源代码：
左右布局
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Bootstrap 实例 - 下拉菜单（Dropdown）插件方法</title> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <nav class="navbar navbar-default" role="navigation"> <div class="container-fluid"> <div class="navbar-header"> <a class="navbar-brand" href="#">开源教程</a> </div> <div id="myexample"> <ul class="nav navbar-nav"> <li class="active"><a href="#">iOS</a></li> <li><a href="#">SVN</a></li> <li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Java <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a id="action-1" href="#">meter</a></li> <li><a href="#">EJB</a></li> <li><a href="#">Jasper Report</a></li> <li class="divider"></li> <li><a href="#">分离的链接</a></li> <li class="divider"></li> <li><a href="#">另一个分离的链接</a></li> </ul> </li> </ul> </div> </div> </nav> <script> $(function(){ // 默认显示 $(".dropdown-toggle").dropdown('toggle'); }); </script> </body> </html>
运行结果