1.运行效果如图所示


2.实现代码如下

<!DOCTYPEhtml><html><head><metacharset="utf-8"><metahttp-equiv="X-UA-Compatible"content="IE=edge"><title>表单控件——按钮</title><!--最新版本的Bootstrap核心CSS文件--><linkrel="stylesheet"href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh5u"crossorigin="anonymous"><!--可选的Bootstrap主题文件（一般不用引入）--><linkrel="stylesheet"href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap-theme.min.css"integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp"crossorigin="anonymous"></head><body><formrole="form"><divclass="form-group"><buttonclass="btn"type="button">基础按钮.btn</button><buttonclass="btnbtn-default"type="button">默认按钮.btn-default</button><buttonclass="btnbtn-primary"type="button">主要按钮.btn-primary</button><buttonclass="btnbtn-success"type="button">成功按钮.btn-success</button><buttonclass="btnbtn-info"type="button">信息按钮.btn-info</button><buttonclass="btnbtn-warning"type="button">警告按钮.btn-warning</button><buttonclass="btnbtn-danger"type="button">危险按钮.btn-danger</button><buttonclass="btnbtn-link"type="button">链接按钮.btn-link</button></div></form><scriptsrc="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script><!--最新的Bootstrap核心JavaScript文件--><scriptsrc="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa"crossorigin="anonymous"></script></body></html>