which beanValidator should be used with constrain validation

[samsam007]

Hi,

With spring mvc 3.0, I am confused about using BeanValidator with constrain validation.:

Set<ConstraintViolation<AdminSignupBean>> violations = beanValidator.validate(adminsignup);
                for(ConstraintViolation<AdminSignupBean> violation : violations) {
                    logger.debug("=========Violation Message:- " + violation.getMessage());
                }

The beanValidator as shown above is confusing me, I can't find an import lib to use.
This example is referenced with an example in the following link:

http://stackoverflow.com/questions/1972933/cross-field-validation-with-hibernate-validator-jsr-303


Any suggestion is very appreciated.
Thanks
Sam