1、添加教务老师字段

2、布置作业

mec-biz/src/main/java/com/ym/mec/biz/service/impl/GroupClassServiceImpl.java

@@ -155,6 +155,8 @@ public class GroupClassServiceImpl implements GroupClassService {
                 //剩余课程时长
                 Integer totalCourseTime=groupNotStartCourses.size()*coursesGroup.getSingleClassMinutes();
                 sysTenantAccountService.update(coursesGroup.getTeacherId(), totalCourseTime, "", SysTenantAccountDetail.TransType.CONSUME, "",BigDecimal.ZERO,"关闭课程组");
+            }else{
+                throw new BizException("此课程组已结束");
             }
             cleanGroupInfo(groupId.toString(), GroupType.COMM);
             coursesGroup.setMemo("主动关闭课程组");