Spring---Bean生命周期

/**
     *  Spring Bean生命周期
     *      加载BeanDefinition ->
     *
     *      实例化Bean createBeanInstance ->
     *
     *      初始化Bean populateBean ,initializeBean
     *          initializeBean{
     *              invokeAwareMethods(beanName, bean);
     *
     *              wrappedBean = applyBeanPostProcessorsBeforeInitialization(wrappedBean, beanName);{
     *                  @PostConstruct ...
     *              }
     *
     *              invokeInitMethods(beanName, wrappedBean, mbd);{
     *                  ((InitializingBean) bean).afterPropertiesSet();
     *                  invokeCustomInitMethod(beanName, bean, mbd);
     *              }
     *
     *              wrappedBean = applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);
     *          }
     *
     */