Java org.springframework.beans.factory.NoSuchBeanDefinitionException:没有名为';eventpublisher';可获得的
我有一个Spring启动应用程序。我用@Component注释了项目的一个类。现在在我的主类中,当我试图获取该类的bean时,我得到一个异常,它无法找到该beanJava org.springframework.beans.factory.NoSuchBeanDefinitionException:没有名为';eventpublisher';可获得的,java,spring,spring-boot,Java,Spring,Spring Boot,我有一个Spring启动应用程序。我用@Component注释了项目的一个类。现在在我的主类中,当我试图获取该类的bean时,我得到一个异常,它无法找到该bean Exception in thread "main" [2m2017-05-08 09:53:55.303[0;39m [32m INFO[0;39m [35m9112[0;39m [2m---[0;39m [2m[ Thread-2][0;39m [36ms.c.a.AnnotationConfigApplication
Exception in thread "main" [2m2017-05-08 09:53:55.303[0;39m [32m INFO[0;39m [35m9112[0;39m [2m---[0;39m [2m[ Thread-2][0;39m [36ms.c.a.AnnotationConfigApplicationContext[0;39m [2m:[0;39m Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@4df828d7: startup date [Mon May 08 09:53:54 EDT 2017]; root of context hierarchy
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'eventpublisher' available
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:687)
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1207)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1081)
at com.fannie.SpringEventGenerationJBsApplication.main(SpringEventGenerationJBsApplication.java:17)
注释为组件的类如下
@Component
public class EventPublisher implements ApplicationEventPublisherAware {
@Autowired
private ApplicationEventPublisher publisher;
public void eventpublishers() {
ActualEvent actualEvent = new ActualEvent(this);
System.out.println(actualEvent);
publisher.publishEvent(actualEvent);
}
@Override
public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
this.publisher = publisher;
}
}
有案可查 Spring为未命名的组件生成bean名称,遵循上述规则:基本上,采用简单的类名,并将其初始字符改为小写
因此,当组件扫描检测到类
EventPublisher
时,生成的bean名称将是EventPublisher
Bean名称是从类名生成的,第一个字符小写。。。因此,EventPublisher
将变成EventPublisher
而不是EventPublisher
。谢谢你这么做。非常感谢。@M.Deinum也许你应该加上这个作为答案。你刚刚解决了我的问题,如果我至少能投你一票,那就太棒了。@DP3请接受@M.Deinum
在他写答案时的回答。这对我和你都有用。:)
@SpringBootApplication
@ComponentScan(basePackages = {"com.fannie"})
public class SpringEventGenerationJBsApplication {
public static void main(String[] args) {
ApplicationContext context = SpringApplication.run(SpringEventGenerationJBsApplication.class, args);
EventPublisher ep = (EventPublisher) context.getBean("eventpublisher");
ep.eventpublishers();
}