Why can't I use Valid parameter along with RequestParam in Spring MVC?

Question

Example:

public String getStudentResult(@RequestParam(value = \"regNo\", required = true) String regNo, ModelMap model){

How can I use @v

Answer 1

one way to do it is to write a Wrapper Bean like the following :

 public class RegWrapperBean{

        @NotNull
        String regNo ; 

        public String getRegNo(){
             return regNo ;
        }

        public void setRegNo(String str){
             this.regNo=str;
        }

}

and your handler method will be like the following :

  @RequestMapping(value="/getStudentResult", method=RequestMethod.POST)
    public String getStudentResult(@Valid @ModelAttribute RegWrapperBean bean,
            BindingResult validationResult, Model model) {
    }

and please refer to these answers here and here .

Hope that Helps .