nav.html

<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="/">Apollo</a>
        </div>

        <!-- Collect the nav links, forms, and other content for toggling -->
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">

            <form class="navbar-form navbar-left" role="search">
                <div class="form-group">
                    <input type="text" class="form-control" placeholder="应用ID/应用名">
                </div>
                <button type="submit" class="btn btn-default">Go</button>
            </form>
            <ul class="nav navbar-nav navbar-right">
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
                       aria-expanded="false">用户 <span class="caret"></span></a>
                    <ul class="dropdown-menu">
                        <li><a href="#">退出</a></li>
                    </ul>
                </li>
            </ul>
        </div>
    </div>
</nav>