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.itheima.dao.CheckGroupDao.findAll'. It's likely that neither a Result Type nor a Result Map was specified.
xml文件里面参数类型有问题
parameterType:有参数
resultType:没有参数