Validation with Spring MVC

Question

You guys talk beauty? Well, I started studying Spring by Algaworks courses recently and today I came across a problem, is the following:

I have a form that shows me a list of employees, and as it was passed in the course, I also have a form for registration and editing that are the same. Dai I thought of making a modal that would serve as registration and editing form, so I searched how to do this and I ended up finding, the modal is working 90%, the validations are being made in JQuery, ta registering, showing success message and all, but, here comes the problem.

I don’t know if you know this way of validating the server with Spring, the course taught us to do so:

@RequestMapping(value="/novo", method = RequestMethod.POST)
public String salva(@Validated Funcionario funcionario, Errors errors, RedirectAttributes attributes){      
    if (errors.hasErrors()) {
        return "redirect:/saboia/funcionarios";
    }else{          
        funcionarios.save(funcionario);         
        attributes.addFlashAttribute("mensagem","Funcionario Salvo com Sucesso!");          
        return "redirect:/saboia/funcionarios";
    }
}

That is, if the form has errors as shown there in the first if, then I would redirect to the specified controller, however, the redirect would end the registration request, so that all data would be lost.

As the registration form is no longer a specific page as it was before so I could give a redirect so I was a little lost, How to make the validations performed on the server reach my modal?