所以答案是“不，存储库中的默认方法不会命中其他方法的缓存”

@Test
    @Transactional
    public void testContactTypeCaching() {
        System.out.println("first call to findIdByCode");
        contactTypeRepo.findIdByCode("MOBILE");
        System.out.println("second call to findIdByCode");
        contactTypeRepo.findIdByCode("MOBILE");
        System.out.println("third call to findIdByCode");
        contactTypeRepo.findIdByCode("MOBILE");

        System.out.println("first call to getReferenceByCodeRequired");
        contactTypeRepo.getReferenceByCodeRequired("MOBILE");
        System.out.println("second call to getReferenceByCodeRequired");
        contactTypeRepo.getReferenceByCodeRequired("MOBILE");
        System.out.println("third call to getReferenceByCodeRequired");
        contactTypeRepo.getReferenceByCodeRequired("MOBILE");
    }

输出：

first call to findIdByCode
Hibernate: 
    select
        contacttyp0_.ct_id as col_0_0_ 
    from
        contact_types contacttyp0_ 
    where
        contacttyp0_.code=?
second call to findIdByCode
third call to findIdByCode

first call to getReferenceByCodeRequired
Hibernate: 
    select
        contacttyp0_.ct_id as col_0_0_ 
    from
        contact_types contacttyp0_ 
    where
        contacttyp0_.code=?
second call to getReferenceByCodeRequired
Hibernate: 
    select
        contacttyp0_.ct_id as col_0_0_ 
    from
        contact_types contacttyp0_ 
    where
        contacttyp0_.code=?
third call to getReferenceByCodeRequired
Hibernate: 
    select
        contacttyp0_.ct_id as col_0_0_ 
    from
        contact_types contacttyp0_ 
    where
        contacttyp0_.code=?