Not sure what you're after, but the ExternalContext#dispatch()
does only a forward, not a redirect. You'd like to use ExternalContext#redirect()
instead.
externalContext.redirect("foo.xhtml");
or even external (which is not possible with dispatch)
externalContext.redirect("http://stackoverflow.com");
You'd normally like to do this in bean's action method.
Since you mentioned JavaScript in the comments, here's how you could redirect using JS:
window.location = "foo.xhtml";
// Or
window.location = "http://stackoverflow.com";
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