Spring---循环依赖-@Resource

 

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/**     *  【循环依赖---@Resource】     *      BeanPostProcessor ： org.springframework.context.annotation.CommonAnnotationBeanPostProcessor     *                              org.springframework.beans.factory.config.BeanPostProcessor implementation that supports common Java annotations out of the box, in particular the JSR-250 annotations in the javax.annotation package.     *                              BeanPostProcessor实现，支持 公共Java注解，特别是 javax.annotation 的注解；     *     *                              This post-processor includes support for the javax.annotation.PostConstruct and javax.annotation.PreDestroy annotations     *                                  - as init annotation and destroy annotation, respectively - through inheriting from InitDestroyAnnotationBeanPostProcessor with pre-configured annotation types.     *                              该BeanPostProcessor支持 javax.annotation.PostConstruct、javax.annotation.PreDestroy（通过继承的InitDestroyAnnotationBeanPostProcessor 实现）；     *     *     *      public class CommonAnnotationBeanPostProcessor extends InitDestroyAnnotationBeanPostProcessor implements InstantiationAwareBeanPostProcessor, BeanFactoryAware, Serializable {     *          public PropertyValues postProcessProperties(PropertyValues pvs, Object bean, String beanName) {}     *      }     *     *     *      AbstractAutowireCapableBeanFactory#populateBean{     *          ...     *          if (hasInstAwareBpps) {     *              for (BeanPostProcessor bp : getBeanPostProcessors()) {     *                  ...     *                  PropertyValues pvsToUse = ibp.postProcessProperties(pvs, bw.getWrappedInstance(), beanName);     *                  ...     *              }     *          }     *          ...     *      }     */