How to create JSF form with AJAX data validation

Question

I\'m working on a JSF form prototype for inserting data into database table using AJAX data validation This is the JSF page:

Answer 1

Just add listener in your tag h:inputText:

So you can check the entered value on the server side. When a user tabs out of the input field, JSF makes an ajax-call to the server and runs the name input component through the execute portion of the life cycle. This means that JSF will invoke the name input's value-change listener specified in attribute valueChangeListener during the validations process phase of the life cycle.

And I would suggest to implement this method:

public void validateSessionid(ValueChangeEvent e) {
    UIInput nameInput = e.getComponent()
    String sessionid = nameInput.getValue()

    //do SQL query
}

After the ajax-call returns JSF renders the h:outputText id="sessionidvalidate".