spring 的 InitializingBean

public interface InitializingBean {

/**
* Invoked by a BeanFactory after it has set all bean properties supplied
* (and satisfied BeanFactoryAware and ApplicationContextAware).
* <p>This method allows the bean instance to perform initialization only
* possible when all bean properties have been set and to throw an
* exception in the event of misconfiguration.
* @throws Exception in the event of misconfiguration (such
* as failure to set an essential property) or if initialization fails.
*/
void afterPropertiesSet() throws Exception;

}

如果想在bean初始化的时候做一些操作，则可以继承自InitializingBean 接口；

这个接口只有一个方法就是afterPropertiesSet 作用就是当bean的各个属性初始化之后，会调用此方法

spring的具体实现是在AbstractAutowireCapableBeanFactory类中 invokeInitMethods方法会调用 afterPropertiesSet 

spring 的 InitializingBean

原文：https://www.cnblogs.com/liguangming/p/9645396.html