效果图：
代码：
<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE> ZTREE DEMO - big data common</TITLE>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<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" src="../../../js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="../../../js/jquery.ztree.core.js"></script>
<script type="text/javascript" src="../../../js/jquery.ztree.excheck.js"></script>
<script type="text/javascript" src="../../../js/jquery.ztree.exedit.js"></script>
<SCRIPT type="text/javascript">
<!--
var setting = {
check: {
enable: true
},
data: {
simpleData: {
enable: true
}
},
callback: {
onNodeCreated: onNodeCreated
}
};
var dataMaker = function(count) {
var nodes = [], pId = -1,
min = 10, max = 90, level = 0, curLevel = [], prevLevel = [], levelCount,
i = 0,j,k,l,m;
while (i<count) {
if (level == 0) {
pId = -1;
levelCount = Math.round(Math.random() * max) + min;
for (j=0; j<levelCount && i<count; j++, i++) {
var n = {id:i, pId:pId, name:"Big-" +i};
nodes.push(n);
curLevel.push(n);
}
} else {
for (l=0, m=prevLevel.length; l<m && i<count; l++) {
pId = prevLevel[l].id;
levelCount = Math.round(Math.random() * max) + min;
for (j=0; j<levelCount && i<count; j++, i++) {
var n = {id:i, pId:pId, name:"Big-" +i};
nodes.push(n);
curLevel.push(n);
}
}
}
prevLevel = curLevel;
curLevel = [];
level++;
}
return nodes;
}
var ruler = {
doc: null,
ruler: null,
cursor: null,
minCount: 5000,
count: 5000,
stepCount:500,
minWidth: 30,
maxWidth: 215,
init: function() {
ruler.doc = $(document);
ruler.ruler = $("#ruler");
ruler.cursor = $("#cursor");
if (ruler.ruler) {
ruler.ruler.bind("mousedown", ruler.onMouseDown);
}
},
onMouseDown: function(e) {
ruler.drawRuler(e, true);
ruler.doc.bind("mousemove", ruler.onMouseMove);
ruler.doc.bind("mouseup", ruler.onMouseUp);
ruler.doc.bind("selectstart", ruler.onSelect);
$("body").css("cursor", "pointer");
},
onMouseMove: function(e) {
ruler.drawRuler(e);
return false;
},
onMouseUp: function(e) {
$("body").css("cursor", "auto");
ruler.doc.unbind("mousemove", ruler.onMouseMove);
ruler.doc.unbind("mouseup", ruler.onMouseUp);
ruler.doc.unbind("selectstart", ruler.onSelect);
ruler.drawRuler(e);
},
onSelect: function (e) {
return false;
},
getCount: function(end) {
var start = ruler.ruler.offset().left+1;
var c = Math.max((end - start), ruler.minWidth);
c = Math.min(c, ruler.maxWidth);
return {width:c, count:(c - ruler.minWidth)*ruler.stepCount + ruler.minCount};
},
drawRuler: function(e, animate) {
var c = ruler.getCount(e.clientX);
ruler.cursor.stop();
if ($.browser.msie || !animate) {
ruler.cursor.css({width:c.width});
} else {
ruler.cursor.animate({width:c.width}, {duration: "fast",easing: "swing", complete:null});
}
ruler.count = c.count;
ruler.cursor.text(c.count);
}
}
var showNodeCount = 0;
function onNodeCreated(event, treeId, treeNode) {
showNodeCount++;
}
function createTree () {
var zNodes = dataMaker(ruler.count);
showNodeCount = 0;
$("#treeDemo").empty();
setting.check.enable = $("#showChk").attr("checked");
var time1 = new Date();
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
var time2 = new Date();
alert("节点共 " + zNodes.length + " 个, 初始化生成 DOM 的节点共 " + showNodeCount + " 个"
+ "\n\n 初始化 zTree 共耗时: " + (time2.getTime() - time1.getTime()) + " ms");
}
$(document).ready(function(){
ruler.init("ruler");
$("#createTree").bind("click", createTree);
});
//-->
</SCRIPT>
</HEAD>
<BODY>
<h1>一次性加载大数据量</h1>
<h6>[ 文件路径: bigdata/common.html ]</h6>
<div class="content_wrap">
<div class="zTreeDemoBackground left">
<ul>
<li><span>调整总节点数，测试加载速度：</span>
<div id="ruler" class="ruler" title="拖拽可调整节点数">
<div id="cursor" class="cursor">5000</div>
</div>
<div style="width:220px; text-align: center;">
<span>checkbox</span><input type="checkbox" id="showChk" title="是否显示 checkbox" class="checkbox first" />
[ <a id="createTree" href="#" title="初始化 zTree" onclick="return false;">初始化 zTree</a> ]
</div>
</li>
</ul>
<ul id="treeDemo" class="ztree"></ul>
</div>
<div class="right">
<ul class="info">
<li class="title"><h2>1、大数据量加载说明</h2>
<ul class="list">
<li>1)、zTree v3.x 针对大数据量一次性加载进行了更深入的优化，实现了延迟加载功能，即不展开的节点不创建子节点的 DOM。</li>
<li class="highlight_red">2)、对于每级节点最多一百左右，但总节点数几千甚至几万，且不是全部展开的数据，一次性加载的效果最明显，速度非常快。</li>
<li class="highlight_red">3)、对于某一级节点数就多达几千的情况 延迟加载无效，这种情况建议考虑分页异步加载。</li>
<li class="highlight_red">4)、对于全部节点都展开显示的情况，延迟加载无效，这种情况建议不要全部展开。</li>
<li>5)、显示 checkbox / radio 会造成一定程度的性能下降。</li>
<li>6)、利用 addDiyDom 功能增加自定义控件会影响速度，影响程度受节点数量而定。</li>
<li>7)、利用 onNodeCreated 事件回调函数对节点 DOM 进行操作会影响速度，影响程度受节点数量而定。</li>
</ul>
</li>
<li class="title"><h2>2、setting 配置信息说明</h2>
<ul class="list">
<li>不需要进行特殊的配置</li>
</ul>
</li>
<li class="title"><h2>3、treeNode 节点数据说明</h2>
<ul class="list">
<li>对 节点数据 没有特殊要求，用户可以根据自己的需求添加自定义属性</li>
</ul>
</li>
</ul>
</div>
</div>
</BODY>
</HTML>
