下载地址：http://v3.bootcss.com/getting-started/#download
HTML模板：
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap 模板</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 引入 Bootstrap -->
<link href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<!-- HTML5 Shim 和 Respond.js 用于让 IE8 支持 HTML5元素和媒体查询 -->
<!-- 注意： 如果通过 file:// 引入 Respond.js 文件，则该文件无法起效果 -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
<![endif]-->
</head>
<body>
<h1>Hello, world!</h1>
<!-- jQuery (Bootstrap 的 JavaScript 插件需要引入 jQuery) -->
<script src="https://code.jquery.com/jquery.js"></script>
<!-- 包括所有已编译的插件 -->
<script src="js/bootstrap.min.js"></script>
</body>
</html>
在这里，您可以看到包含了 jquery.js、bootstrap.min.js 和 bootstrap.min.css 文件，用于让一个常规的 HTML 文件变为使用了 Bootstrap 的模板。
Bootstrap CDN推荐
百度的静态资源库的 CDN 服务，引入代码如下：
<!-- 新 Bootstrap 核心 CSS 文件 --><link href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <!-- 可选的Bootstrap主题文件（一般不使用） --><script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap-theme.min.css"></script> <!-- jQuery文件。务必在bootstrap.min.js 之前引入 --><script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script> <!-- 最新的 Bootstrap 核心 JavaScript 文件 --><script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
可视化布局：
代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>bootstraptest</title>
<!-- 新 Bootstrap 核心 CSS 文件 --><link href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<!-- 可选的Bootstrap主题文件（一般不使用） --><script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap-theme.min.css"></script>
<!-- jQuery文件。务必在bootstrap.min.js 之前引入 --><script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- 最新的 Bootstrap 核心 JavaScript 文件 --><script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script> </head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="row">
<div class="col-md-4">
<div class="thumbnail">
<img alt="300x200" src="img/ad.jpg" class="img-responsive" />
<div class="caption">
<h3>
Thumbnail label
</h3>
<p>
Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.
</p>
<p>
<a class="btn btn-primary" href="#">Action</a> <a class="btn" href="#">Action</a>
</p>
</div>
</div>
</div>
<div class="col-md-4">
<div class="thumbnail">
<img alt="300x200" src="v3/default5.jpg" />
<div class="caption">
<h3>
Thumbnail label
</h3>
<p>
Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.
</p>
<p>
<a class="btn btn-primary" href="#">Action</a> <a class="btn" href="#">Action</a>
</p>
</div>
</div>
</div>
<div class="col-md-4">
<div class="thumbnail">
<img alt="300x200" src="v3/default6.jpg" />
<div class="caption">
<h3>
Thumbnail label
</h3>
<p>
Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.
</p>
<p>
<a class="btn btn-primary" href="#">Action</a> <a class="btn" href="#">Action</a>
</p>
</div>
</div>
</div>
</div> <a id="modal-989545" href="#modal-container-989545" role="button" class="btn" data-toggle="modal">触发遮罩窗体</a>
<div class="modal fade" id="modal-container-989545" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title" id="myModalLabel">
标题
</h4>
</div>
<div class="modal-body">
内容...asdfasdf
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">关闭</button> <button type="button" class="btn btn-primary">保存</button>
</div>
</div>
</div>
</div>
<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title">
Panel title
</h3>
</div>
<div class="panel-body">
Panel content
</div>
<div class="panel-footer">
Panel footer
</div>
</div>
<div class="page-header">
<h1>
Example page header <small>Subtext for header</small>
</h1>
</div>
<div class="btn-group">
<button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-left"></em> 左</button> <button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-center"></em> 中</button> <button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-right"></em> 右</button> <button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-justify"></em> 全</button>
</div>
<div class="row clearfix">
<div class="col-md-12 column">
<div class="jumbotron">
<h1>
Hello, world!
</h1>
<p>
This is a template for a simple marketing or informational website. It includes a large callout called the hero unit and three supporting pieces of content. Use it as a starting point to create something more unique.
</p>
<p>
<a class="btn btn-primary btn-large" href="#">Learn more</a>
</p>
</div>
</div>
</div>
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> <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="#">Brand</a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active">
<a href="#">Link</a>
</li>
<li>
<a href="#">Link</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown<strong class="caret"></strong></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 class="divider">
</li>
<li>
<a href="#">Separated link</a>
</li>
<li class="divider">
</li>
<li>
<a href="#">One more separated link</a>
</li>
</ul>
</li>
</ul>
<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<input class="form-control" type="text" />
</div> <button type="submit" class="btn btn-default">Submit</button>
</form>
<ul class="nav navbar-nav navbar-right">
<li>
<a href="#">Link</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown<strong class="caret"></strong></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 class="divider">
</li>
<li>
<a href="#">Separated link</a>
</li>
</ul>
</li>
</ul>
</div>
</nav>
<h2>
Heading
</h2>
<p>
Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui.
</p>
<p>
<a class="btn" href="#">View details »</a>
</p>
<div class="jumbotron">
<h1>
Hello, world!
</h1>
<p>
This is a template for a simple marketing or informational website. It includes a large callout called the hero unit and three supporting pieces of content. Use it as a starting point to create something more unique.
</p>
<p>
<a class="btn btn-primary btn-large" href="#">Learn more</a>
</p>
</div> <address> <strong>Twitter, Inc.</strong><br /> 795 Folsom Ave, Suite 600<br /> San Francisco, CA 94107<br /> <abbr title="Phone">P:</abbr> (123) 456-7890</address>
<div class="btn-group">
<button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-left"></em> 左</button> <button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-center"></em> 中</button> <button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-right"></em> 右</button> <button class="btn btn-default" type="button"><em class="glyphicon glyphicon-align-justify"></em> 全</button>
</div>
</div>
</div>
<div class="row clearfix">
<div class="col-md-4 column">
</div>
<div class="col-md-4 column">
<h2>
Heading
</h2>
<p>
Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui.
</p>
<p>
<a class="btn" href="#">View details »</a>
</p>
</div>
<div class="col-md-4 column">
<h2>
Heading
</h2>
<p>
Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui.
</p>
<p>
<a class="btn" href="#">View details »</a>
</p>
</div>
</div>
</div>
</body>
</html>
效果如下：
参考：
http://www.runoob.com/bootstrap/bootstrap-environment-setup.html