fix

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

@@ -458,7 +458,7 @@ public class StudentLessonTrainingDetailServiceImpl extends ServiceImpl<StudentL
             }
 
             studentLessonTrainingStat.setMemo(v.get(0).getMemo());
-            studentLessonTrainingStat.setSubjectName(String.join(",", subjectNameList));
+            studentLessonTrainingStat.setSubjectName(String.join("、", subjectNameList));
             studentLessonTrainingStat.setStudentNum(userIds.size());
             studentLessonTrainingStat.setShouldSubmitNum(userIds.size());
             studentLessonTrainingStat.setSubmitNum(submitNum);