根据treeId展开指定节点并触发单击事件

ztree.expandNode(ztree.getNodeByParam("id",treeId,null));//展开指定节点
ztree.selectNode(ztree.getNodeByParam("id",treeId,null));//选中指定节点
ztree.setting.callback.onClick(null, ztree.setting.treeId, ztree.getNodeByParam("id",treeId,null));//触发函数