Wicket WARNING対処 AjaxEventBehavior: Since version 6.0.0 Wicket uses JavaScript event registration so there is no need of the leading 'on' in the event name 'onblur'. Please use just 'blur'.

add(new AjaxFormValidatingBehavior("onblur", Duration.ONE_SECOND));

WARN  [2016-06-05 19:32:49,673] org.apache.wicket.ajax.AjaxEventBehavior: 
Since version 6.0.0 Wicket uses JavaScript event registration so there is no need of the leading 'on' in the event name 'onblur'. 
Please use just 'blur'.
Wicket 8.x won't manipulate the provided event names so the leading 'on' may break your application.

add(new AjaxFormValidatingBehavior("blur", Duration.ONE_SECOND));