After many months of polishing, we are happy to release Hibernate Validator 4. This is a major milestone for Hibernate Validator with tons of new features and a spec compliance.
Here is the latest draft before sending Bean Validation (JSR 303) to final stage (in pdf). For the few who don't know yet ( ;) ), Bean Validation standardizes constraint declaration, definition, validation and metadata for the Java platform. Said otherwise, add an annotation to a property and hop it's validated.
Bean Validation's public draft has now been approved by the EC (all members voting yes except Nortel and SpringSource who did not vote).