本例子使用json数据,拼接ul和li来实现的

效果图：

1.准备json数据:

复制代码 代码如下:

var menuData = [

{id:0,pid:-1,name:"订购产品",url:"",children:[

{id:1,pid:0,name:"电脑配件",url:"http://www.jb51.net",children:[

{id:20,pid:1,name:"cpu",url:"http://www.jb51.net",children:[

{id:30,pid:20,name:"Intel",url:"http://www.jb51.net",children:[

{id:3000,pid:30,name:"Intel 01",url:""},

{id:3001,pid:30,name:"Intel 02",url:""},

{id:3002,pid:30,name:"Intel 03",url:""},

{id:3003,pid:30,name:"Intel 04",url:""},

{id:3004,pid:30,name:"Intel 05",url:""},

{id:3005,pid:30,name:"Intel 06",url:""},

{id:3006,pid:30,name:"Intel 07",url:""},

{id:3007,pid:30,name:"Intel 08",url:""},

{id:3008,pid:30,name:"Intel 09",url:""}

]},

{id:31,pid:20,name:"AMD",url:"http://www.jb51.net",children:[

{id:3100,pid:31,name:"AMD 01",url:""},

{id:3101,pid:31,name:"AMD 02",url:""},

{id:3102,pid:31,name:"AMD 03",url:""},

{id:3103,pid:31,name:"AMD 04",url:""},

{id:3104,pid:31,name:"AMD 05",url:""},

{id:3105,pid:31,name:"AMD 06",url:""},

{id:3106,pid:31,name:"AMD 07",url:""},

{id:3107,pid:31,name:"AMD 08",url:""},

{id:3108,pid:31,name:"AMD 09",url:""}

]}

]},

{id:21,pid:1,name:"内存",url:"http://www.jb51.net"},

{id:22,pid:1,name:"硬盘",url:"http://www.jb51.net"},

{id:23,pid:1,name:"主板",url:"http://www.jb51.net"},

{id:24,pid:1,name:"显卡",url:"http://www.jb51.net"},

{id:25,pid:1,name:"显示器",url:"http://www.jb51.net"},

{id:26,pid:1,name:"主机箱",url:"http://www.jb51.net"},

{id:27,pid:1,name:"主机箱电源",url:"http://www.jb51.net"},

{id:28,pid:1,name:"键鼠(有线)",url:"http://www.jb51.net"},

{id:29,pid:1,name:"键鼠(无线)",url:"http://www.jb51.net"}

],url:"http://www.jb51.net"},

{id:101,pid:0,name:"监控器材",children:[

{id:102,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:103,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:104,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:112,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:113,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:114,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:115,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:116,pid:101,name:"摄像头",url:"http://www.jb51.net"},

{id:117,pid:101,name:"摄像头",url:"http://www.jb51.net"}

],url:"http://www.jb51.net"},

{id:201,pid:0,name:"数码产品",children:[

{id:202,pid:201,name:"摄像头",url:"http://www.jb51.net"}

],url:"http://www.jb51.net"},

{id:301,pid:0,name:"网络产品",children:[

{id:302,pid:301,name:"摄像头",url:"http://www.jb51.net"}

],url:"http://www.jb51.net"},

{id:401,pid:0,name:"打印耗材",children:[

{id:402,pid:401,name:"打印机",url:"http://www.jb51.net"},

{id:403,pid:401,name:"油墨",url:"http://www.jb51.net"},

{id:404,pid:401,name:"纸张",url:"http://www.jb51.net"},

{id:405,pid:401,name:"摄像头",url:"http://www.jb51.net"},

{id:406,pid:401,name:"摄像头",url:"http://www.jb51.net"},

{id:407,pid:401,name:"摄像头",url:"http://www.jb51.net"},

{id:408,pid:401,name:"摄像头",url:"http://www.jb51.net"}

],url:"http://www.jb51.net"}

]},

{id:1000,pid:-1,name:"我的订单",url:"",children:[

{id:1001,pid:1000,name:"已过期订单",url:""},

{id:1001,pid:1000,name:"已付款订单",url:""}

]},

{id:2000,pid:-1,name:"公司信息",url:"",children:[

{id:2001,pid:2000,name:"最新新闻",url:""},

{id:2002,pid:2000,name:"公司地址",url:""}

]}

];

2.html代码:

复制代码 代码如下:

<div id="menu"><ul id="baseMenu"></ul></div>

3.解析json数据(plugin-menu.js文件):刚学会写jquery插件,写的还比较乱,凑合着看吧

复制代码 代码如下:

(function($){

$.fn.extend({

menu:function(options){

var defaults = {

data:[],

ulId:"baseMenu"

};

var options = $.extend(defaults, options);

// 开始拼接ul,li

$.each(options.data,function(i,v){

var li = $("<li id='"+options.data[i].id+"' name='"+options.data[i].pid+"'></li>");

var _a = $("<a>"+options.data[i].name+"</a>");

_a.attr("href",options.data[i].url)

.appendTo(li);

_each(options.data[i],li);

li.appendTo($("#"+options.ulId));

});

// 给li添加事件

$(this).find("li").hover(function(){

var id = $(this).attr("id");

$(this).find("ul[name='"+id+"']").show();

},function(){

var id = $(this).attr("id");

$(this).find("ul[name='"+id+"']").hide();

});

}

});

})(jQuery);

因为支持无限级,所以肯定会用到递归方法:

复制代码 代码如下:

function _each(data,li){

if(data==undefined||data.children==undefined){

return false;

}

var ul = $("<ul name='"+data.id+"'></ul>");

$.each(data.children,function(i,v){

var _li = $("<li id='"+data.children[i].id+"' name='"+data.children[i].pid+"'></li>");

var _a = $("<a>"+data.children[i].name+"</a>");

_a.attr("href",data.children[i].url)

.attr("target","_blank")

.appendTo(_li);

if(data.children[i].children!=undefined){

_each(data.children[i],_li);

}

_li.appendTo(ul);

});

ul.appendTo(li);

}

4.调用插件:

复制代码 代码如下:

$(function() {

$("#menu").menu({data:menuData,ulId:"baseMenu"});

});

最后,css样式:

复制代码 代码如下:

ul,li{list-style:none;padding:0px;margin:0px;}

#menu *{line-height:30px;}

#menu a{text-decoration:none;}

#menu ul{text-align:left;}

#menu>ul>li{text-align:center;width:80px;float:left;}

#menu>ul>li>a{color:#000;}

#menu>ul>li:hover{background:#F0F0F0;}

#menu>ul>li ul{display:none;width:150px;position:absolute;background:#c1cd94;box-shadow:2px 2px 2px #000;-webkit-box-shadow:2px 2px 2px #000;

-moz-box-shadow:2px 2px 2px #123;}

#menu>ul>li>ul li{padding-left:5px; position:relative;}

#menu>ul>li>ul li>a{color:#000;}

#menu>ul>li>ul li:hover{background:#d3dbb3;}

#menu>ul>li>ul>li ul{left:150px; top:0px;}