获取ztree 当前节点的所有父节点name！

 function getFilePath(treeObj) {
        if (treeObj == null) return "";
        var filename = treeObj.NAME;
        var pNode = treeObj.getParentNode();
        if (pNode != null) {
            filename = getFilePath(pNode) + ">" + filename;
        }
        return filename;
    }