ztree树id、pid转成children格式的数据 - 《JavaScript》

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 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>将id pid的转成children格式的</title>
 </head>
 <body>
  <script type="text/javascript">
var nodes = [
    {id:73, pId:0,treeCode:73, treePCode:0, name: "父节点1"},
    {id:7301, pId:73,treeCode:7301, treePCode:73, name: "子节点1"},
    {id:73011, pId:7301,treeCode:73011, treePCode:7301, name: "子节点1"},
    {id:73012, pId:7301, treeCode:73012, treePCode:7301,name: "子节点1"},
    {id:7302, pId:73, treeCode:7302, treePCode:73,name: "子节点1"},
    {id:73021, pId:7302,treeCode:73021, treePCode:7302, name: "子节点1"},
    {id:73022, pId:7302,treeCode:73022, treePCode:7302, name: "子节点1"}
];
window.onload=function(){
    var mm=listToTree(nodes);
    console.log(mm)
}
function listToTree(data, options) {
    if (data && data.length) {
        options = options || {}
        let ID_KEY = options.idKey || 'id'
        let PARENT_KEY = options.parentKey || 'pId'
        let CHILDREN_KEY = options.childrenKey || 'children'
        let tree = []
        let childrenOf = {}
        var item, id, parentId
        for (var i = 0, length = data.length; i < length; i++) {
            item = data[i]
            id = item[ID_KEY]
            parentId = item[PARENT_KEY] || 0
            // 每行数据都可能存在子类
            childrenOf[id] = childrenOf[id] || []
            // 初始化子类
            item[CHILDREN_KEY] = childrenOf[id]
            if (parentId != 0) {
                // 初始化其父的子节点
                childrenOf[parentId] = childrenOf[parentId] || []
                // 把它推到父类下的children
                childrenOf[parentId].push(item)
            } else {
                tree.push(item)
            }
        }
        return tree
    } else {
        return []
    }
}
  </script>
 </body>
</html>