[spring][오류]com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class jpabook.jpashop.api.XXXXXXXX$YYYYYYY and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAI..

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class jpabook.jpashop.api.XXXXXXXX$YYYYYYY and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.ArrayList[0])

 

클래스에 Getter가 없어서 나는 오류