Is it possible to change the output of @NotNull from "text/plain" to "application/json" in JAX-RS?

Question

Java

Let's say we have a JAX-RS REST service with the following method:

The member parameter is validated against null using the NotNull annotation . If you make a POST request with an empty body, the server will return a 400 response, which is logical, but in the response body it writes automatically generated additional error information in text/plain format.

Actually the question is, is it possible to change the format of the generated information to JSON and how to do it? Why does it basically return text/plain by default, and not what is specified in the parameters of the Produces annotation to the method?

Answer 1

Here is what is written in the encyclopedia of young marmots