It's very simple to enable validation on the controller method. The following snippet shows an example of this:

    @RequestMapping(method = RequestMethod.POST, path = "/users/{name}/todos")
    ResponseEntity<?> add(@PathVariable String name
                                      @Valid @RequestBody Todo todo) {

The @Valid(package javax.validation) annotation is used to mark a parameter for validation. Any validation that is defined in the Todo bean is executed before the add method is executed.