In the Spring Web MVC there are some helpers to improve the form data binding and validation.

1. In krazo, when the validation is failed, we have to rebuild the from data in the request. see my sample TaskController.java#L94-L104, but in Spring WebMVC, it is not required, check TaskController.java#L94-L97.
2. In Spring MVC, there are some helpers for the views, including, JSP tags, Thymeleaf tags, Freemarker Marco, etc, to help to build the form more effectively. If there any helpers planned in Krazo do the same job or add some methods like hasErrors(), getErrors() in MvcContext.