nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or n

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nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 3

本来只想要一个结果,结果出现了太多得结果

把数据库中重复得数据,删除就好了!



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