org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named ‘XXX‘

一、报错信息

org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'statisticsServiceImpl' is expected to be of type 'cn.xbao.pet.service.impl.StatisticsServiceImpl' but was actually of type 'com.sun.proxy.$Proxy43'

二、原因

没有遵循Spring的代理机制，错误地使用类注入：

三、解决

面向接口编程，接口注入：