Could not autowire. No beans of ‘Person‘ type found

No qualifying bean of type ‘com.atguigu.springboot.bean.Person’ available: expected at least 1 bean which qualifies as autowire candidate.

问题复现：在Person person;上面添加@Autowired后，出现红色波浪线

运行测试类后报的错误如下：
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘com.atguigu.springboot.bean.Person’ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

出错原因：没有在person类上面添加@Component，它的作用是：把普通Java对象实例化到spring容器中。（