Tag: 克伦

使用Spring创建Scheduler Bean时发生NullPointerException

我想用Spring来创建一个调度器。 @Configuration @EnableScheduling public class MyScheduler { @Autowired MyBusinessService businessService; @Scheduled(cron = "* * * * * *") public void myCronMethod() { } } 在应用程序启动过程中，出现以下错误： java.lang.NullPointerException at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.resolveSchedulerBean(ScheduledAnnotationBeanPostProcessor.java:281) at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.finishRegistration(ScheduledAnnotationBeanPostProcessor.java:221) at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.onApplicationEvent(ScheduledAnnotationBeanPostProcessor.java:200) at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.onApplicationEvent(ScheduledAnnotationBeanPostProcessor.java:94) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:337) at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5068) at […]