Hibernate日期操作

Question

我在DB2中使用hibernate并遇到以下问题。表/实体Customer包含字段first_name，last_name，birthday（java.util.Date）。我需要写一个查询，它将检索所有在接下来的四天有生日的客户。问题是，对于一些客户来说，出生年份是未知的，因此在数据库中设置为9999，因此我不能只对where子句进行简单的检查（因为9999年）。

Answer 1

使用简单的hql查询

from Customer as user where month(user.birthday) = month(current_date()+4 days) and day(user.birthday) = day(current_date()+4 days)
union all
from Customer as user where month(user.birthday) = month(current_date()+3 days) and day(user.birthday) = day(current_date()+3 days)
union all
from Customer as user where month(user.birthday) = month(current_date()+2 days) and day(user.birthday) = day(current_date()+2 days)
union all
from Customer as user where month(user.birthday) = month(current_date()+1 day) and day(user.birthday) = day(current_date()+1 day)