In general you can decide whether a champion is good at jungling by looking at the following factors:
1) How good they are at clearing camps? 2) How well can they sustain when clearing camps? 3) How well can they invade a jungle? 4) How well can they defend against a counterjungle? 5) How well can they gank?
There's a reason that the top junglers are people like Xin Zhao, Vi, Jarvan. They have decently fast jungle clearance, usually have some ability to sustain themselves or reduce damage taken, relatively good duelists, and have decent ganks.