How to execute javascript method from server side?

问题

in primefaces there's the RequestContext class which add the ability to invoke javascript method from server side :

RequestContext context = RequestContext.getCurrentInstance();          
        //execute javascript oncomplete  
        context.execute("PrimeFaces.info('Hello from the Backing Bean');"); 

i was wondering if it's possible to accomplish that with jsf 2 without using primefaces, please advise.

回答1:

The easiest but also hackiest way would be to set a property which represents the content of a <h:outputScript> and ajax-update it by adding its client ID to PartialViewContext#getRenderIds().

So, given a

<h:panelGroup id="script"><h:outputScript>#{bean.script}</h:outputScript></h:panelGroup>

you can ajax-update it with

script = "alert('peek-a-boo')";
FacesContext.getCurrentInstance().getPartialViewContext().getRenderIds().add("script");

来源：https://stackoverflow.com/questions/17711409/how-to-execute-javascript-method-from-server-side