优化代码

examcloud-core-oe-student-service/src/main/java/cn/com/qmth/examcloud/core/oe/student/service/impl/ExamRecordQuestionsServiceImpl.java

@@ -169,6 +169,9 @@ public class ExamRecordQuestionsServiceImpl implements ExamRecordQuestionsServic
     @Override
     public void submitQuestionAnswer(Long studentId, List<ExamStudentQuestionInfo> examQuestionInfos) {
         ExamSessionInfo examSessionInfo = examSessionInfoService.getExamSessionInfo(studentId);
+        if (null == examSessionInfo){
+            throw new StatusException("200001","考试会话已过期");
+        }
         long examRecordDataId = examSessionInfo.getExamRecordDataId();
 
         ExamRecordQuestionsEntity examRecordQuesitonsEntity = getExamRecordQuestionsAndFixExamRecordDataIfNecessary(examRecordDataId);