TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
返回值超過一個，而你設置的接收變量不是集合 ...
原文：TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
類型 異常報告 描述 服務器遇到一個意外的情況，阻止它完成請求。 例外情況 因為查詢到兩條數據 原來的查詢語句 解決方法 添加查詢的用戶的id,會自動將多條數據的同一用戶封裝到一個對象中 將id查詢出來並映射到對象中 ...
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Expected one result (or null) to be returned by selectOne(), but found: 2
看到標題就已經很明了了： 兩種情況： 1.你想查詢一條數據，但返回兩條數據： 2.你想查詢多條數據，但是前台限制只能查詢一條 (1) 檢查自己的數據sql語句寫對沒有（關於mybaties的s ...
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遍歷結果集1-n的時候出現 org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 5 這個異常 ...
Caused by: org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
異常信息 表面上看異常信息是 mybatis 查詢的結果有兩條數據，但是返回的參數用一個對象接受的，於是打斷點調式 at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne ...
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