Library for interacting with Fess?

(from github.com/jhult)
I am planning to use Fess to index files and then run search queries. Is there a library (such as a Maven artifact) I can use to do this? Or should I use a JSON parser library with the Fess API to accomplish this?

(from github.com/marevol)
Fess does not provide a client library to parse JSON for Fess API.

should I use a JSON parser library with the Fess API to accomplish this?

Yes.