Introduction to the Spring IoC container and beans

最新推荐文章于 2021-09-23 21:45:36 发布

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本文介绍了Spring框架中IOC容器的基础概念，包括BeanFactory和ApplicationContext接口的作用及其实现方式，并解释了Bean的概念及其在Spring IOC容器中的管理方式。

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什么是IOC Container

The org.springframework.beans and org.springframework.context packages are the basis for Spring Framework’s IoC container. The BeanFactory interface provides an advanced configuration mechanism capable of managing any type of object. ApplicationContext is a sub-interface of BeanFactory. It adds easier integration with Spring’s AOP features; message resource handling (for use in internationalization), event publication; and application-layer specific contexts such as the WebApplicationContext for use in web applications

IOC Container的实例

Several implementations of the ApplicationContext interface are supplied out-of-the-box with Spring. In standalone applications it is common to create an instance of ClassPathXmlApplicationContext or FileSystemXmlApplicationContext.

什么是Bean

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 otherwise managed by a Spring IoC container