树状菜单保存选中。下次打开还是选中上次保存的

页面代码：

<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ include file="../util/util.jsp" %>

var setting = { check: { enable: true, //每个节点上是否显示 CheckBox chkboxType: {"Y" : "p", "Y" : "ps"} //选中父选中子，选中子的时候也选中父,取消的时候也关联 }, view: { dblClickExpand: false }, data: { simpleData: { enable: true } }, callback: { beforeClick: beforeClick, onCheck: onCheck } }; var zNodes = null; function beforeClick(treeId, treeNode) { var zTree = $.fn.zTree.getZTreeObj("treeDemo"); zTree.checkNode(treeNode, !treeNode.checked, null, true); return false; } function onCheck(e, treeId, treeNode) { var zTree = $.fn.zTree.getZTreeObj("treeDemo"), nodes = zTree.getCheckedNodes(true), //获取选中的节点 // alert(nodes); v = "",vid = ""; //vid是获取到的id ，从父节点开始 v是获取到的节点的文本内容 for (var i=0, l=nodes.length; i<l; i++) { v += nodes[i].name + ","; vid += nodes[i].id + ","; document.getElementById('ruAutId').value=nodes[i].id; } if (v.length > 0 ) v = v.substring(0, v.length-1); if (vid.length > 0 ) vid = vid.substring(0, vid.length-1); $('#ruAutId').val(vid); } function showMenu() { if(zNodes==null){ $.ajax({ url:'${basePath}whData/roleTree', data:{}, dateType:'json', success:function(data){ if(data){ var str = "["; $.each(data,function(i,n){ str += '{"id":'+n.ID+',"pId":'+n.PID+',"name":"'+$.trim(n.NAME)+'"}'; if(i<data.length-1){ str += ","; } }); zNodes = str+"]"; zNodes = $.parseJSON(zNodes); $.fn.zTree.init($("#treeDemo"), setting, zNodes); var treeObj = $.fn.zTree.getZTreeObj("treeDemo"); treeObj.expandAll(true); if ($('#ruAutId').val()!='') { var treeObj = $.fn.zTree.getZTreeObj("treeDemo"); var nodes = treeObj.getNodes(); if (nodes.length>0) { var yydValues = $('#ruAutId').val(); $.each(yydValues.split(","),function(i,val){ if($('#treeDemo_'+val+'_check').parent().find('ul').length==0){ $('#treeDemo_'+val+'_check').trigger("click"); } }); } } }else { alertMsg.error('权限树加载失败！'); } } }); }else { $.fn.zTree.init($("#treeDemo"), setting, zNodes); var treeObj = $.fn.zTree.getZTreeObj("treeDemo"); treeObj.expandAll(true); } } $(function(){ showMenu(); });

zTree的每个节点有个checked属性，在你拼接zNodes对象的时候，根据数据库存储的选中信息，设置各个树形节点的checked属性。
参考API:http://www.ztree.me/v3/demo.php#_201