如何按特定月份获取已createAt 参数类型Date 的所有实体？

Question

I have a class that has a parameter of type Date.

class MyEntity { 
    @CreatedDate
    @Column(nullable = false, updatable = false)
    private Date createdAt;
}

How can I retrieve all those entities where the createdAt is ie: in May? Do I need to use @Query or is there a different way to perform it?

Answer 1

Do I need to use @Query?

Yes )

How can I retrieve all those entities where the createdAt is ie: in May?

If your JPA provider is Hibernate (I'm sure that it's so), you can use month() and other useful HQL functions in your queries:

@Query("select e from MyEntry e where month(e.createdAt) = ?1")
List<MyEntry> getAllByMonth(int month);