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控制台报错 ### Error querying database. Cause: java.sql.SQLSyntaxErrorException: Unknown column 'user_name' in 'field list' ### The error may exist in panfeng/mapper/StudentMapper.java (best guess) ### The error may involve panfeng.mapper.StudentMapper.se…

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Error querying database. Cause: java.sql.SQLException: ORA-01745: 无效的主机/绑定变量名

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初学MyBatis（踩坑）Error querying database. Cause: java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long

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mybatis 执行查询时报错 【Error querying database. Cause: java.sql.SQLException: Error setting driver on UnpooledDataSource. Cause: java.lang.ClassNotFoundException: Cannot find class: 】

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