今日改造SpringBoot项目时，发现部分子项目下的页面报错，异常信息显示为：创建Bean错误，底层的原因是无法找到Mapper文件的依赖关系，Spring无法自动装配，建议将自动装配设置为true。

经过一番的了解与学习，通过添加@MapperScan即可解决，记录以备后用！

完整的异常信息为：

{success=false, errorMessage=Error creating bean with name 'XXXController': Unsatisfied dependency expressed through field 'XXXService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXXService': Unsatisfied dependency expressed through field 'mapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.XXX.modules.XXX.mapper.XXXMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}, message=org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXXController': Unsatisfied dependency expressed through field 'XXXService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'XXXService': Unsatisfied dependency expressed through field 'mapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.XXX.modules.XXX.mapper.XXXMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}}

解决办法：

在SpringBoot的Application中添加@MapperScan注解，value=“"com.**.mapper"”