I have found RESTEasy (and likely any JAX-RS implementation) to be very nice for creating simple services. With various annotations and static typing to automa

I have found RESTEasy (and likely any JAX-RS implementation) to be very nice for creating simple services. With various annotations and static typing to automatically convert various parameters into function arguments, it's easier than Sinatra on Ruby. (Of course, there's a bit of config overhead to hook it into a web.xml, but it's not terrible)