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[英]org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'itemAttrService' is defined
[英]org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'eventpublisher' available
我有一个Spring Boot应用程序。 我用@Component注解注释了项目的类。 现在在我的主类中,当我尝试获取该类的bean时,出现一个异常,即它无法找到该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.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)
我的班级被注释为组件
@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;
}
}
@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();
}
作为记录在这里
Spring按照上述规则为未命名的组件生成Bean名称:本质上, 采用简单的类名称并将其初始字符转换为小写
因此,当拥有通过组件扫描检测到的EventPublisher
类时,所得的bean名称将为eventPublisher
。
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