Of course, the difference is that the Golang code isn't using "some libraries", but the standard library. Well, except for this one, which is also using some custom handlers for gzip and such.
Actually I think that this example written in Java8 with lambda expressions would be more impressive.
Except it isn't: http://go-lang.cat-v.org/pure-go-libs
I'm gonna drop Jetty and Java altogether in favor of AeroNotix/wedge!