作业改造

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

@@ -56,13 +56,13 @@ public class StudentLessonExaminationServiceImpl extends ServiceImpl<StudentLess
     @Transactional(rollbackFor = Exception.class)
     public List<Integer> save(Long lessonExaminationId, List<StudentLessonExaminationSaveDto> studentLessonExaminationSaveDtos) {
         List<StudentLessonExamination> studentLessonExaminations = new ArrayList<>();
-        List<Integer> studentIdList = Collections.EMPTY_LIST;
+        List<Integer> studentIdList = new ArrayList<>();
         for (StudentLessonExaminationSaveDto dto : studentLessonExaminationSaveDtos) {
             String[] studentIds = dto.getStudentIds().split(",");
             for (String studentId : studentIds) {
                 StudentLessonExamination studentLessonExamination = new StudentLessonExamination();
                 studentLessonExamination.setLessonExaminationId(lessonExaminationId);
-                int parseInt = Integer.parseInt(studentId);
+                Integer parseInt = Integer.parseInt(studentId);
                 studentIdList.add(parseInt);
                 studentLessonExamination.setUserId(parseInt);
                 studentLessonExamination.setSubjectId(dto.getSubjectId());