java.sql.SQLException: Error setting driver on UnpooledDataSource.Caused by: java.lang.IllegalArgumentException: Result Maps collection does not contain value for IStudentDaoMapper.Mapperdao.selectcou

是因为

Caused by: java.lang.IllegalArgumentException: Result Maps collection does not contain value for IStudentDaoMapper.Mapperdao.select是因为resultmaper的值错了