增加为空判断 正巧遇到limitNum的倍数无数据 会有问题ArrayIndexOutOfBoundsException: -1

liquidnet-bus-client/liquidnet-client-admin/liquidnet-client-admin-zhengzai/src/main/java/com/liquidnet/client/admin/zhengzai/kylin/service/impl/KylinRefundExecuteServiceImpl.java

@@ -81,8 +81,12 @@ public class KylinRefundExecuteServiceImpl {
             }
 
             count = orderList.size();
-            KylinOrderTickets lastInfo = orderList.get(count - 1);
-            mid = lastInfo.getMid();
+            if (count > 0) {
+                KylinOrderTickets lastInfo = orderList.get(count - 1);
+                if (lastInfo != null) {
+                    mid = lastInfo.getMid();
+                }
+            }
         } while (count >= limitNum);
 
         KylinOrderRefundBatches updateBatchData = new KylinOrderRefundBatches();