Refresh DIV after sending model from Spring controller

You see, I am working with spring and thymeleaf and I am just a beginner in this subject; I have the following tree which contains some modules and beside it is a form with which you can create and edit the modules. my problem is that when I want to edit a module I want to fill in the fields of the form when I click on one of the elements of tree ; I have the following ajax with which I sent my controller the id of the module to perform the search in the database:

function rellenarModulo() {
    $.ajax({
       type: "POST",
       url: "/creadorRellenar",
       data: {
            idModulo: idNodo
       },
       success: function(data) {}
    });    
}

and in my controller the following:

    @RequestMapping(value = "/creadorRellenar", method = RequestMethod.POST)
    public String getModulo(@ModelAttribute Modulo mod, Model model) {
    int idModuloSeleccionado = mod.getIdModulo();
    Modulo modulo = adminService.getModuloById(idModuloSeleccionado).get(0);
    System.out.println(modulo.getNombreModulo()+" 
    "+modulo.getDescripcionModulo());
    model.addAttribute("moduloss",modulo);
    return "creador";
}

The data is sent correctly to the view; but nevertheless they do not show on the screen; I could only check it in the following way: