org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.executor.ExecutorException:
A query was run and no Result Maps were found for the Mapped Statement 'com.demo.dao.UserDao.check'. It's likely that neither a Result Type nor a Result Map was specified.
改为,这是因为没有写返回类型出错
修改后clean Tomcat;
修改完成后,项目还不能执行,可能是Tomcat,不刷新,
修改如图配置,修改成功再次执行即可解决。