[英]Spring Data JPA - How can I fetch data from a Date column using only month and day?
I have a simple Spring Data JPA project working with mysql and I need to fetch all registers that match the day and month. 我有一个简单的Spring Data JPA项目使用mysql,我需要获取所有匹配日期和月份的寄存器。 The column I need to filter is type Datetime.
我需要过滤的列是Datetime类型。
1935-12-08 00:00:00
If I want to do this in a db level it works fine: 如果我想在数据库级别执行此操作,它可以正常工作:
SELECT * FROM my_database.event where event_date LIKE '%-12-08%';
It treats the date as a string. 它将日期视为字符串。 Now I need to do this in my repository yet nothing seems to work.
现在我需要在我的存储库中执行此操作,但似乎没有任何工作。 I tried the basic one:
我试过基本的:
List<Event> findByEventDateLike(
@Param("eventDate") Date eventDate);
but it says it returns an illegal argument exception since it is a Date object. 但它说它返回一个非法的参数异常,因为它是一个Date对象。 I tried other combinations but apparently spring data jpa can't compare dates with partial information.
我尝试了其他组合,但显然弹簧数据jpa无法将日期与部分信息进行比较。
NOTE: To keep it clean I'm trying to avoid @Query sentences but if it is the only way to go, it is a valid answer. 注意:为了保持干净我试图避免@Query句子,但如果这是唯一的方法,这是一个有效的答案。
How can I do it? 我该怎么做?
If your JPA provider is Hibernate then you can use year
and month
(and other funcs ) in your JPQL (HQL) query, for example like this: 如果您的JPA提供程序是Hibernate,那么您可以在JPQL(HQL)查询中使用
year
和month
(以及其他函数 ),例如:
@Query("select e from Event e where year(e.eventDate) = ?1 and month(e.eventDate) = ?2")
List<Entity> getByYearAndMonth(int year, int month);
The code below works for ZonedDateTime (startDate), don't have an opportunity to test against DateTime right now: 下面的代码适用于ZonedDateTime(startDate),现在没有机会对DateTime进行测试:
@Query("SELECT b FROM Box b " +
"WHERE EXTRACT (day FROM b.startDate) = :dayOfMonth AND EXTRACT (month FROM b.startDate) = :month")
List<Box> findBoxWithParticularDayAndMonth(@Param("dayOfMonth") Integer dayOfMonth, @Param("month") Integer month);
Usage: 用法:
List<Box> boxes = boxRepo.findBoxWithParticularDayAndMonth(22, 5);
Use nativeQuery to emulate the query in the Database. 使用nativeQuery模拟数据库中的查询。
@Query(value = "SELECT * FROM events WHERE event_date Like %?1%", nativeQuery = true)
List<Match> findByMatchMonthAndMatchDay(@Param ("eventDate") String eventDate);
The DB takes care of the conversion between Date/String for the LIKE clause. DB负责LIKE子句的Date / String之间的转换。
Passing the param as "-month-day" (eg: -12-08) will return a collection of events with that string in the date field. 将参数传递为“-month-day”(例如:-12-08)将在日期字段中返回带有该字符串的事件集合。
Java: Date to String Convert java.util.Date to String Java:Date to String 将java.util.Date转换为String
@Query("select e from Event e where e.eventDate like %:eventDate%")
List<Entity> findByEventDateLike(@Param("eventDate")String eventDate);
for me the easy way is parse Date to String but I found another solution you could be try 对我来说,简单的方法是解析日期到字符串,但我找到了另一种解决方案,你可以尝试
%Like% Query in spring JpaRepository https://docs.spring.io/spring-data/jpa/docs/current/reference/html/ %Like%JaseRepository中的%Query https://docs.spring.io/spring-data/jpa/docs/current/reference/html/
Containing 含
findByFirstnameContaining findByFirstnameContaining
… where x.firstname like ?1 (parameter bound wrapped in %) ...其中x.firstname喜欢?1(参数绑定包装在%)
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