代码如下：
<div class="container"> <div class="row"><!--按钮的背景颜色--> <button type="button" class="btn btn-default">chaixingsi</button> <button type="button" class="btn btn-PRimary">chaixingsi</button> <button type="button" class="btn btn-success">chaixingsi</button> <button type="button" class="btn btn-info">chaixingsi</button> <button type="button" class="btn btn-warning">chaixingsi</button> <button type="button" class="btn btn-danger">chaixingsi</button> <button type="button" class="btn btn-link">chaixingsi</button> </div> <div class="row" style="margin-top: 20px"><!--按钮的尺寸--> <button type="button" class="btn btn-default btn-lg">chaixingsi</button> <button type="button" class="btn btn-primary btn-md">chaixingsi</button> <button type="button" class="btn btn-success btn-sm">chaixingsi</button> <button type="button" class="btn btn-info btn-xs">chaixingsi</button> </div> <div class="row" style="margin-top: 20px"><!--让按钮的宽度变为100%，并且变为块级元素--> <button type="button" class="btn btn-success btn-block">chaixingsi</button> </div> <div class="row" style="margin-top: 20px"> <a href="#" class="btn btn-success active">chaixingsi</a><!--a标签也可以成为按钮，加上active变为激活状态--> <button type="button" class="btn btn-info disabled">chaixingsi</button><!--禁用按钮--> <button type="button" class="btn btn-info" disabled>chaixingsi</button><!--和上一句比较禁用的不同--> </div> </div>运行结果： 
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