Minimal sample application: https://github.com/fangzhengjin/spring-framework-issues-34386

Start the program and execute the request below.

Observe the input arguments to the com.example.demo.IQueryController#test method.

curl -X POST 'localhost:8080/test' -H 'Content-Type: application/json' -d '{"data":{"name":"test"}}'

This problem occurs when the generic names declared by IQueryController and ICrudController are inconsistent in the example project.

Expected behavior:

public interface IQueryController<Entity>

public interface ICrudController<Entity> extends IQueryController<Entity>

Unexpected behavior:

public interface IQueryController<QueryParam>

public interface ICrudController<Entity> extends IQueryController<Entity>

6.2.x

6.1.x