bug修复

src/main/java/com/xjrsoft/module/student/controller/StudentReportRecordController.java

@@ -253,7 +253,7 @@ public class StudentReportRecordController {
                         && StudyStatusEnum.AttendDaySchool.getCode().equals(x.getStduyStatus())
                         && x.getReportTime() != null
         ).count());
-        Map<String, List<StudentReportRecordStatisticsListVo>> graduatedUniversityMap = dataList.stream().collect(Collectors.groupingBy(StudentReportRecordStatisticsListVo::getGraduatedUniversity));
+        Map<String, List<StudentReportRecordStatisticsListVo>> graduatedUniversityMap = dataList.stream().filter(x -> x.getReportTime() != null).collect(Collectors.groupingBy(StudentReportRecordStatisticsListVo::getGraduatedUniversity));
         List<ItemCountVo> graduatedUniversityList = new ArrayList<>();
         for (String graduatedUniversity : graduatedUniversityMap.keySet()) {
             graduatedUniversityList.add(