JSP 页面包含计算圆形和梯形面积
使用 JSP 页面包含计算圆形和梯形面积
本示例展示了使用 JSP 页面包含 (include) 功能，通过 main.jsp 页面加载 circle.jsp 和 ladder.jsp 页面，并分别计算并显示圆形和梯形的面积。
main.jsp 页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Main</title>
</head>
<body>
<h1>Main Page</h1>
<jsp:include page="circle.jsp">
<jsp:param name="radius" value="5" />
</jsp:include>
<jsp:include page="ladder.jsp">
<jsp:param name="upperBase" value="8" />
<jsp:param name="lowerBase" value="12" />
<jsp:param name="height" value="6" />
</jsp:include>
</body>
</html>
circle.jsp 页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.text.DecimalFormat" %>
<%@ page import="java.math.BigDecimal" %>
<%
String radiusStr = request.getParameter("radius");
double radius = Double.parseDouble(radiusStr);
double area = Math.PI * Math.pow(radius, 2);
BigDecimal areaDecimal = new BigDecimal(area);
areaDecimal = areaDecimal.setScale(2, BigDecimal.ROUND_HALF_UP);
DecimalFormat df = new DecimalFormat("#0.00");
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Circle</title>
</head>
<body>
<h2>Circle Area</h2>
<p>Radius: <%= radius %></p>
<p>Area: <%= df.format(areaDecimal) %></p>
</body>
</html>
ladder.jsp 页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.text.DecimalFormat" %>
<%@ page import="java.math.BigDecimal" %>
<%
String upperBaseStr = request.getParameter("upperBase");
String lowerBaseStr = request.getParameter("lowerBase");
String heightStr = request.getParameter("height");
double upperBase = Double.parseDouble(upperBaseStr);
double lowerBase = Double.parseDouble(lowerBaseStr);
double height = Double.parseDouble(heightStr);
double area = (upperBase + lowerBase) * height / 2;
BigDecimal areaDecimal = new BigDecimal(area);
areaDecimal = areaDecimal.setScale(2, BigDecimal.ROUND_HALF_UP);
DecimalFormat df = new DecimalFormat("#0.00");
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Ladder</title>
</head>
<body>
<h2>Ladder Area</h2>
<p>Upper Base: <%= upperBase %></p>
<p>Lower Base: <%= lowerBase %></p>
<p>Height: <%= height %></p>
<p>Area: <%= df.format(areaDecimal) %></p>
</body>
</html>
将以上三个 jsp 文件保存在 web 服务目录中，然后访问 main.jsp 页面即可看到计算并显示圆形和梯形的面积。
原文地址: http://www.cveoy.top/t/topic/hEnJ 著作权归作者所有。请勿转载和采集!