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@GetMapping(value = "/")
public String interfazVender(Model model, HttpServletRequest request) {
model.addAttribute("producto", new Producto());
float total = 0;
ArrayList<ProductoParaVender> carrito = this.obtenerCarrito(request);
for (ProductoParaVender p: carrito) total += p.getTotal();
model.addAttribute("total", total);
return "vender/vender";
}
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