javax.validation.ValidationException: Unable to find a default provider

If you are using Maven, you must add a dependency to the Hibernate Validator Annotation Processor.

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-validator-annotation-processor</artifactId>
  <version>4.1.0.Final</version>
</dependency>

Add - com.springsource.org.hibernate.validator.jar