专业年级班级树调整

src/main/java/com/xjrsoft/module/student/service/impl/StudentManagerServiceImpl.java

@@ -1069,8 +1069,8 @@ public class StudentManagerServiceImpl extends MPJBaseServiceImpl<BaseStudentUse
         if(majorSetList.isEmpty()){
             return new ArrayList<>();
         }
-        List<Long> gradeIds = majorSetList.stream().map(BaseClassMajorSetVo::getGradeId).collect(Collectors.toList());
-        List<Long> majorSetIds = majorSetList.stream().map(BaseClassMajorSetVo::getMajorSetId).collect(Collectors.toList());
+        Set<Long> gradeIds = majorSetList.stream().map(BaseClassMajorSetVo::getGradeId).collect(Collectors.toSet());
+        Set<Long> majorSetIds = majorSetList.stream().map(BaseClassMajorSetVo::getMajorId).collect(Collectors.toSet());
 
         List<BaseGrade> gradeList = baseGradeService.list(
                 new QueryWrapper<BaseGrade>().lambda()