1、在書寫Springboot練習的時候報錯，檢查mybatis的配置文件並未發現錯誤，采用的是springoot+mybatis
配置文件：已經配置了接口的實現
在Controller中也已經注入了studentdao
2、解決方案
在啟動類中添加注解，掃描配置文件
測試結果：無報錯
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