Bean Validation and JSR 303 | Java | DZone

Bean Validation and JSR 303 | Java | DZone

JSR 303 Bean Validation

Finally, JSR 303 came to fruitition. Two important facts: it is end-agnostic, meaning you can use it anywhere you like (front-end, back-end, even DTO if you follow this pattern) and its reference implementation is Hibernate Validator v4.

JSR 303 features include:

• validation on two different levels: attribute or entire bean. That was not possible with Hibernate Validator (since it was database oriented) and only possible with much limitations with Commons Validator
• i18n ready and message are parameterized
• extensible with your own validators
• configurable with annotations or XML. In the following, only the annotation configuration will be shown

In JSR 303, validation is the result of the interaction between:

• the annotation itself. Some come with JSR 303, but you can build your own
• the class that will validate the annotated bean

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