Sure, it's possible to use Ant for enterprise builds, but here's the thing: You'll coax so much more mileage out of your EJB 3 and Seam-based projects by building them with Maven 2.

Maven isn't built on top of Ant, but it can take advantage of, and even generate, Ant build scripts. In order to use Maven, you must first create a Project Object Model (POM).

Maven provides consistent project structures, declarative configuration, and a wide range of plugins, along with a centralized repository for storing and downloading third-party software.