Design Patterns and Best Practices in Java

A more contemporary MVC implementation

For a rich internet application, the MVC implementation may look more like this diagram:

The core idea is that the model and view are completely independent. The controller receives communication from both the view and model and updates them based on the actions triggered. For example, when the user clicks a button on submit new employee record, the controller receives this request and in turn updates the model. Similarly, when a model gets updated, it notifies the controller, which then updates the view to reflect the correct model state.