diff --git a/src/main/java/cn/teammodel/controller/admin/service/impl/ExamServiceImpl.java b/src/main/java/cn/teammodel/controller/admin/service/impl/ExamServiceImpl.java
index 8bad3eb..f7b80d8 100644
--- a/src/main/java/cn/teammodel/controller/admin/service/impl/ExamServiceImpl.java
+++ b/src/main/java/cn/teammodel/controller/admin/service/impl/ExamServiceImpl.java
@@ -3,14 +3,9 @@ package cn.teammodel.controller.admin.service.impl;
 import cn.teammodel.common.ErrorCode;
 import cn.teammodel.config.exception.ServiceException;
 import cn.teammodel.controller.admin.service.ExamService;
-import cn.teammodel.model.dto.admin.common.RGroupList;
 import cn.teammodel.model.dto.admin.exam.OverViewDto;
-import cn.teammodel.model.entity.common.Exam;
 import cn.teammodel.repository.ExamRepository;
 import cn.teammodel.utils.GroupUtil;
-import cn.teammodel.utils.SnowflakeIdGenerator;
-import com.alibaba.fastjson.JSON;
-import com.alibaba.fastjson.TypeReference;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.env.Environment;
 import org.springframework.stereotype.Service;