Spring源码学习--HierarchicalBeanFactory接口

待我称王封你为后i 2022-04-13 05:26 169阅读 0赞

# Spring源码学习--HierarchicalBeanFactory接口 #

2018年06月26日 18:32:39 [可乐丶][Link 1] 阅读数：154更多

个人分类： [web常见框架学习][web]

所属专栏： [Spring使用和源码学习系列][Spring]

继上一篇**Spring源码学习–BeanFactory接口**

> [https://blog.csdn.net/u013412772/article/details/80755463][https_blog.csdn.net_u013412772_article_details_80755463]

### 文章引用: ###

> 1 [https://www.cnblogs.com/leftthen/p/5261837.html][https_www.cnblogs.com_leftthen_p_5261837.html]   
> 2 [https://www.cnblogs.com/zrtqsk/p/4028453.html][https_www.cnblogs.com_zrtqsk_p_4028453.html]

![这里写图片描述][70]

`HierarchicalBeanFactory` 提供父容器的访问功能.至于父容器的设置,需要找`ConfigurableBeanFactory`的`setParentBeanFactory`(接口把设置跟获取给拆开了!).

--------------------

HierarchicalBeanFactory源码具体：

1、第一个方法返回本Bean工厂的父工厂。这个方法实现了工厂的分层。

2、第二个方法判断本地工厂是否包含这个Bean（忽略其他所有父工厂）。这也是分层思想的体现。

总结：这个工厂接口非常简单，实现了Bean工厂的分层。这个工厂接口也是继承自BeanFacotory，也是一个二级接口，相对于父接口，它只扩展了一个重要的功能——工厂分层。

/**
     * Sub-interface implemented by bean factories that can be part
     * of a hierarchy.
     *
     * <p>The corresponding {@code setParentBeanFactory} method for bean
     * factories that allow setting the parent in a configurable
     * fashion can be found in the ConfigurableBeanFactory interface.
     *
     * @author Rod Johnson
     * @author Juergen Hoeller
     * @since 07.07.2003
     * @see org.springframework.beans.factory.config.ConfigurableBeanFactory#setParentBeanFactory
     */
    public interface HierarchicalBeanFactory extends BeanFactory {
    
        /**
         * Return the parent bean factory, or {@code null} if there is none.
         */
        // //  返回本Bean工厂的父工厂
        BeanFactory getParentBeanFactory();
    
        /**
         * Return whether the local bean factory contains a bean of the given name,
         * ignoring beans defined in ancestor contexts.
         * <p>This is an alternative to {@code containsBean}, ignoring a bean
         * of the given name from an ancestor bean factory.
         * @param name the name of the bean to query
         * @return whether a bean with the given name is defined in the local factory
         * @see BeanFactory#containsBean
         */
         //  本地工厂(容器)是否包含这个Bean
        boolean containsLocalBean(String name);
    
    }

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[https_blog.csdn.net_u013412772_article_details_80755463]: https://blog.csdn.net/u013412772/article/details/80755463
[https_www.cnblogs.com_leftthen_p_5261837.html]: https://www.cnblogs.com/leftthen/p/5261837.html
[https_www.cnblogs.com_zrtqsk_p_4028453.html]: https://www.cnblogs.com/zrtqsk/p/4028453.html
[70]: /images/20220413/12cc0f16fc5d44cc822aa416bfe2ef04.png