MongoDB是一种开源的文档式数据库系统，它使用类似于JSON的格式来存储和表示数据。Java是一种流行的高级编程语言，它被广泛用于开发Web应用程序、企业应用程序和移动应用程序等。在许多应用程序中，需要从MongoDB数据库中检索数据，并将其与其他集合或数据库中的数据进行关联。这就需要使用多联查询。什么是MongoDB多联查询&#x...

问答 2016-02-21 来自：开发者社区

比如在mongodb中查找 `{"geom.coordinates":{$within:{$polygon:[[116.342059,39.973675],[116.380778,39.973675],[116.380778,39.943997],[116.342059,39.943997]]}}} `能够查到这四个点坐标内的点，那如何在其他语言中实现呢？比如说java。 spring 整合.....

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更新时间 2023-11-08 16:54:52

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