bootstarp和jquery的文件别忘了引入
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%--下拉菜单--%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<link href="${pageContext.request.contextPath}/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="stylesheet">
<script src="${pageContext.request.contextPath}/static/common/jquery-2.2.3.min.js"></script>
<script src="${pageContext.request.contextPath}/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
</head>
<body>
<div class="panel panel-default"> <%--这的class样式颜色 还有panel-primary,panel-info,panel-warning等自己尝试--%>
<div class="panel-heading"> <%--标题栏--%>
<h3 class="panel-title">Panel title</h3>
</div>
<div class="panel-body"> <%--内容栏--%>
Panel content
</div>
</div>
<div class="panel panel-success">
<div class="panel-heading">
<h3 class="panel-title">Panel title</h3>
</div>
<div class="panel-body">
Panel content
</div>
</div>
</body>
</html>