首先包我导入，路径也没问题！求上上签，解答
代码如下：
<link herf="/tencent/css/bootstrap.css" type="text/css" rel="stylesheet"/>
<script type="text/javascript" src="/tencent/js/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="/tencent/js/bootstrap.js"></script>
<body>
<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
顶部
</div>
<nav class="navbar navbar-default navbar-fixed-bottom" role="navigation">
底部
</nav>
</body>
herf？是href吧
<link href="/tencent/css/bootstrap.css" type="text/css" rel="stylesheet"/>
清理浏览器缓存，看代码没问题