In the previous chapters, we saw how to map a particular URL to a controller method; for example, if the URL entered was
http://localhost:8080/webstore/products, we mapped that request to the
list method of
ProductController and listed all the product information on the web page.
What if we want to list only a subset of the products based on category, for instance, we want to display only the products that fall under the category of laptops if the user entered the URL
http://localhost:8080/webstore/products/laptop? Similarly, what if the URL is
http://localhost:8080/webstore/products/tablet and we would like to show only tablets on the web page?
One way to do this is to have a separate request mapping method in the controller ...