首先介绍zTree： zTree 是一个依靠 jQuery 实现的多功能 “树插件”。优异的性能、灵活的配置、多种功能的组合是 zTree 最大优点。

    1、使用zTree一般需要引入下面几个文件：

<link rel="stylesheet" href="../../../css/demo.css" type="text/css"> <link rel="stylesheet" href="../../../css/zTreeStyle/zTreeStyle.css" type="text/css"> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../../../js/jquery-1.4.4.min.js"></script> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../../../js/jquery.ztree.core-3.5.js"></script>

这些文件都可以在http://www.ztree.me下载到。

    2、你需要在你的页面相关位置放上一个div

<div class="zTreeDemoBackground left">      <ul id="addressBook" class="ztree"></ul> </div>

    3、其实树状结构是通过获取JSON。

<SCRIPT type="text/javascript">         <!--         var setting = {             data: {                 simpleData: {                     enable: true                 }             },             callback: {                 onClick: zTreeOnClick             }         };                        var unitinfos = $.parseJSON('${unitinfos}');         for(var i=0;i<unitinfos.length;i++){             if(unitinfos[i].pId=="0"){                 unitinfos[i].icon="${contextPath }/scripts/plugin/zTree/css/zTreeStyle/img/diy/1_open.png";             }             else{                 unitinfos[i].icon="${contextPath }/scripts/plugin/zTree/css/zTreeStyle/img/diy/2.png";             }         }         unitinfos[0].open=true;         var groups = $.parseJSON('${groups}');         unitinfos.push({"id":"600000","pId":"0","name":"客户",                         "icon":"${contextPath }/scripts/plugin/zTree/css/zTreeStyle/img/diy/1_open.png"});         unitinfos.push({"id":"600001","pId":"0","name":"供应商",                         "icon":"${contextPath }/scripts/plugin/zTree/css/zTreeStyle/img/diy/1_open.png"});         unitinfos.push({"id":"600002","pId":"0","name":"人才信息库",                         "icon":"${contextPath }/scripts/plugin/zTree/css/zTreeStyle/img/diy/1_open.png"});                  for(var j=0;j<groups.length;j++){             groups[j].icon="${contextPath }/scripts/plugin/zTree/css/zTreeStyle/img/diy/2.png";         }                           function zTreeOnClick(event, treeId, treeNode) {             var url;             if(treeNode.id=='600000'){                 url="/oa/sys/addressBook!listAddressBookByUnit.do?s_bodytype=2";             }else if(treeNode.id=='600001'){                 url="/oa/sys/addressBook!listAddressBookByUnit.do?s_bodytype=3";             }else if(treeNode.id=='600002'){                 url="/oa/sys/addressBook!listAddressBookByUnit.do?s_bodytype=4";             }else if(treeNode.remark=='group'){                 url="/oa/sys/addressBook!listAddressBookByGroup.do?s_groupid="+treeNode.id;             }else{                               url="/oa/sys/addressBook!listAddressBookByUnit.do?s_unitcode="+treeNode.id+"&s_bodytype=1";             }             $("#addressBookListByUnit").attr("action",url).submit();         };                  $(document).ready(function(){             $.fn.zTree.init($("#addressBook"), setting, unitinfos.concat(groups));         }); </SCRIPT>

其中

$(document).ready(function(){              $.fn.zTree.init($("#addressBook"), setting, unitinfos.concat(groups));  });