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dosubot avatar dosubot commented on May 28, 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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from apollo.

pengbiaobeyond avatar pengbiaobeyond commented on May 28, 2024

好的,谢谢

from apollo.

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