fix

zhongzheng-system/src/main/java/com/zhongzheng/modules/grade/service/impl/ClassGradeServiceImpl.java

@@ -1830,7 +1830,7 @@ public class ClassGradeServiceImpl extends ServiceImpl<ClassGradeMapper, ClassGr
     @Override
     public List<ClassGradeVo> searchGradeList(ClassGradeQueryBo bo) {
         List<ClassGradeVo> classGradeVos = entity2Vo(baseMapper.searchGradeList(bo));
-        if (CollectionUtils.isEmpty(classGradeVos)) {
+        if (Validator.isEmpty(classGradeVos)||CollectionUtils.isEmpty(classGradeVos)) {
             return new ArrayList<>();
         }
         classGradeVos.forEach(item -> {