将组件与Bootstrap对齐
使用实用程序类.navbar-left或.navbar-right在导航栏中将导航链接，表单，按钮或文本之类的组件向左或向右对齐。这两个类都将沿指定方向添加CSS浮点数。
示例
您可以尝试运行以下代码以对齐组件
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Example</title>
<link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet">
<script src = "/scripts/jquery.min.js"></script>
<script src = "/bootstrap/js/bootstrap.min.js"></script>
</head>
<body>
<nav class = "navbar navbar-default" role = "navigation" style="background: orange;">
<div class = "navbar-header">
<a class = "navbar-brand" href = "#">Alignment</a>
</div>
<div>
<!--Left Align-->
<ul class = "nav navbar-nav navbar-left">
<li class = "dropdown">
<a href = "#" class = "dropdown-toggle" data-toggle = "dropdown">
Java
<b class = "caret"></b>
</a>
<ul class = "dropdown-menu">
<li><a href = "#">jmeter</a></li>
<li><a href = "#">EJB</a></li>
<li><a href = "#">Jasper Report</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">
<button type = "submit" class = "btn btn-default">Left align-Submit Button</button>
</form>
<p class = "navbar-text navbar-left">Left align-Text</p>
<!--Right Align-->
<ul class = "nav navbar-nav navbar-right">
<li class = "dropdown">
<a href = "#" class = "dropdown-toggle" data-toggle = "dropdown">
Java
<b class = "caret"></b>
</a>
<ul class = "dropdown-menu">
<li><a href = "#">jmeter</a></li>
<li><a href = "#">EJB</a></li>
<li><a href = "#">Jasper Report</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-right" role = "search">
<button type = "submit" class = "btn btn-default">
Right align-Submit Button
</button>
</form>
<p class = "navbar-text navbar-right">Right align-Text</p>
</div>
</nav>
</body>
</html>