fix: 修复误删审批人问题

laws-modules/src/main/java/com/jero/modules/activiti/service/ProcessNodeLinkService.java

@@ -1,5 +1,6 @@
 package com.jero.modules.activiti.service;
 
+import cn.hutool.core.util.StrUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.StringUtils;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
@@ -42,10 +43,12 @@ public class ProcessNodeLinkService extends ServiceImpl<ProcessNodeLinkMapper, P
             List<String> userIdList = new ArrayList<>();
             if (map.containsKey(variableName)) {
                 String s = (String) map.get(variableName);
-                if (VariableTypeEnum.LIST.getName().equals(variableType)) {
-                    userIdList.addAll(Arrays.asList(s.split(",")));
-                }else {
-                    userIdList.add(s);
+                if (StrUtil.isNotBlank(s)) {
+                    if (VariableTypeEnum.LIST.getName().equals(variableType)) {
+                        userIdList.addAll(Arrays.asList(s.split(",")));
+                    }else {
+                        userIdList.add(s);
+                    }
                 }
             }
             if (!userIdList.isEmpty()) {