The difference between the action of JSF and ActionListener

Event	test	parameter	event Generation	page Jump
Action	has	no arguments, no incoming control, return value	generates an event when the Ammonium button is clicked. Submit Form	back to page---jump from profile
ActionListener	have	Pass in the current control, no return value	generates an event when the Ammonium button is clicked. Submit Form	Return to this page
valuechangelistener	There are	passed in the current control, no return value	Do not submit form (you need to specify its on change/on click= "Submit" to submit the form automatically	return to this page

Action (): deals with business logic. In fact, JSF automatically generates a "preset ActionListener" to handle the event and determines the page jump based on its return value. The fifth-stage invoke application execution affects navigation between pages (navigation), mainly handles some business logic and returns several business logic results (string types), and the JSF navigation system will select the appropriate next page based on this. The form will be submitted.

ActionListener (Actionevente): Handles the "listener events" of components on the page, and the fifth-stage call to app execution does not affect navigation. The main operation of the components within the current page, or some changes in the business model, or modify the Backingbean ( Managed beans, etc., and does not appear in the jump between pages. The form will be submitted.

Valuechangelistener (valuechangeeventevent): "Listener event" that handles changes in component values on the page, third-stage validation request Value "execution

ActionListener (Event listener): is used to resolve events that affect only the user interface.

specifically, the beans's form data is called before it is loaded and triggered for validation           with immediate= "true" to indicate that this behavior does not trigger validation   ,   after the listener is invoked, the form is re-displayed, do not apply navigation rules, do not redirect pages

ACT ion : A control that is subordinate to a button, hyperlink, and graphic map to automatically submit the corresponding form

Valuechangelistener: Controls that are part of a radio box, combo box, list box, check box, text box, and so on, need to beonclick= "submit ()" or on change= Submit form by "submit ()"