一級Id為負數、parentId為空，二級parentId等于一級id，三級parentId等于二級id[{"name": "廣東","Id": -1,"parentId": null},{"name": "湖北","Id": -2,"parentId": null},{"name": "廣州","Id": 44,"parentId": -1},{"name": "武漢","Id": 58,"parentId": -2},{"name": "深圳","Id": 12,"parentId":-1 },{"name": "白云","Id": 741,"parentId": 44}]
根據下面數組怎么生成三級聯動菜單樹？（考慮性能）
長風秋雁
2018-09-03 12:17:18