解决材料缴交报错问题

src/main/java/com/xjrsoft/module/material/service/impl/MaterialTypeServiceImpl.java

@@ -1,6 +1,7 @@
 package com.xjrsoft.module.material.service.impl;
 
 import cn.hutool.core.bean.BeanUtil;
+import cn.hutool.core.util.StrUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
@@ -202,6 +203,9 @@ public class MaterialTypeServiceImpl extends MPJBaseServiceImpl<MaterialTypeMapp
 
         for(MaterialTypeVo materialTypeVo : pageOutput){
             String materialCategoryStr = materialTypeVo.getMaterialCategory();
+            if(StrUtil.isEmpty(materialCategoryStr)){
+                continue;
+            }
             String[] materialCategoryStrArr = materialCategoryStr.split(",");
 
             for (String category : materialCategoryStrArr) {