fix

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

@@ -584,6 +584,9 @@ public class ClassGradeServiceImpl extends ServiceImpl<ClassGradeMapper, ClassGr
                             throw new CustomException(studyAccountStatusQueryBo.getRealname() + "学员信息为空");
                         }
                         CertInfoListItem certInfoListItem = new CertInfoListItem();
+                        if(Validator.isEmpty(personRoot.getCertInfoList())||personRoot.getCertInfoList().size()==0){
+                            throw new CustomException(studyAccountStatusQueryBo.getRealname() + "学员信息为空");
+                        }
                         for (CertInfoListItem certInfo : personRoot.getCertInfoList()) {
                             if (studyAccountStatusQueryBo.getWorkTypeName().equals(certInfo.getWorkTypeName())) {
                                 BeanUtils.copyProperties(certInfo, certInfoListItem);