标签：js 异步 javascript ztree.js jquery
后台实现可以参考我以前发表的文章 地区三级联动
zTree API js 下载 点击打开链接
一个效果demo
<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE> ZTREE DEMO - select menu</TITLE>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="js/ztree/css/demo.css" type="text/css">
<link rel="stylesheet" href="js/ztree/css/zTreeStyle/zTreeStyle.css" type="text/css">
<script type="text/javascript" src="js/ztree/js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="js/ztree/js/jquery.ztree.core-3.5.js"></script>
<!-- <script type="text/javascript" src="../../../js/jquery.ztree.excheck-3.5.js"></script>
<script type="text/javascript" src="../../../js/jquery.ztree.exedit-3.5.js"></script>-->
<SCRIPT type="text/javascript">
var setting = {
async: {
enable: true,
url:"/area/getAreas.do",
autoParam:["id=code"],
//autoParam:["id", "name=n", "level=lv"],
//otherParam:{"otherParam":"zTreeAsyncTest"},
//dataFilter: filter,
type: "get"
},
view: {
dblClickExpand: false
},
data: {
simpleData: {
enable: true
}
},
callback: {
beforeClick: beforeClick,
onClick: onClick
}
};
var zNodes;
function beforeClick(treeId, treeNode) {
//var check = (treeNode && !treeNode.isParent);
//if (!check) alert("只能选择城市...");
return true;
}
function onClick(e, treeId, treeNode) {
var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
nodes = zTree.getSelectedNodes(),
v = "";
var code="";
nodes.sort(function compare(a,b){return a.id-b.id;});
for (var i=0, l=nodes.length; i<l; i++) {
//v += nodes[i].name + ",";
v = nodes[i].name;
code=nodes[i].id;
}
if (v.length > 0 ) v = v.substring(0, v.length);//-1
var cityObj = $("#citySel");
cityObj.attr("value", v);
$("#areaCodeV").val(code);
}
//选 择
function showMenu() {
var cityObj = $("#citySel");
var cityOffset = $("#citySel").offset();
$("#menuContent").css({left:cityOffset.left + "px", top:cityOffset.top + cityObj.outerHeight() + "px"}).slideDown("fast");
$("body").bind("mousedown", onBodyDown);
}
function hideMenu() {
$("#menuContent").fadeOut("fast");
$("body").unbind("mousedown", onBodyDown);
}
function onBodyDown(event) {
if (!(event.target.id == "menuBtn" || event.target.id == "menuContent" || $(event.target).parents("#menuContent").length>0)) {
hideMenu();
}
}
$(document).ready(function(){
$.ajax({
url : "/area/getAreas.do",
type : "POST",
dataType : "json",
data : {
code : "P"
},
success : function(returnData, status) {
if (status = "success") {
//alert("returnData:"+returnData);
zNodes = returnData;
//zNodes=dataj;
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
}
}
});
//alert(JSON.stringify(zNodes));
//$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});
//通过等级获取了菜单 , seleId
function getAreas(level) {
var dataj;
$.ajax({
url : "/area/getAreas.do",
type : "POST",
dataType : "json",
data : {
code : level
},
success : function(returnData, status) {
if (status = "success") {
alert("returnData:"+returnData);
var dataj = returnData;
zNodes=dataj;
}
}
});
return dataj;
}
</SCRIPT>
<style type="text/css">
</style>
</HEAD>
<BODY>
<h1>下拉菜单</h1>
<h6>[ 文件路径: super/select_menu.html ]</h6>
<div class="content_wrap">
<div class="zTreeDemoBackground left">
<ul class="list">
<li class="title"> <span class="highlight_red">
选择城市时，按下 Ctrl 或 Cmd 键可以进行多选</span></li>
<li class="title"> 城市：
<input id="citySel" type="text" readonly value="" style="width:120px;"/>
<input id="areaCodeV" type="hidden" >
<a id="menuBtn" href="#" onclick="showMenu(); return false;">选择</a>
</li>
</ul>
</div>
<div class="right">
<ul class="info">
<li class="title"><h2>实现方法说明</h2>
<ul class="list">
<li>用 zTree 实现这种下拉菜单，应该说是比较容易的，你只需要控制 zTree 所在容器的隐藏/显示，以及位置即可。</li>
<li class="highlight_red">zTree v3.x 实现了多点选中功能，因此对于需要多选的下拉菜单也易如反掌。</li>
<li class="highlight_red">利用 setting 的各项配置参数，完全可以满足大部分的功能需求。</li>
</ul>
</li>
</ul>
</div>
</div>
<div id="menuContent" class="menuContent" style="display:none; position: absolute;">
<ul id="treeDemo" class="ztree" style="margin-top:0; width:160px;"></ul>
</div>
<input type="button" id="clickVal" />
<script type="text/javascript">
$(function(){
$("#clickVal").click(function()
{
var vv=$("#citySel").val();
var code=$("#areaCodeV").val();
alert(vv+","+code);
});
})
</script>
</BODY>
</HTML>
<!-- <link rel="stylesheet" href="js/ztree/css/demo.css" type="text/css"> --> <link rel="stylesheet" href="js/ztree/css/zTreeStyle/zTreeStyle.css" type="text/css"> <!-- <script type="text/javascript" src="js/ztree/js/jquery-1.4.4.min.js"></script> --> <script type="text/javascript" src="js/ztree/js/jquery.ztree.core-3.5.js"></script> <script src="js/util/area.js" type="text/javascript"></script>
地区：
<input id="citySel" type="text" readonly value="" style="width:120px;" onclick="showMenu(); return false;"/>
<input id="areaCodeV" type="hidden" >
<div id="menuContent" class="menuContent" style="display:none; position: absolute; background:rgb(194, 220, 237);height:500px;OVERFLOW-Y: auto; OVERFLOW-X:hidden; ">
<a href="javascript:claclArea()">清空</a>
<ul id="treeDemo" class="ztree" style="margin-top:0; width:160px;"></ul>
</div>
var setting = {
async: {
enable: true,
url:"/area/getAreas.do",
autoParam:["id=code"],
//autoParam:["id", "name=n", "level=lv"],
//otherParam:{"otherParam":"zTreeAsyncTest"},
//dataFilter: filter,
type: "get"
},
view: {
dblClickExpand: false
},
data: {
simpleData: {
enable: true
}
},
callback: {
beforeClick: beforeClick,
onClick: onClick
}
};
var zNodes;
function beforeClick(treeId, treeNode) {
//var check = (treeNode && !treeNode.isParent);
//if (!check) alert("只能选择城市...");
return true;
}
function onClick(e, treeId, treeNode) {
var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
nodes = zTree.getSelectedNodes(),
v = "";
var code="";
nodes.sort(function compare(a,b){return a.id-b.id;});
for (var i=0, l=nodes.length; i<l; i++) {
//v += nodes[i].name + ",";
v = nodes[i].name;
code=nodes[i].id;
}
if (v.length > 0 ) v = v.substring(0, v.length);//-1
var cityObj = $("#citySel");
cityObj.attr("value", v);
$("#areaCodeV").val(code);
}
//选 择
function showMenu() {
var cityObj = $("#citySel");
var cityOffset = $("#citySel").offset();
$("#menuContent").css({left:cityOffset.left + "px", top:cityOffset.top + cityObj.outerHeight() + "px"}).slideDown("fast");
$("body").bind("mousedown", onBodyDown);
}
function hideMenu() {
$("#menuContent").fadeOut("fast");
$("body").unbind("mousedown", onBodyDown);
}
function onBodyDown(event) {
if (!(event.target.id == "menuBtn" || event.target.id == "menuContent" || $(event.target).parents("#menuContent").length>0)) {
hideMenu();
}
}
$(document).ready(function(){
$.ajax({
url : "/area/getAreas.do",
type : "POST",
dataType : "json",
data : {
code : "P"
},
success : function(returnData, status) {
if (status = "success") {
//alert("returnData:"+returnData);
zNodes = returnData;
//zNodes=dataj;
$.fn.zTree.init($("#treeDemo"), setting, zNodes);
}
}
});
//alert(JSON.stringify(zNodes));
//$.fn.zTree.init($("#treeDemo"), setting, zNodes);
});
//通过等级获取了菜单 , seleId
function getAreas(level) {
var dataj;
$.ajax({
url : "/area/getAreas.do",
type : "POST",
dataType : "json",
data : {
code : level
},
success : function(returnData, status) {
if (status = "success") {
alert("returnData:"+returnData);
var dataj = returnData;
zNodes=dataj;
}
}
});
return dataj;
}
//清空
function claclArea()
{
$("#citySel").val('');
$("#areaCodeV").val('');
}标签：js 异步 javascript ztree.js jquery
原文地址：http://blog.csdn.net/liangrui1988/article/details/43984199
