Spring Data JPA-如何仅使用月和日从Date列中获取数据? [英] Spring Data JPA - How can I fetch data from a Date column using only month and day?

问题描述

我有一个使用mysql的简单Spring Data JPA项目，我需要获取与日和月匹配的所有寄存器.我需要过滤的列是Datetime类型.

I have a simple Spring Data JPA project working with mysql and I need to fetch all registers that match the day and month. The column I need to filter is type Datetime.

1935-12-08 00:00:00

如果我想在数据库级别执行此操作，它将正常工作:

If I want to do this in a db level it works fine:

SELECT * FROM my_database.event where event_date LIKE '%-12-08%';

它将日期视为字符串.现在，我需要在存储库中执行此操作，但似乎没有任何效果.我尝试了基本的方法:

It treats the date as a string. Now I need to do this in my repository yet nothing seems to work. I tried the basic one:

List<Event> findByEventDateLike(
        @Param("eventDate") Date eventDate);

但是它说它返回一个非法的参数异常，因为它是一个Date对象.我尝试了其他组合，但是显然jpa的spring数据无法将日期与部分信息进行比较.

but it says it returns an illegal argument exception since it is a Date object. I tried other combinations but apparently spring data jpa can't compare dates with partial information.

注意:为了保持整洁，我尝试避免使用@Query句子，但是如果这是唯一的解决方法，那么这是一个有效的答案.

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.

我该怎么办?

推荐答案

使用nativeQuery在数据库中模拟查询.

Use nativeQuery to emulate the query in the Database.

@Query(value = "SELECT * FROM events WHERE event_date Like %?1%", nativeQuery = true)
List<Match> findByMatchMonthAndMatchDay(@Param ("eventDate") String eventDate);

数据库负责LIKE子句的日期/字符串之间的转换.

The DB takes care of the conversion between Date/String for the LIKE clause.

将参数传递为"-month-day"(例如:-12-08)将返回在日期字段中带有该字符串的事件的集合.

Passing the param as "-month-day" (e.g.: -12-08) will return a collection of events with that string in the date field.

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