For JSR-303 bean validation to work in Spring, you need several things:
- MVC namespace configuration for annotations:
<mvc:annotation-driven />
- The JSR-303 spec JAR:
validation-api-1.0.0.GA.jar
(looks like you already have that) - An implementation of the spec, such as Hibernate Validation, which appears to be the most commonly used example:
hibernate-validator-4.1.0.Final.jar
- In the bean to be validated, validation annotations, either from the spec JAR or from the implementation JAR (which you have already done)
- In the handler you want to validate, annotate the object you want to validate with
@Valid
, and then include aBindingResult
in the method signature to capture errors.
Example:
@RequestMapping("handler.do")
public String myHandler(@Valid @ModelAttribute("form") SomeFormBean myForm, BindingResult result, Model model) {
if(result.hasErrors()) {
...your error handling...
} else {
...your non-error handling....
}
}