What setup do I need to do to use JSR-303 annotations with Spring?

I downloaded spring 3 and put it on my classpath but I'm not able to import the @Valid annotation. However, I am able to import other spring 3 annotations (such as @Controller). What Jar is @Valid in and what package?

EDIT: This is a JSR-303 annotation. What do开发者_JAVA技巧es that mean and how do I get it?

javax.validation is missing.

You'll find a jar here. If you use Maven, this is the dependency:

<dependency>
  <groupId>javax.validation</groupId>
  <artifactId>validation-api</artifactId>
  <version>1.0.0.GA</version>
</dependency>

For validation to actually work, you need an implementation as well, such as Hibernate Validator. Maven dependency:

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-validator</artifactId>
  <version>4.0.2.GA</version>
  <scope>runtime</scope>
</dependency>

The JSR reference means that this is a standard developed by the Java Community Process, specifically JSR number 303.

Just for completeness, now it's also available the next versión of the spec, that's it JSR 349, which can be obtained with:

<dependency>
  <groupId>javax.validation</groupId>
  <artifactId>validation-api</artifactId>
  <version>1.1.0.Final</version>
</dependency>

Hibernate Validator 5.x is the reference implementation for JSR 349 - Bean Validation 1.1 of which Red Hat is the specification lead.

You should be able to get it from hibernate-validator.

It's not a spring annotation, it's from javaee and goes by javax.validation.Valid, hence the JSR reference.