zTree异步加载全部节点

<div style="border:solid 1px #a7b5bc; float:left; width:100%; height:100%; overflow-y:auto;"> 
 <ul id="tree" class="ztree"></ul> 
</div>

<script type="text/javascript"> 
 //初始化树 
 $(function() { 
 $zTree = $.fn.zTree.init($("#tree"), $setting); 
 
 //延迟展开根节点 
 setTimeout(function(){ 
 var nodes = $zTree.getNodes(); 
 if(nodes.length >0){ 
 $zTree.expandNode($zTree.getNodes()[0], true, false, false); 
 } 
 },1000); 
 }); 
 
 //定义ztree树所需变量 
 var $zTree; 
 var $zTreeFlag = true; 
 var $setting = { 
 async : { 
 enable : true, 
 url : "/baseplatform/auth/selectSysRoleUserTreeByPid.do", 
 autoParam : ["id"], 
 otherParam: {"srId":'${sysRole.srId}'} 
 }, 
 callback : { 
 onAsyncSuccess : onAsyncSuccess 
 }, 
 data : { 
 key : {name : "name"}, 
 simpleData : {enable : true, idKey : "id", pIdKey : "pId", rootPId : -1} 
 }, 
 check: { 
 enable: true 
 } 
 }; 
 
 //每次加载节点触发的方法 
 function onAsyncSuccess(event, treeId, treeNode, msg) { 
 //递归展开子节点 
 if(treeNode != undefined){ 
 expandNodes(treeNode.children, "tree"); 
 } 
 } 
 
 //递归展开子节点 
 function expandNodes(nodes, treeId) { 
 if (!nodes) return; 
 var zTree = $.fn.zTree.getZTreeObj(treeId); 
 for (var i=0, l=nodes.length; i<l; i++) { 
 zTree.expandNode(nodes[i], true, false, false); 
 if (nodes[i].isParent && nodes[i].zAsync) { 
 expandNodes(nodes[i].children, treeId); 
 } 
 } 
 } 
</script>