SpringBoot中A component required a bean of type ‘com.xxx.xxx.dao.PaymentDao‘ that could not be found.

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-12-29 22:52:35.557 ERROR [cloud-payment-service,,,] 13720 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

A component required a bean of type 'com.xxx.xxx.dao.PaymentDao' that could not be found.

Action:

Consider defining a bean of type 'com.xxx.xxx.dao.PaymentDao' in your configuration.

Process finished with exit code 0

 解决方法：

        这里报错是因为我的dao层的bean没有被spring扫到，这时候第一反应就是去看看自己的dao层是否添加对应的注解。

  如图：我的已经添加了对应的Mapper注解但是还是扫描不到，然后在自己的启动类上添加

@ComponentScan(basePackages = {"com.lzh.cloudstudy.dao"})

 然后就解决了这一层没法被扫到的错误。