org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'group_id' in 'class com.fangcun.group_assistant.pojo.Repair'

注意看：这里是group_id,这个字段应该跟实体类的字段名称是一样的才对！

nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for proper_字段

而实体类中却是 groupId ！

nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for proper_实体类_02

解决方法：

将mapper.xml文件中的group_id改为groupId即可。