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下面将展示后台页面的创建及效果图展示：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="static/css/bootstrap.css">
<!-- <link rel="stylesheet" href="static/css/">-->
<title>bootstrap</title>
<style>
.col-md-12 {
padding: 0;
}
.navbar-default {
background-color: lightskyblue;
border-radius: 0;
color: white;
}
.navbar-default .navbar-brand {
color: white;
}
.navbar-default .navbar-nav > li > a {
color: white;
}
.list-group > a {
line-height: 50px;
}
</style>
</head>
<body onload="show(this)">
<div class="container-fluid">
<div class="row">
<div class="col-md-12">
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<a class="navbar-brand" href="#">后台管理系统</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li><a href="#">admin</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">常用操作 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">个人中心</a></li>
<li><a href="#">安全设置</a></li>
<li><a href="#"></a></li>
<li role="separator" class="divider"></li>
<li><a href="#">退出登录</a></li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
</div>
</div>
</div>
<div class="container">
<div class="row">
<div class="col-md-3" >
<div class="list-group" style="margin-top: 55px">
<a href="user.html" class="list-group-item" onclick="show(this);return false">用户管理</a>
<a href="goods.html" class="list-group-item" onclick="show(this);return false">商品管理</a>
<a href="system.html" class="list-group-item" onclick="show(this);return false;">系统设置</a>
</div>
</div>
<div class="col-md-9">
<div class="content" style="min-height: 450px;"></div>
<p class="text-center">茶二网络科技***©版权所有 <br>(208-2020)</p>
</div>
</div>
</div>
<script src="static/js/jquery-3.4.1.js"></script>
<script src="static/js/bootstrap.js"></script>
<script>
function show(ele){
var url=ele.href|| 'welcome.html';
var request=new XMLHttpRequest();
request.onreadystatechange = function () {
if (request.readyState === 4) {
var content = document.getElementsByClassName('content').item(0);
content.innerHTML = request.responseText;
}
};
request.open('GET', url, true);
request.send(null);
}
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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