ajax post call don't show page

I have this code, but this doesn't redirect well to the page results.

This is my code html:

<script type="text/javascript">
    function cargaDatos2(){ 
        var param1= $('#selector2').val();
        var param2= $('#selector3').val();
        //Llamada a la funcion que carga los datos en la base de datos.
        $.ajax({
            type: "POST",
            data: {"param1" : param1, "param2" : param2},
            url: "http://localhost:8080/prueba",
            success: function(data){
                alert("Ejecutado correctamente");
            },
            error: function (data){
                alert("Error en la ejecucion");
            }
        });

    }
</script>    

And this is my code in Java, Spring:

  @RequestMapping(value="/prueba", method=RequestMethod.POST)
  public String checkPersonInfo(@RequestParam (required=false) String param1, @RequestParam (required=false) String param2) {

System.out.printf("1-el nombre seleccionado es: %s \n", param1);
System.out.printf("2-el nombre seleccionado es: %s \n", param2);
return "redirect:/results";

}

why doesn't it redirect? this is my output in console browser:

prueba POST 302 Found application/x-www-form-urlencoded jquery.min.js:19

results GET 200 OK text/html http://localhost:8080/prueba Redirect

What is the problem?