There is a standing project that serializes and deserializes JSON at http://jehiah.com/projects/cfjson/ that is a great solution. I built a missing piece in it for deserializing the query because he was missing that piece. He didn’t add it in yet. Another fine work is done by the creator of Fusebuilder. I don’t think he has released it to the public yet though. His version makes the Query on Java look more like the structure inside CF.
The url is down, any other resources for that?