MyBatisSystemException: nested exception

Question

运行时异常:nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

 

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

Answer 1

对呀的

Answer 2

这不是写的很清楚吗 你用findOne方法查到两条数据