错误TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
一、问题说明转载自:https://www.cnblogs.com/zcleilei/p/6245617.html具体错误提示如下:org.mybatis.spring.MyBatisSystemException:nestedexceptionisorg.apache.ibatis.exceptions.TooManyResultsException:Expectedoneresult(ornu