相关疑难解决方法(0)

我遇到了这个链接,它解释了bean如何被继承.假设此示例中的HelloWorld类使用@Component注释作为bean公开,如何创建另一个继承此bean的bean？我是否可以使用extends来继承HelloWorld bean并将@Component添加到新类中以扩展现有bean,将其公开为具有其他功能的新bean？

我浏览了此链接：使用注释的Spring Bean继承Bean还引用了问题和其他链接，但它尚未解决我的问题。

我正在研究Spring Boot Batch示例。在此示例中，出现以下错误-

org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'employeesJob' defined in class path resource [com/prateek/job/EmployeesJob.class]: factory-bean reference points back to the same bean definition
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:703) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:667) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:635) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1489) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1012) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.requiresEagerInitForType(DefaultListableBeanFactory.java:498) [spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:418) [spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:390) [spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:189) [spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:710) [spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:535) [spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
        at com.prateek.SpringBatchClassicDbApplication.main(SpringBatchClassicDbApplication.java:10) [classes/:na] …