自己调用自己，拿到需要的tree数据，在回调时会更改掉原有的list，会出现循环错误问题，解决

@GetMapping("/admin/dept/tree/list")
@ResponseBody
@NoWrap
public Object treeList(Integer id) {
   QueryWrapper qw = new QueryWrapper();
   qw.eq("disable", 1);
   qw.eq("id", id);
   List list = deptList(id);
   Dept dept = service.getById(id);
   list.add(dept);
   return TreeUtils.listToTree(list, "id", "parentId", "name", "name", null, dept.getParentId()+"");
}
private List deptList(Integer id){
   QueryWrapper qw = new QueryWrapper();
   qw.eq("disable", 1);
   qw.eq("parentId", id);
   List list = service.list(qw);
   if(list.size()>0){
      for (ListIterator deptListIterator = list.listIterator();deptListIterator.hasNext();){
         Dept next = deptListIterator.next();
         List deptList = deptList(next.getId());
         for (Dept dept : deptList) {
            deptListIterator.add(dept);
         }
      }
   }
   return list;
}

1.用deptListIterator，他会跟着更新原来的list,而不是直接给替换掉。