问题描述

我有一个包含 java.time.LocalDateTime 类型属性的类.

I've got a class which contains an atttribute of java.time.LocalDateTime type.

public class MyClass{
    // ...
    private LocalDateTime fecha;
    // ...
}

我正在使用 Spring Data 存储库.我想要完成的是根据日期查询实体:

I'm using Spring Data repositories. What I want to accomplish is to query entities according to a date:

@Service
public interface IRepository extends CrudRepository<MyClass, UUID> {
    // ...
    public void deleteByFecha(LocalDate fecha);
    // ...
}

但这不起作用，因为抛出了异常:

But this does not work, as an exception is thrown:

org.springframework.dao.InvalidDataAccessApiUsageException: 参数值 [2016-10-05] 与预期类型不匹配 [java.time.LocalDateTime (n/a)];

org.springframework.dao.InvalidDataAccessApiUsageException: Parameter value [2016-10-05] did not match expected type [java.time.LocalDateTime (n/a)];

所以问题是如何通过 fecha 查询数据库中的 MyClass 但使用 LocalDate?

So the question is how can I query MyClass in database by fecha but with a LocalDate?

编辑万一有人遇到同样的问题，我想出了一个解决方案:修改存储库的方法，使其如下所示:

EDIT Just in case somebody faces the same issue, I've come up with one solution: modify the Repository's method so that it looks as follows:

import org.springframework.transaction.annotation.Transactional;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
// ...

@Service
public interface IRepository extends CrudRepository<MyClass, UUID> {

    @Transactional
    @Modifying
    @Query("DELETE FROM MyClass mtc WHERE YEAR(mtc.fecha)=?1 AND MONTH(mtc.fecha)=?2 AND DAY(mtc.fecha)=?3")
    public void deleteByFecha(Integer year, Integer month, Integer day);

}

推荐答案

试试这个(未测试):

public interface IRepository extends CrudRepository<MyClass, UUID> {
    // ...
    default void delByFecha(LocalDate fecha) {

        deleteByFechaBetween(fecha.atStartOfDay(), fecha.plusDays(1).atStartOfDay());

    }

    void deleteByFechaBetween(LocalDateTime from, LocalDateTime to);
    // ...
}

这篇关于如何使用 LocalDate 查询 LocalDateTime?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！