TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
返回值超过一个，而你设置的接收变量不是集合 ...
原文：TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
类型 异常报告 描述 服务器遇到一个意外的情况，阻止它完成请求。 例外情况 因为查询到两条数据 原来的查询语句 解决方法 添加查询的用户的id,会自动将多条数据的同一用户封装到一个对象中 将id查询出来并映射到对象中 ...
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Expected one result (or null) to be returned by selectOne(), but found: 2
看到标题就已经很明了了： 两种情况： 1.你想查询一条数据，但返回两条数据： 2.你想查询多条数据，但是前台限制只能查询一条 (1) 检查自己的数据sql语句写对没有（关于mybaties的s ...
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Caused by: org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
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