1.注意：
测试点击事件时，如果要测试取消选中和追加选中，如果按住ctrl和win键无用，则需要先用鼠标左键按住,然后，在松开左键的前几毫秒按住ctrl键便可！
<!DOCTYPE html>
<script src="bower_components/ztree/js/jquery.ztree.excheck-3.5.js"></script>
<HTML>
<HEAD>
<TITLE> ZTREE DEMO - Standard Data </TITLE>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" href="bower_components/ztree/css/zTreeStyle/zTreeStyle.css" type="text/css">-->
<!--<script type="text/javascript" src="js/jquery-3.3.1.js"></script>-->
<!--<script type="text/javascript" src="bower_components/ztree/js/jquery.ztree.core-3.5.js"></script>-->
<!--<script type="text/javascript" src="bower_components/ztree/js/jquery.ztree.excheck-3.5.js"></script>-->
<!--<script type="text/javascript" src="bower_components/ztree/js/jquery.ztree.exedit-3.5.js"></script>-->
<!--<script type="text/javascript" src="bower_components/ztree/js/jquery.ztree.exhide-3.5.js"></script>-->
<!--<script type="text/javascript" src="bower_components/ztree/js/jquery.ztree.all-3.5.js"></script>-->
<script type="text/javascript" src="js/jquery-3.3.1.js"></script>
<link rel="stylesheet" href="bower_components/ztree/css/zTreeStyle/demo.css" type="text/css">
<link rel="stylesheet" href="bower_components/ztree/css/zTreeStyle/zTreeStyle.css" type="text/css">
<script type="text/javascript" src="bower_components/ztree/js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="bower_components/ztree/js/jquery.ztree.core-3.5.js"></script>
</HEAD>
<BODY>
<div class="content_wrap">
<div class="zTreeDemoBackground left">
<ul id="demo1" class="ztree"></ul>
<ul id="demo2" class="ztree"></ul>
<ul id="demo3" class="ztree"></ul>
</div>
</div>
<SCRIPT type="text/javascript">
var setting1 = {
check: {
enable: true,
chkStyle: "checkbox"
},
view: {
autoCancelSelected:true, //点击节点时，按下 Ctrl 或 Cmd 键是否允许取消选择操作
selectedMulti:true //设置是否允许同时选中多个节点
},
data: {
simpleData: {
enable: true
}
},
callback: {
beforeClick: beforeClick1,
onClick: onClick1
}
};
var setting2 = {
data: {
simpleData: {
enable: true
}
},
callback: {
beforeClick: beforeClick2,
onClick: onClick2
}
};
var setting3 = {
data: {
simpleData: {
enable: true
}
},
callback:{
beforeCollapse: beforeCollapse, //用于捕获父节点折叠之前的事件回调函数，并且根据返回值确定是否允许折叠操作
//返回值是 true / false
//如果返回 false，zTree 将不会折叠节点，也无法触发 onCollapse 事件回调函数
beforeExpand: beforeExpand, //用于捕获父节点展开之前的事件回调函数，并且根据返回值确定是否允许展开操作
//返回值是 true / false
//如果返回 false，zTree 将不会展开节点，也无法触发 onExpand 事件回调函数
onCollapse: onCollapse, //用于捕获节点被折叠的事件回调函数
onExpand: onExpand //用于捕获节点被展开的事件回调函数
}
};
var nodes1 =[
{ id:1, pId:0, name:"普通的父节点",open:true},
{ id:11, pId:1, name:"叶子节点 - 1"},
{ id:12, pId:1, name:"叶子节点 - 2"},
{ id:2, pId:0, name:"NB的父节点",open:true},
{ id:21, pId:2, name:"叶子节点2 - 1"}
];
var nodes2 =[
{ id:1, pId:0, name:"普通的父节点",open:true},
{ id:11, pId:1, name:"叶子节点 - 1"},
{ id:2, pId:0, name:"NB的父节点",open:true},
{ id:21, pId:2, name:"叶子节点2 - 1"}
];
var nodes3 =[
{ id:1, pId:0, name:"父节点1",open:true},
{ id:11, pId:1, name:"叶子节点 - 1"},
{ id:12, pId:1, name:"叶子节点 - 2"},
{ id:13, pId:1, name:"父节点5（无法展开)",expand:false},
{ id:41, pId:13, name:"叶子节点 - 1"},
{ id:42, pId:13, name:"叶子节点 - 2"},
{ id:43, pId:13, name:"叶子节点 - 3"},
{ id:2, pId:0, name:"父节点2",open:true},
{ id:21, pId:2, name:"父结点3(无法折叠)",collapse:false},
{ id:31, pId:21, name:"叶子节点 - 1"},
{ id:32, pId:21, name:"叶子节点 - 2"},
{ id:33, pId:21, name:"叶子节点 - 3"},
];
function beforeClick1(treeId, treeNode, clickFlag) {
alert("点击前: " + treeNode.name + ' clickFlag:' + clickFlag.toString());
}
function onClick1(event, treeId, treeNode, clickFlag) {
alert("点击后: " + " (" + (clickFlag===1 ? "普通选中": (clickFlag===0 ? "取消选中" : "追加选中")) + ") clickFlag:" + clickFlag.toString());
}
function onClick2(event, treeId, treeNode, clickFlag) {
alert("该函数不会被执行");
}
function beforeClick2(treeId, treeNode, clickFlag) {
alert("点击前(不会有点击后,不会被选中): " + treeNode.name + ' clickFlag:' + clickFlag.toString());
return false;
}
function beforeCollapse(treeId, treeNode) {
alert(treeNode.name + '折叠前');
return (treeNode.collapse !== false);
}
function onCollapse(event, treeId, treeNode) {
alert(treeNode.name + '折叠后');
}
function beforeExpand(treeId, treeNode) {
alert(treeNode.name + '展开前');
return (treeNode.expand !== false);
}
function onExpand(event, treeId, treeNode) {
alert(treeNode.name + '展开后');
}
$(document).ready(function(){
$.fn.zTree.init($("#demo1"), setting1, nodes1);
$.fn.zTree.init($("#demo2"), setting2, nodes2);
$.fn.zTree.init($("#demo3"), setting3, nodes3);
$("#expandBtn").bind("click", {type:"expand"}, expandNode);
$("#collapseBtn").bind("click", {type:"collapse"}, expandNode);
$("#toggleBtn").bind("click", {type:"toggle"}, expandNode);
$("#expandSonBtn").bind("click", {type:"expandSon"}, expandNode);
$("#collapseSonBtn").bind("click", {type:"collapseSon"}, expandNode);
$("#expandAllBtn").bind("click", {type:"expandAll"}, expandNode);
$("#collapseAllBtn").bind("click", {type:"collapseAll"}, expandNode);
});
</SCRIPT>
</BODY>
</HTML>