我的JSP的HelloWorld

在4317机房，跟着小海写下第一个JSP。

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">

		<title>My JSP 'a.jsp' starting page</title>

		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

	</head>

	<body>
		<%
			double r, s;
			String radius = request.getParameter("radius");
			if (radius == null)
				s = 0;
			else {
				r = Double.parseDouble(radius);
				s = 3.14159*r*r;
			}
		%>
		<font size=6 color=red>圆面积计算</font>
		<form action="" method="post" name=f1>
			请输入半径
			<input type=text name=radius value="0" size=5 />
			面积=
			<input type=text name=area value="0" size=5 />
			<input type="submit" value="计算" />
		</form>
	</body>
</html>
<script language="javascript">
document.f1.area.value="<%=s%>";
document.f1.radius.value="<%=radius%>";
</script>

 

posted @ 2014-03-03 22:05  真实姓名  阅读(370)  评论(0)    收藏  举报