Using Bean Validation for data validation

You can use Bean Validation to constrain your data in many different ways. In this recipe, we are going to use it to validate a JSF form, so we can validate it as soon as the user tries to submit it, and avoid any invalid data right away.

Getting ready

First, we add our dependencies:

        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate.validator</groupId>
            <artifactId>hibernate-validator</artifactId>
            &lt...