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dosubot avatar dosubot commented on June 16, 2024 3

你好,@pengbiaobeyond!很高兴再次看到你的问题 😊

在Apollo项目中,我们并没有使用mapper.xml文件来实现repository接口。相反,我们使用了Spring Data JPA来实现这些接口。

Spring Data JPA允许我们通过扩展其特定的子接口(如PagingAndSortingRepository)来定义repository接口,这个子接口提供了通用的CRUD操作方法以及分页和排序功能。这些接口的实际实现是由Spring Data JPA在运行时提供的。

在我们提供的AuditRepository接口中,我们使用@Query注解来定义自定义查询方法。这个注解允许我们直接指定JPQL(Java Persistence Query Language)查询。我们使用@Param注解来命名方法参数,这些参数然后在JPQL查询字符串中使用。这种方法消除了需要单独的mapper.xml文件来定义SQL或JPQL查询的需要,因为查询是直接在repository接口中使用注解定义的。

支持这种实现的关键点包括:

  • PagingAndSortingRepository接口提供了基本的CRUD和分页/排序操作。
  • 使用@Query注解在接口中直接定义自定义查询。
  • @Param注解指定了在自定义查询中使用的参数的名称。

这种方法简化了repository层,减少了样板代码,并避免了需要单独的XML文件来定义查询,充分利用了Spring Data JPA和其与JPA规范的集成的能力。

你可以在以下链接中查看相关的代码:

希望这个解答能帮助你理解Apollo项目中repository接口是如何实现的。如果你还有其他问题,欢迎继续提问。

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pengbiaobeyond avatar pengbiaobeyond commented on June 16, 2024

好的,谢谢

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stale avatar stale commented on June 16, 2024

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

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