springboot异常Annotation-specified bean name.. for bean class ...

异常：

springframework.beans.factory.BeanDefinitionStoreException: Failed to
parse configuration class [com.itcodai.course01.Course01Application];
nested exception is
org.springframework.context.annotation.ConflictingBeanDefinitionException:

Annotation-specified bean name ‘testController’ for bean class
[com.itcodai.course01.Swagger2Test.TestController] conflicts with
existing, non-compatible bean definition of same name and class
[com.itcodai.course01.MVCTest.TestController]

情景：

项目新增一个类之后，项目就报错了。但出错比较容易找。

原因：

类重命名问题。然后对照我的项目中的注解，果然是新增的TestController类重名了。