Difference between resolvers and controllers

[louis1999]

Hello,

I'm new to spring boot and graphql so my question might be dump but I didn't see any answer on internet so i'm asking it here.
What's the difference between the graphql resolvers and the sring boot Controller ?
Most of the tutorials I see on google and youtube are using these specific ways (some are also using services but it seems less popular) of mapping a query to an execution that will retrieve data from a repository.
I can't find are the differences, do they have the same purpose or maybe I am misunderdanting something ? What is the best way to make that schema mapping between query and execution ?
I would be glad to have your thoughts about this, if my question isn't clear, tell me how i can explain it better.

Thanks for your help