Difference between Filter and Listener in Servlet (Java EE)

Question

There are Filters and Listeners functionality in Servlet. I want to know exact difference between Filter and Listener.

Answer 1

While you can modify the current event object within a listener, you cannot halt the execution of the current event handler in a listener. You also cannot clear the event queue from within a listener. Besides the imposed differences in capabilities, they are also intended for different purposes. Listeners tend to focus on interacton between the event handler and the model, while filters tend to focus on interaction between the event handler and the controller.

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