https://blog.****.net/nb7474/article/details/79413460/
效果：
项目结构：
后台返回的菜单栏数据结构：
数据：
{
"code": 0,
"msg": "成功",
"data": [{
"menuId": 1,
"parentId": 0,
"name": "系统管理",
"url": null,
"perms": null,
"type": 0,
"icon": "system",
"orderNum": 0,
"open": null,
"list": [{
"menuId": 2,
"parentId": 1,
"name": "管理员列表",
"url": "sys/user",
"perms": null,
"type": 1,
"icon": "admin",
"orderNum": 1,
"open": null,
"list": [{
"menuId": 15,
"parentId": 2,
"name": "查看",
"url": null,
"perms": "sys:user:list,sys:user:info",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 16,
"parentId": 2,
"name": "新增",
"url": null,
"perms": "sys:user:save,sys:role:select",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 17,
"parentId": 2,
"name": "修改",
"url": null,
"perms": "sys:user:update,sys:role:select",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 18,
"parentId": 2,
"name": "删除",
"url": null,
"perms": "sys:user:delete",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}]
}, {
"menuId": 3,
"parentId": 1,
"name": "角色管理",
"url": "sys/role",
"perms": null,
"type": 1,
"icon": "role",
"orderNum": 2,
"open": null,
"list": [{
"menuId": 19,
"parentId": 3,
"name": "查看",
"url": null,
"perms": "sys:role:list,sys:role:info",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 20,
"parentId": 3,
"name": "新增",
"url": null,
"perms": "sys:role:save,sys:menu:list",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 21,
"parentId": 3,
"name": "修改",
"url": null,
"perms": "sys:role:update,sys:menu:list",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 22,
"parentId": 3,
"name": "删除",
"url": null,
"perms": "sys:role:delete",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}]
}, {
"menuId": 4,
"parentId": 1,
"name": "菜单管理",
"url": "sys/menu",
"perms": null,
"type": 1,
"icon": "menu",
"orderNum": 3,
"open": null,
"list": [{
"menuId": 23,
"parentId": 4,
"name": "查看",
"url": null,
"perms": "sys:menu:list,sys:menu:info",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 24,
"parentId": 4,
"name": "新增",
"url": null,
"perms": "sys:menu:save,sys:menu:select",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 25,
"parentId": 4,
"name": "修改",
"url": null,
"perms": "sys:menu:update,sys:menu:select",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 26,
"parentId": 4,
"name": "删除",
"url": null,
"perms": "sys:menu:delete",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}]
}, {
"menuId": 5,
"parentId": 1,
"name": "SQL监控",
"url": "http://localhost:8080/renren-fast/druid/sql.html",
"perms": null,
"type": 1,
"icon": "sql",
"orderNum": 4,
"open": null,
"list": null
}, {
"menuId": 6,
"parentId": 1,
"name": "定时任务",
"url": "job/schedule",
"perms": null,
"type": 1,
"icon": "job",
"orderNum": 5,
"open": null,
"list": [{
"menuId": 7,
"parentId": 6,
"name": "查看",
"url": null,
"perms": "sys:schedule:list,sys:schedule:info",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 8,
"parentId": 6,
"name": "新增",
"url": null,
"perms": "sys:schedule:save",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 9,
"parentId": 6,
"name": "修改",
"url": null,
"perms": "sys:schedule:update",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 10,
"parentId": 6,
"name": "删除",
"url": null,
"perms": "sys:schedule:delete",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 11,
"parentId": 6,
"name": "暂停",
"url": null,
"perms": "sys:schedule:pause",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 12,
"parentId": 6,
"name": "恢复",
"url": null,
"perms": "sys:schedule:resume",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 13,
"parentId": 6,
"name": "立即执行",
"url": null,
"perms": "sys:schedule:run",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}, {
"menuId": 14,
"parentId": 6,
"name": "日志列表",
"url": null,
"perms": "sys:schedule:log",
"type": 2,
"icon": null,
"orderNum": 0,
"open": null,
"list": null
}]
}, {
"menuId": 27,
"parentId": 1,
"name": "参数管理",
"url": "sys/config",
"perms": "sys:config:list,sys:config:info,sys:config:save,sys:config:update,sys:config:delete",
"type": 1,
"icon": "config",
"orderNum": 6,
"open": null,
"list": null
}, {
"menuId": 29,
"parentId": 1,
"name": "系统日志",
"url": "sys/log",
"perms": "sys:log:list",
"type": 1,
"icon": "log",
"orderNum": 7,
"open": null,
"list": null
}, {
"menuId": 30,
"parentId": 1,
"name": "文件上传",
"url": "oss/oss",
"perms": "sys:oss:all",
"type": 1,
"icon": "oss",
"orderNum": 6,
"open": null,
"list": null
}]
}]
}
说明：有三级菜单数据，我只生成两级菜单（增删改查菜单不生成了）
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>管理平台</title>
<meta name="renderer" content="webkit|ie-comp|ie-stand">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta http-equiv="Cache-Control" content="no-siteapp" />
<link rel="stylesheet" href="layui/css/layui.css" />
<style>
iframe{
width: 100%;
height: 100%;
}
</style>
</head>
<body class="layui-layout-body">
<div class="layui-layout layui-layout-admin">
<div class="layui-header">
<div class="layui-logo">layui 后台布局</div>
<ul class="layui-nav layui-layout-left">
</ul>
<ul class="layui-nav layui-layout-right">
<li class="layui-nav-item">
<a href="javascript:;">
<img src="http://t.cn/RCzsdCq" class="layui-nav-img">
贤心
</a>
<dl class="layui-nav-child">
<dd><a href="">基本资料</a></dd>
<dd><a href="">安全设置</a></dd>
</dl>
</li>
<li class="layui-nav-item"><a href="">退了</a></li>
</ul>
</div>
<div class="layui-side layui-bg-black">
<div class="layui-side-scroll">
<!-- 左侧导航区域（可配合layui已有的垂直导航） -->
<ul id="left_nav" class="layui-nav layui-nav-tree" lay-filter="test">
<!--<li class="layui-nav-item layui-nav-itemed">
<a class="" href="javascript:;">系统管理</a>
<dl class="layui-nav-child">
<dd><a href="javascript:;">用户管理</a></dd>
<dd><a href="javascript:;">角色管理</a></dd>
<dd><a href="javascript:;">权限管理</a></dd>
<dd><a href="">菜单管理</a></dd>
</dl>
</li>-->
</ul>
</div>
</div>
<div class="layui-body" style="overflow-y: hidden;">
<!-- 内容主体区域 -->
<div class="layui-tab" lay-filter="demo" lay-allowClose="true">
<ul class="layui-tab-title">
<!--<li class="layui-this" lay-id="111" >系统管理</li>
<li lay-id="222">角色管理</li>
<li lay-id="333">权限分配</li>
<li lay-id="444">用户管理</li>
<li lay-id="555">订单管理</li>-->
</ul>
<div class="layui-tab-content" >
<!--<div class="layui-tab-item layui-show">1</div>
<div class="layui-tab-item">
<iframe src="pages/sys/role.html"></iframe>
</div>
<div class="layui-tab-item">3</div>
<div class="layui-tab-item">
<iframe src="pages/sys/user.html"></iframe>
</div>
<div class="layui-tab-item">5</div>-->
</div>
</div>
</div>
<div class="layui-footer">
<!-- 底部固定区域 -->
© layui.com - 底部固定区域
</div>
</div>
<script type="text/javascript" src="js/jquery-1.9.1.min.js" ></script>
<script src="layui/layui.js"></script>
<script>
var base="http://localhost:8763";
var get_nav=base+"/sys/menu/list";
var layer;
network();
/*
* @todo 重新计算iframe高度
*/
function FrameWH() {
var h = $(window).height() - 164;
//console.log("高度问题=="+h);
$("iframe").css("height", h + "px");
}
function network(){
$.ajax({
url:get_nav,
type: "get",
contentType: "application/json",
dataType: 'json',
async: true,
success: function(res) {
//console.log("首页请求结果=="+JSON.stringify(res));
if (res.code===0) {
console.log("请求数据成功");
loadnav(res.data);
} else{
layer.msg('暂无数据');
}
},
error:function() {
layer.msg("请求失败！");
}
});
}
function loadnav (navdata) {
for (var i=0;i<navdata.length;i++) {
var first_menu=navdata[i];
var childMenus=first_menu.list;
//console.log("子菜单=="+JSON.stringify(childMenus));
if(childMenus==null||childMenus==undefined||childMenus==""){
//console.log("没有子菜单=="+first_menu.name);
loadTopMenu(first_menu);
}else{
//console.log("有子菜单=="+first_menu.name);
loadHasChildMenu(first_menu);
}
}
//列表添加完后再次执行渲染
xuanran();
}
//加载带有子菜单的
function loadHasChildMenu(data){
var fragment = document.getElementById("left_nav");
var list = document.createElement('li');
list.className="layui-nav-item layui-nav-itemed";
var child_one_Html='<a href="javascript:;">'+data.name+'</a>';
var childmenus=data.list;
var child_two_Html='<dl class="layui-nav-child">';
var childHtmls="";
for (var i=0;i<childmenus.length;i++) {
var childmenu=childmenus[i];
var childHtml='<dd><a class="site-demo-active" data-title='+childmenu.name+' data-menuId='+childmenu.menuId+' data-src='+childmenu.url+'>'+childmenu.name+'</a></dd>';
childHtmls+=childHtml;
}
child_two_Html +=childHtmls+'</dl>';
list.innerHTML=child_one_Html+child_two_Html;
fragment.appendChild(list);
console.log("2.=多级菜单列表加载完毕");
}
//加载*菜单(没有子菜单)
function loadTopMenu(data){
var fragment = document.getElementById("left_nav");
var list = document.createElement('li');
list.className="layui-nav-item";
list.innerHTML='<a class="site-demo-active" data-title='+data.name+' data-menuId='+data.menuId+' data-src='+data.url+'>'+data.name+'</a>';
fragment.appendChild(list);
console.log("1.=*菜单列表加载完毕");
}
function xuanran() {
layui.use(['element','layer'], function(){
var element = layui.element;
layer=layui.layer;
var layFilter = $("#left_nav").attr('lay-filter');
element.render('nav', layFilter);
var active = {
//在这里给active绑定几项事件，后面可通过active调用这些事件
tabAdd: function (url, id, name) {
//新增一个Tab项 传入三个参数，分别对应其标题，tab页面的地址，还有一个规定的id，是标签中data-id的属性值
var body_url="pages/"+url+".html";
console.log("要切换的页面地址="+body_url);
element.tabAdd('demo', {
title: name,
content: '<iframe data-frameid="' + id + '" scrolling="auto" frameborder="0" src="' + body_url + '"></iframe>',
id: id //规定好的id
})
FrameWH(); //计算ifram层的大小
},
tabChange: function (id) {
//切换到指定Tab项
element.tabChange('demo', id); //根据传入的id传入到指定的tab项
},
tabDelete: function (id) {
element.tabDelete("demo", id);//删除
}
};
// //当点击有site-demo-active属性的标签时，即左侧菜单栏中内容 ，触发点击事件
$('.site-demo-active').on('click', function () {
var dataid = $(this);
if ($(".layui-tab-title li[lay-id]").length <= 0) {
//如果比零小，则直接打开新的tab项
console.log("没有tab页，新建tab页");
active.tabAdd(dataid.attr("data-src"), dataid.attr("data-menuId"),dataid.attr("data-title"));
} else {
//否则判断该tab项是否以及存在
var isData = false; //初始化一个标志，为false说明未打开该tab项 为true则说明已有
$.each($(".layui-tab-title li[lay-id]"), function () {
//如果点击左侧菜单栏所传入的id 在右侧tab项中的lay-id属性可以找到，则说明该tab项已经打开
if ($(this).attr("lay-id") == dataid.attr("data-menuId")) {
console.log("如果点击左侧菜单栏所传入的id 在右侧tab项中的lay-id属性可以找到，则说明该tab项已经打开");
isData = true;
}
})
if (isData == false) {
//标志为false 新增一个tab项
console.log("新增一个tab项")
active.tabAdd(dataid.attr("data-src"), dataid.attr("data-menuId"),dataid.attr("data-title"));
}
}
//最后不管是否新增tab，最后都转到要打开的选项页面上
active.tabChange(dataid.attr("data-menuId"));
});
})
console.log("==列表添加完后再次执行渲染");
}
</script>
</body>
</html>