修改学生考勤

mec-education/src/main/java/com/ym/mec/education/service/impl/StudentAttendanceServiceImpl.java

@@ -152,7 +152,7 @@ public class StudentAttendanceServiceImpl extends ServiceImpl<StudentAttendanceM
         Page<StudentAttendanceStatisticsResp> pageResult = new Page();
         ClassGroup classGroup = groupService.getById(classGroupReq.getGroupId());
         if (Objects.nonNull(classGroup)) {
-            List<String> subjectNameList = Lists.newArrayList();
+            List<String> subjectNameList;
             if (Objects.nonNull(classGroupReq.getSubjectId())) {
                 subjectNameList = Lists.newArrayList(subjectService.getById(classGroupReq.getSubjectId()).getName());
             } else {