Time for action – showing products based on category

Let's add a category view to the products page using the path variable:

1. Open the ProductRepository interface and add one more method declaration on its getProductsByCategory method:

   List<Product> getProductsByCategory(String category);

2. Open the implementation class InMemoryProductRepository and add an implementation for the previously declared method as follows:

   public List<Product> getProductsByCategory(String category) {
     List<Product> productsByCategory = new ArrayList<Product>();
       
     for(Product product: listOfProducts) {
       if(category.equalsIgnoreCase(product.getCategory())){
         productsByCategory.add(product);
       }
     }
     
     return productsByCategory;
   }

3. Similarly, open the ProductService interface and add one more method declaration on its getProductsByCategory method:

   List<Product> getProductsByCategory(String category);

4. Open the service implementation class ProductServiceImpl and add an implementation...