Integrating Spring MVC 3.0 with JSR 303 (aka javax.validation.*) Annotated POJO validation comes to a JDK near you! The new annotated validation spec (jsr 303) is pretty slick, especially when used along side Spring MVC 3.0, and when backed by ejb3 entities. I’m pretty impressed with how easily it integrates with Spring MVC’s framework, and with how seamlessly error messages are passed to the form