链接：https://pan.baidu.com/s/14Q3UzdLTUkm095TRWnJEAA 

提取码：h3qi 

 

1、AnnotationConfigApplicationContext类AnnotationConfigApplicationContext(Class<?>... annotatedClasses)

 

 

2、进入refresh()即AbstractApplicationContext类的refresh()

 

 

 

3、找到finishBeanFactoryInitialization(beanFactory);

 

4、进入finishBeanFactoryInitialization(beanFactory)即AbstractApplicationContext类的finishBeanFactoryInitialization(ConfigurableListableBeanFactory beanFactory)

 

 

 

5、找到beanFactory.preInstantiateSingletons()

 

6、进入beanFactory.preInstantiateSingletons()，即DefaultListableBeanFactory类的preInstantiateSingletons()

 

 

 

 

 

7、找到getBean(beanName);

 

 

8、进入getBean(beanName)，即AbstractBeanFactory类的getBean(String name)

 

 

 

 

 

 

 

9、进入doGetBean(name, null, null, false)，即AbstractBeanFactory类的doGetBean(final String name, @Nullable final Class<T> requiredType,@Nullable final Object[] args, boolean typeCheckOnly)

 

 

10、找到return createBean(beanName, mbd, args);

 

 

 

 

 

 

11、进入createBean(beanName, mbd, args)，即AbstractAutowireCapableBeanFactory类的createBean(String beanName, RootBeanDefinition mbd, @Nullable Object[] args)

 

 

12、找到Object beanInstance = doCreateBean(beanName, mbdToUse, args);