Hi I have a problem with serialization enum using kotlin, spring, jackson. I made a stack overflow question so i wont copy paste it, maybe someone of you will know how to solve it. https://stackoverflow.com/questions/72700370/spring-boot-serialize-kotlin-enum-by-custom-property.

Probably not Kotlin related but I think RequestParam does not use Jackson but Spring converters instead. If you use RequestBody then Jackson is used

Ohhh, that might be that case. And is it possible to use set it up to use jackson?

I don't think it would make any sense because request parameters and actual body are different things

Also is there a Spring documentation that explains how it works in detail?

For a regular conversion, Spring is able to initialize your param without any helping converter. In your case, a custom conversion is needed from

name

to

NAME

and from

registrationNumber

to

REGISTRATION_NUMBER

. So, create a class annotated with

@Component

that implements Converter interface. You just have to implement the required method

convert

from source object to target. Also, remove the

@RequestParam

annotation from the endpoint.