教材管理查看详情-征订记录班级信息完善，测试增删改

src/main/java/com/xjrsoft/module/textbook/service/impl/TextbookServiceImpl.java

@@ -1,6 +1,7 @@
 package com.xjrsoft.module.textbook.service.impl;
 
 import cn.hutool.core.util.ObjectUtil;
+import cn.hutool.core.util.StrUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
@@ -13,7 +14,9 @@ import com.xjrsoft.module.textbook.mapper.TextbookSubscriptionRecordMapper;
 import com.xjrsoft.module.textbook.service.ITextbookService;
 import com.xjrsoft.module.textbook.service.IWfTextbookSubscriptionService;
 import com.xjrsoft.module.textbook.vo.TextbookPageVo;
+import com.xjrsoft.module.textbook.vo.TextbookSubscriptionClassVo;
 import com.xjrsoft.module.textbook.vo.TextbookSubscriptionRecordVo;
+import com.xjrsoft.module.textbook.vo.TextbookSubscriptionClassVo;
 import lombok.AllArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;