我是一步一步按照您的视频上的步奏来写的，最开始使用注解的方式是没有报错的，后来使用xml文件的方式，包括pom.xml（添加mybatis依赖）,mapper.java（接口的方法），mapper.xml（写的一些sql），配置扫描mapper的路径（@MapperScan），application.yml（配置mybatis.config-location找到mabatis的xml的配置文件，就是这儿出的错），后来运行测试用例的时候，就出问题了；后来不管是注解的方式还是xml的方式都报错了，之前测试注解是能够跑通的；当我删掉application.yml中的config-location后，注解的方式还是行的通；这就是我操作的大致步奏，如果mybatis是报的sql语句不对什么的，那个我就不会麻烦您了，自己百度得到。希望您有空能解答我的问题，给您带来的不便，还请包涵。
Caused by: java.io.FileNotFoundException: class path resource [mapper/*.xml] cannot be opened because it does not exist

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is java.io.FileNotFoundException: class path resource [mapper/*.xml] cannot be opened because it does not exist

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'productCatetoryMapper' defined in file [E:\idea_projects_2\sell\target\classes\com\imooc\demo\dataobject\mapper\ProductCatetoryMapper.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is java.io.FileNotFoundException: class path resource [mapper/*.xml] cannot be opened because it does not exist

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is java.io.FileNotFoundException: class path resource [mapper/*.xml] cannot be opened because it does not exist