1、报错: Expected one result (or null) to be returned by selectOne()
2、原因
在写 Mapper 接口的时候使用对象作为返回值，而在 文件中的 SQL 语句查询出来的记录有很多条，所有使用对象没有办法进行接收。
3、解决办法
将 Mapper 接口的返回值改为 List<对象> 进行数据接收。
相关文章
- : Expected one result (or null) to be returned
- Expected one result (or null) to be returned by selectOne(), but found 2
- mybatis中：returned more than one row, where no more than one was expected.异常
- org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 3报错解决
- Expected one result (or null) to be returned by selectOne(), but found: 3
- mybatis 异常: Invalid bound statement (not found),TooManyResultsException:Expected one result (or null) to be returned by selectOne(), but found