. If you *are* dead-set on putting an object in the request it's much, much cleaner to implement RequestAware as opposed to ServletRequestAware. RequestAware doesn't tie your action to the servlet spec, making it significantly easier to test in isolation.
But again, simply exposing your ArrayList as an action property is cleaner, and your original JSP would work.
On a final note, in general we shouldn't define our variables as ArrayList, but as List or Collection: the implementation of the list is a detail we're only rarely concerned about in cases like this.