优化代码

examcloud-core-oe-admin-api-provider/src/main/java/cn/com/qmth/examcloud/core/oe/admin/api/provider/ExamRecordForMarkingCloudServiceProvider.java

@@ -169,6 +169,12 @@ public class ExamRecordForMarkingCloudServiceProvider extends ControllerSupport
         if (stuIdList.size() > 0) {
             List<ExamRecordForMarkingEntity> examRecordForMarkingList =
                     examRecordForMarkingService.queryValidExamRecordInfoByStuIds(examId, courseId, stuIdList, req.getBatchNum());
+
+            if (null == examRecordForMarkingList) {
+                resp.setExamRecordForMarkingBeanList(null);
+                return resp;
+            }
+
             for (ExamRecordForMarkingEntity entity : examRecordForMarkingList) {
                 ExamRecordForMarkingBean examRecordForMarkingBean = new ExamRecordForMarkingBean();
                 examRecordForMarkingBean.setId(entity.getId());