浅析Spring IoC源码（八）了解BeanFactoryAware

这一节我们还是先了解一下BeanFactoryAware这个接口，之所以说只是了解一下，还是希望等到分析refresh()的时候有个更好的理解吧

照旧先上源代码：

官方解释：实现这个接口的bean其实是希望知道自己属于哪一个beanfactory

言简意赅，不需要做多解释，先实现一下自己，看看他的基本功能吧，看代码：

MyBeanFactoryAware.java

bean-factory-aware.xml

1. package org.study.spring.beanfactoryaware;  
2.   
3. import org.springframework.beans.BeansException;  
4. import org.springframework.beans.factory.BeanFactory;  
5. import org.springframework.beans.factory.BeanFactoryAware;  
6.   
7. public class MyBeanFactoryAware implements BeanFactoryAware{  
8.       
9.   
10. public void setBeanFactory(BeanFactory beanFactory) throws BeansException {  
11. "I belong to ："+beanFactory);  
12.     }  
13.   
14. }

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"  
4. xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"  
5. xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jee="http://www.springframework.org/schema/jee"  
6. xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
7.         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd  
8.         http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd  
9.         http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd  
10. >  
11.    
12.       
13.             
14. <bean id="mybeanFactoryAware" class="org.study.spring.beanfactoryaware.MyBeanFactoryAware"></bean>  
15.   
16. </beans>

MyBeanFactoryAwareTest.java

1. package org.study.spring.beanfactoryaware;  
2.   
3. import org.junit.Test;  
4. import org.springframework.context.ApplicationContext;  
5. import org.springframework.context.support.ClassPathXmlApplicationContext;  
6.   
7. public class MyBeanFactoryAwareTest{  
8.       
9.       
10. @Test  
11. public void test2() throws Exception{  
12. new ClassPathXmlApplicationContext("bean-factory-aware.xml");  
13. "mybeanFactoryAware",MyBeanFactoryAware.class);  
14.            
15.     }  
16.   
17. }

运行结果：

的确，根据我们上次分析的源代码，的确属于DefaultListableBeanFactory

换个说法，我们目前不知道这个接口更多真实的意义，如果不分析其他的部分，我们就知道可以在实现BeanFactoryAware的bean中获取beanfactory,也就是获取上下文，其他的不知道暂时有什么用处，也许分析refresh就会有理解了吧~