bootstrap介绍
详情见：bootstrap
布局容器
使用前端框架，所有标签样式的调整，全都是通过class属性值来的
<div class="container"></div> 左右两边留白 <div class="container-fluid"></div> 全屏显示
格栅系统
<div class="row c1"></div>
一个row就是一行，每个row默认会分成12份，通过class="col-md-num"来选择你想要占几份
根据浏览器窗口的不同，采取不同的布局方式，进行响应式布局，
col-md-num进行PC端布局，col-sm-num进行移动端布局
@media screen and (max-width: 700px){
.c1 {
height: 50px;
background-color: yellow;
border: 3px solid blue;
}
当浏览器窗口宽度为700px时，颜色会变为黄色，这也是响应式布局
栅格系统参数 xs sm md lg
表格
常见参数：
<table class="table table-striped table-bordered table-hover">
table-striped 条纹状表格
table-bordered 带边框的表格
table-hover 鼠标悬停
表单
表单加样式，记住一个参数：form-control
按钮组
btn btn-颜色
小练习：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<link rel="stylesheet" href="font-awesome-4.7.0/font-awesome.min.css">
<link href="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.bootcss.com/twitter-bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>
<!--导航条开始-->
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">图书管理系统</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">
<li class="active"><a href="#">图书<span class="sr-only">(current)</span></a></li>
<li><a href="#">作者</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
aria-expanded="false">更多 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<form class="navbar-form navbar-left">
<div class="form-group">
<input type="text" class="form-control" placeholder="关键字">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Assassin</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
aria-expanded="false">更多 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
<!--导航条结束-->
<div class="container">
<div class="row">
<div class="col-md-3">
<div class="list-group">
<a href="#" class="list-group-item active">
首页
</a>
<a href="#" class="list-group-item">图书列表</a>
<a href="#" class="list-group-item">作者列表</a>
<a href="#" class="list-group-item">出版社</a>
<a href="#" class="list-group-item">更多</a>
</div>
</div>
<div class="col-md-9">
<div class="panel panel-primary">
<div class="panel-heading">图书管理系统 <span class="glyphicon glyphicon-book pull-right"></span></div>
<div class="panel-body">
<form class="form-inline">
<div class="form-group">
<label class="sr-only" for="exampleInputAmount">Amount (in dollars)</label>
<div class="input-group">
<input type="text" class="form-control" id="exampleInputAmount" placeholder="关键字">
</div>
</div>
<button type="submit" class="btn btn-primary">搜素</button>
<a href="" class="btn btn-primary pull-right">新增</a>
</form>
<br>
<br>
<table class="table table-hover table-bordered table-striped">
<thead>
<tr class="success">
<th>序号</th>
<th>书名</th>
<th>作者</th>
<th>价格</th>
<th>出版社</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
<tbody>
<tr>
<td>1</td>
<td>人间失格</td>
<td>太宰治</td>
<td>89.98</td>
<td>南方出版社</td>
<td>
<a href="" class="btn btn-primary btn-sm">编辑</a>
<a href="" class="btn btn-danger btn-sm">删除</a>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
</div>
</body>
</html>