<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8"> 
        <title>Bootstrap 实例 - 基本表单</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>

        <form role="form">
            <div class="form-group">
                <label for="name">名称</label>
                <input type="text" class="form-control" id="name" 
                       placeholder="请输入名称">
            </div>
            <div class="form-group">
                <label for="inputfile">文件输入</label>
                <input type="file" id="inputfile">
                <p class="help-block">这里是块级帮助文本的实例。</p>
            </div>
            <div class="checkbox">
                <label>
                    <input type="checkbox"> 请打勾
                </label>
            </div>
            <button type="submit" class="btn btn-default">提交</button>
        </form>

    </body>
</html>