1、陪练课调整

2、付费陪练课可预约时间调整

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

@@ -120,10 +120,9 @@ public class GroupClassServiceImpl implements GroupClassService {
             if(!practiceGroup.getGroupStatus().equals(GroupStatusEnum.NORMAL)||practiceGroup.getCoursesExpireDate().before(now)){
                 throw new BizException("当前课程组不可关闭");
             }
-            if(Objects.isNull(refundAmount)){
-                throw new BizException("请指定退款金额");
+            if(Objects.nonNull(refundAmount)&&refundAmount.compareTo(BigDecimal.ZERO)>0){
+                sysUserCashAccountService.updateBalance(practiceGroup.getStudentId(), refundAmount, PlatformCashAccountDetailTypeEnum.REFUNDS, "后团关闭网管课");
             }
-            sysUserCashAccountService.updateBalance(practiceGroup.getStudentId(), refundAmount, PlatformCashAccountDetailTypeEnum.REFUNDS, "后团关闭网管课");
             cleanGroupInfo(groupId.toString(), GroupType.PRACTICE);
             practiceGroup.setMemo("后台关闭网管课");
             practiceGroup.setGroupStatus(GroupStatusEnum.CANCEL);