Could not autowire. No beans of BookDao' type found

在做Spring或者SpringBoot项目时，在测试类中创建一个实体类属性并进行自动装配时，回报红：Could not autowire. No beans of BookDao' type found（只是环境的原因，不是错误）

 直接Alt + Enter，将错误改成警告即可

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