[java]BeanPostProcessor使用及源碼

自定義BeanPostProcessor寫法

@Component
public class MyBeanPostProcessor implements BeanPostProcessor {

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        System.out.println("postProcessBeforeInitialization... " + beanName);
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        System.out.println("postProcessAfterInitialization... " + beanName);
        return bean;
    }
}

源碼

populateBean(beanName, mbd, instanceWrapper);
    exposedObject = initializeBean(beanName, exposedObject, mbd);
        wrappedBean = applyBeanPostProcessorsBeforeInitialization(wrappedBean, beanName);
        invokeInitMethods(beanName, wrappedBean, mbd);
        wrappedBean = applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);