I am working on a project where we will be using Spring MVC (as opposed
to Struts). In looking at Spring MVC, it seems to have it own
validation mechanism. My question is, does Spring have the equivalent
of "built-in" validators like date, credit card, email, etc, or would
we have to write our own?

Have some projects somehow been able to integrate Spring MVC with the
commons validation framework?  If so, how can this be done?

We are at the point where we have to start making final decisions that
will affect design, so I am interested in what approaches people have
take with Spring MVC.

Thanks in advance