转自：http://www.jb51.net/article/71615.htm 侵删
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
body{
padding:0;
margin:0;
}
ul{
padding: 0;
margin:0;
}
.navlist {
/*margin-left: -30px;*/
}
.navlist div {
padding-left: 15px;
}
.navlist div ul {
overflow: hidden;
display: none;
height: auto;
}
.navlist span {
display: block;
height: 25px;
line-height: 25px;
padding-left: 5px;
margin: 1px 0;
cursor: pointer;
border-bottom: 1px solid #CCC;
}
.navlist span:hover {
background-color: #e6e6e6;
color: #cf0404;
}
.navlist a {
color: #333;
text-decoration: none;
}
.navlist a:hover {
color: #06F;
}
.btn {
height: 30px;
margin-top: 10px;
border-bottom: 1px solid #CCC;
}
</style>
</head>
<div class="btn">
<input name="" type="button" id="btn_open" value="全部展开" />
<input name="" type="button" id="btn_close" value="全部收缩" />
</div>
<div id="navlist" class="navlist"></div>
<body>
<!-- <div id="menu"></div> -->
<script src="https://cdn.bootcss.com/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript">
var json = [{
"id": 1,
"name": "系统管理", // 菜单名称
"url": "#", //映射URL
"icon": "sys-icon", //图标样式
"pid": 0, //父菜单ID
"items": []
}, {
"id": 1,
"name": "系统管理1", // 菜单名称
"url": "#", //映射URL
"icon": "sys-icon", //图标样式
"pid": 0, //父菜单ID
"items": null
}, {
"id": 5,
"name": "测试菜单1",
"url": "#",
"icon": "sys-icon",
"pid": 1,
"items": [{
"name": "测试菜单1-1",
"url": "#", //映射URL
}, {
"name": "测试菜单1-2",
"items": [{
"name": "测试菜单1-2-1",
"url": "#", //映射URL
}, {
"name": "测试菜单1-2-2",
"url": "#", //映射URL
}, {
"name": "测试菜单1-2-3",
"url": "#", //映射URL
}]
}, ]
}, {
"id": 5,
"name": "测试菜单2",
"url": "#",
"icon": "sys-icon",
"pid": 1,
"items": [{
"name": "测试菜单2-1",
"url": "#", //映射URL
}, {
"name": "测试菜单2-2",
"url": "#", //映射URL
}]
}, {
"name": "测试菜单3",
"items": [{
"name": "测试菜单3-1",
"url": "#", //映射URL
items: [{
"name": "测试菜单3-1-1",
"url": "#", //映射URL
}]
}, {
"name": "测试菜单3-2",
"url": "#", //映射URL
items: [{
"name": "测试菜单3-2-1",
"url": "#", //映射URL
}]
}, {
"name": "测试菜单3-3",
"url": "#", //映射URL
}]
}, {
"name": "测试菜单4",
}, {
"name": "测试菜单5",
}]
console.log(json)
/*递归实现获取无级树数据并生成DOM结构*/
var str = "";
var forTree = function(o) {
for (var i = 0; i < o.length; i++) {
var urlstr = "";
try {
if (typeof o[i]["url"] == "undefined") {
urlstr = "<div><span>" + o[i]["name"] + "</span><ul>";
} else {
urlstr = "<div><span><a href=" + o[i]["url"] + ">" + o[i]["name"] + "</a></span><ul>";
}
str += urlstr;
if (o[i].items != null) {
forTree(o[i].items);
}
str += "</ul></div>";
} catch (e) {}
}
// console.log(str);
return str;
}
/*添加无级树*/
document.getElementById("navlist").innerHTML = forTree(json);
/*树形菜单*/
var menuTree = function() {
//给有子对象的元素加[+-]
$("#navlist ul").each(function(index, element) {
// console.log(index, element);
var ulContent = $(element).html();
var spanContent = $(element).siblings("span").html();
if (ulContent) {
$(element).siblings("span").html("[+] " + spanContent)
}
});
$("#navlist").find("div span").click(function() {
var ul = $(this).siblings("ul");
var spanStr = $(this).html();
var spanContent = spanStr.substr(3, spanStr.length);
if (ul.find("div").html() != null) {
if (ul.css("display") == "none") {
ul.show(300);
$(this).html("[-] " + spanContent);
} else {
ul.hide(300);
$(this).html("[+] " + spanContent);
}
}
})
}()
/*展开*/
$("#btn_open").click(function() {
$("#navlist ul").show(300);
curzt("-");
})
/*收缩*/
$("#btn_close").click(function() {
$("#navlist ul").hide(300);
curzt("+");
})
function curzt(v) {
$("#navlist span").each(function(index, element) {
var ul = $(this).siblings("ul");
var spanStr = $(this).html();
var spanContent = spanStr.substr(3, spanStr.length);
if (ul.find("div").html() != null) {
$(this).html("[" + v + "] " + spanContent);
}
});
}
</script>
</body>
</html>
