```html <div class="navbar navbar-default"> <!-- navbar-header --> <div class="navbar-header"> <a href="#" class="navbar-brand">极客营</a> </div> <!--navbar-nav --> <ul class="nav navbar-nav"> <li><a href="#">JAVA</a></li> <li><a href="#">PHP</a></li> <li><a href="#">HTML5</a></li> </ul> <!-- navbar-form --> <form action="" class="navbar-form navbar-right"> <div class="form-group"> <input type="text" class="form-control"> </div> <button class="btn btn-default">搜索</button> </form> </div> ```