@Slf4j
@Component
public class ContextRefreshListener implements ApplicationListener<ContextRefreshedEvent> {


    @Resource
    private EsFindService esFindService;
    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
           log.info("ContextRefreshedEvent hahah esFindService:{} ",esFindService);
    }
}
@Component
@Slf4j
public class MqClueConsumeListener  implements ApplicationListener<ApplicationStartedEvent>{
    @Override
    public void onApplicationEvent(ApplicationStartedEvent arg0) {
        log.info("hahahahahhaha ApplicationStartedEvent");


    }
}

2020-02-07 20:14:24.553  INFO [crm,,,] 17783 --- [           main] c.h.crm.listener.ContextRefreshListener  : ContextRefreshedEvent hahah esFindService:null 
2020-02-07 20:14:27.740  INFO [crm,,,] 17783 --- [           main] c.h.crm.listener.ContextRefreshListener  : ContextRefreshedEvent hahah esFindService:com.hzrys.crm.service.impl.EsFindServiceImpl@25a2c4dc 
2020-02-07 20:34:56.156 [,] [main] INFO  c.h.c.l.MqClueConsumeListener - [onApplicationEvent,72] - hahahahahhaha ApplicationStartedEvent
 

可以看出ContextRefreshEvent 事件触发2次。 并且第一次，spring factroyBean容器还没初始化完毕，esFindService =null；

而ApplicationStartedEvent只触发一次，并且容器已初始化完毕了。