系统功能背后的逻辑——树的形成
树知识一览:https://www.cnblogs.com/CloudFish/archive/2012/05/09/2493453.html
1.后台返回json格式1:
https://blog.youkuaiyun.com/claram/article/details/54616485
{
“nodeId”: “2”,
“nodeName”: “北京市”,
“parentNodeId”: “1”,
“o...
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