Add a new servlet or a new action to an existing one to process requests.

Developing a feature for a project in typically follows the MVC (Model 2) architecture . This structure separates your business logic from your user interface, making the application easier to maintain and expand.

To develop a new feature—such as a "User Profile" page for the book's signature application—follow these steps: 1. Update the Model Create or update a JavaBean to represent your data.

: Update your JDBC or ProductDB class to handle new SQL queries, such as retrieving a user's order history from the MySQL database. 2. Create the Controller (Servlet)

: Inside the doGet or doPost method, use the Model classes to fetch or save data.

: Use the @WebServlet annotation or the web.xml file to map a URL pattern like /userProfile .