js将有父子关系的数据转换成树形结构数据，最简单的方法

js代码：

   function buildTree(list){
        let temp = {};
        let tree = [];
        for(let i in list){
            temp[list[i].treeId] = list[i];
        }
        for(let i in temp){
            if(temp[i].parentTreeId) {
                if(!temp[temp[i].parentTreeId].children) {
                    temp[temp[i].parentTreeId].children = [];
                }
                temp[temp[i].parentTreeId].children.push(temp[i]);
            } else {
                tree.push(temp[i]);
            }
        }
        return tree;
    }
    buildTree(data)

//这里需要确认的就是id（文中的treeId）和父id（parentTreeId）
//以及父子之间的联系属性（children ），对应替换就可以了

原始数据示例：

    var data = [
        {
            "name": "aaa",
            "treeId": "1",
            "type": 1
        },
        {
            "name": "bbb",
            "parentTreeId": "1",
            "treeId": "2",
            "type": 2
        },
        {
            "name": "ccc",
            "parentTreeId": "1",
            "treeId": "3",
            "type": 3
        },
        {
            "name": "ddd",
            "parentTreeId": "1",
            "treeId": "4",
            "type": 2
        },
        {
            "abb": "eee",
            "name": "qwe123",
            "parentTreeId": "2",
            "treeId": "5",
            "type": 1
        },
        {
            "name": "fff",
            "parentTreeId": "2",
            "treeId": "6",
            "type": 2
        },
        {
            "name": "ggg",
            "parentTreeId": "3",
            "treeId": "7",
            "type": 2
        },
        {
            "name": "hhh",
            "parentTreeId": "3",
            "treeId": "8",
            "type": 2
        },
        {
            "name": "iii",
            "parentTreeId": "3",
            "treeId": "9",
            "type": 3
        },
        {
            "name": "jjj",
            "parentTreeId": "3",
            "treeId": "10",
            "type": 2
        },
        {
            "name": "kkk",
            "parentTreeId": "5",
            "treeId": "11",
            "type": 2
        },
        {
            "name": "lll",
            "parentTreeId": "5",
            "treeId": "12",
            "type": 2
        },
        {
            "name": "mmm",
            "parentTreeId": "5",
            "treeId": "13",
            "type": 2
        },
        {
            "name": "nnn",
            "parentTreeId": "5",
            "treeId": "14",
            "type": 2
        }
    ];