diff --git a/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java b/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java
index c9505acf..87652b91 100644
--- a/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java
+++ b/safety-cedu-service/src/main/java/org/qinan/cedu/service/impl/CoursewareManagementServiceImpl.java
@@ -48,7 +48,7 @@ public class CoursewareManagementServiceImpl extends ServiceImpl<CoursewareManag
                 .page(new Page<>(query.getCurrent(), query.getSize()));
         IPage<CoursewareManagementVO> convert = page.convert(coursewareManagementConvertor::convertEToVo);
         for (CoursewareManagementVO record : convert.getRecords()) {
-            record.setQuestionIds(questionMapper.selectList(new LambdaQueryWrapper<QuestionDO>().eq(QuestionDO::getCoursewareManagementId, record.getId())).stream().map(QuestionDO::getId).collect(Collectors.toList()));
+            record.setQuestionIds(questionMapper.selectList(new LambdaQueryWrapper<QuestionDO>().eq(QuestionDO::getCoursewareManagementId, record.getId())).stream().map(QuestionDO::getId).map(String::valueOf).collect(Collectors.toList()));
         }
         return convert;
     }
@@ -60,7 +60,8 @@ public class CoursewareManagementServiceImpl extends ServiceImpl<CoursewareManag
                 .eq(CoursewareManagementDO::getDeleteEnum, DeleteEnum.FALSE.getCode())
                 .one();
         CoursewareManagementVO coursewareManagementVO = coursewareManagementConvertor.convertEToVo(entity);
-        coursewareManagementVO.setQuestionIds(questionMapper.selectList(new LambdaQueryWrapper<QuestionDO>().eq(QuestionDO::getCoursewareManagementId, coursewareManagementVO.getId())).stream().map(QuestionDO::getId).collect(Collectors.toList()));
+        coursewareManagementVO.setQuestionIds(questionMapper.selectList(new LambdaQueryWrapper<QuestionDO>().eq(QuestionDO::getCoursewareManagementId, coursewareManagementVO.getId()))
+                .stream().map(QuestionDO::getId).map(String::valueOf).collect(Collectors.toList()));
         return coursewareManagementVO;
     }