@RequestMapping("/{category}")
    public String getProductsByCategory(@PathVariable("category") String productCategory, Model model) {
        model.addAttribute("products", productService.getProductsByCategory(productCategory));
        return "products";
    }

    @RequestMapping("/{manufacturer}")
    public String getProductsByManufacturer(@PathVariable("manufacturer") String productManufacturer, Model model) {
        model.addAttribute("products", productService.getProductsByManufacturer(productManufacturer));
        return "products";
    }