org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement
org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.xxxx.mapper.EmployeeMapper.selectBybelongweeknull'. It's likely that neither a Result Type nor a Result Map was specified.
原因是我没有写返回类型
修改后：
