一、初始异步加载树
初始化默认给出一个根结点，再结合异步加载的方式手动触发默认加载第一层，如图：
代码如下：
var treeSetting = {async: {enable: true, url:"xxx/demo.do?method=listByTree",dataType:"json",autoParam:["id=pid"]},view: {dblClickExpand: true,selectedMulti: false,expandSpeed: ($.browser.msie && parseInt($.browser.version)<=6)?"":"fast"},data: {simpleData: {enable:true,idKey: "id",pIdKey: "pid",rootPId: "root"}},callback: {onNodeCreated: zTreeOnNodeCreated}};//默认根结点var rootNode = {"id":0, "pid":"root", "name":"商品分类", "open":true, "isParent":true};$(document).ready(function(){var zTreeObj = $.fn.zTree.init($("#tree"), treeSetting, rootNode);var node = zTreeObj.getNodeByParam("id", 0, null);zTreeObj.reAsyncChildNodes(node, "refresh");});
二、异步搜索叶子结点
在使用JQuery ZTREE时可能要用到异步的方式模糊搜索叶子结点，如图：
而如果只使用ZTREE自带的展开方法zTreeObj.expandNode只是会展开改结点，无法触发异步加载；这时候就必须手动调用异步加载的方法进行处理，解决思路如下：
通过在otherParam数组中设值的方式将搜索参数带到后台（无参数时必须将otherParam设为空数组否则一直会将前一次的参数带到后台）；在结点创建完成后的回调函数onNodeCreated中进行手动异步加载。
代码如下：
function searchM() {var param = $.trim($("input[name='param']").val());var treeObj = $.fn.zTree.getZTreeObj("tree");var node = treeObj.getNodeByParam("id", 0, null);if(param != ""){param = encodeURI(encodeURI(param));treeObj.setting.async.otherParam=["param", param];}else {//搜索参数为空时必须将参数数组设为空treeObj.setting.async.otherParam=[];}treeObj.reAsyncChildNodes(node, "refresh");}function zTreeOnNodeCreated(event, treeId, treeNode) {var param = $.trim($("input[name='param']").val());var treeObj = $.fn.zTree.getZTreeObj("tree");//只有搜索参数不为空且该节点为父节点时才进行异步加载if(param != "" && treeNode.isParent){treeObj.reAsyncChildNodes(treeNode, "refresh");} };
