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org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

本文轉載自   查看原文   2020-01-12 21:38   2317    bug

在配置mybatis操作數據庫的時候會出現：

org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

 

這是因為查詢結果的期望一條或者為空，但是實際上返回的記過有兩條。就是說數據表中有多條數據的，自己期望的獲取到的數據和操作數據庫時，返回的數據的條數不對應導致的。

 

解決：

　　1、檢查操作數據庫的配置文件返回的類型是否和java中的返回類型一致

　　2、檢查resultType 或resultMap中的數據類型是否和接口中的一致

　　3、檢查傳遞的參數的個數

　　4、檢查數據庫的數據是否有錯誤

 

基本的一些錯誤，可能還有很多錯誤是出現這個bug的，遇到了在總結

 

 

 

　


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猜您在找 mybatics異常org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 5 Caused by: org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2 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 java報錯nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2 org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2 at org.m TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2 TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2 TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 7 mybatis 異常: Invalid bound statement (not found),TooManyResultsException:Expected one result (or null) to be returned by selectOne(), but found Expected one result (or null) to be returned by selectOne(), but found: 2
 
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