Mybatis 中Expected one result (or null) to be returned by selectOne(), but found: 5
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org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 4
到这个错误的原因就是因为你的查询方法中得到两个两个结果集,然而你的返回用了一个实体去接收，程序这个时候就不知道如何去分配了，很果断的报这个错,
修改方法为使用一个list来接收就没有问题了。
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