Bean是什么

https://docs.spring.io/spring-framework/docs/current/reference/html/core.html#beans-definition

In Spring, the objects that form the backbone of your application and that are managed by the Spring IoC container are called beans. A bean is an object that is instantiated, assembled, and managed by a Spring IoC container. Otherwise, a bean is simply one of many objects in your application. Beans, and the dependencies among them, are reflected in the configuration metadata used by a container.

在 Spring 中，构成应用程序主干并由 Spring IoC 容器管理的对象称为 bean。

bean 是由 Spring IoC 容器实例化、组装和管理的对象。

否则，bean 只是应用程序中众多对象中的一个。

Bean 以及它们之间的依赖关系反映在容器使用的配置元数据中。