Spring 常用的类

BeanPostProcessor

如果BeanFactory装配了BeanPostProcessor后置处理器。可以在bean初始化完成后或者初始化之前对bean进行重新处理。
如

public Object postProcessAfterInitialization(Object obj, String beanName) throws BeansException {                if (beanName.equals("myAnnoService")) {                    Annotation[]  annos = obj.getClass().getDeclaredAnnotations();                    for (Annotation anno:annos) {                        System.out.println("hello world " + anno.annotationType().getName());                    }                }                return obj;            }

BeanFactoryAware

如果bean实现了BeanFactoryAware接口，则将调用setBeanFactory方法，将BeanFactory容器实例设置到bean中。

@Componentpublic class BeanNameAwareTest implements BeanFactoryAware {    private BeanFactory factory;    public void setBeanFactory(BeanFactory arg0) throws BeansException {        // TODO Auto-generated method stub        factory = arg0;        MyAnnoService service = factory.getBean(MyAnnoService.class);        System.out.println("factory inint ok");        service.test();    }}