In Spring Boot, to create a custom constraint annotation, you should create an annotation interface and a corresponding _____ class to implement the validation logic.

To create a custom constraint annotation in Spring Boot, you need to create an annotation interface and a corresponding ConstraintValidator class to implement the validation logic. The ConstraintValidator interface allows you to define custom validation rules for your annotation, making it a crucial part of custom validation. The other options are not standard components used for creating custom constraint annotations.