<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% 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 ‘main.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=1,a=2,b=3,c=4; %> <br/>加载circle.jsp计算半径为<%=r %>的圆的面积： <jsp:include page="circle.jsp"> <jsp:param value="<%=r %>" name="sideR"/> </jsp:include> <p>-----------------</p> <b/>加载laddrt.jsp的上下底和高<%=a %><%=b %><%=c %>的梯形面积： <jsp:include page="ladder.jsp"> <jsp:param value="<%=a %>" name="sideA"/> <jsp:param value="<%=b %>" name="sideB"/> <jsp:param value="<%=c %>" name="sideC"/> </jsp:include> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%! public String getArea(double r) { if(r>0) { double area=r*r*3.14; return""+area; } else { return("半径小于0有误,无法计算"); } } %> <% String sideR=request.getParameter("sideR"); double r=Double.parseDouble(sideR); %> <br><br>我是被加载的文件，负责计算圆的面积<br> 给我传递的半径是：<%=r%> <br>圆的面积是：<%=getArea(r) %>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%! public String getArea(double a,double b,double c) { if(a>0&&b>0&&c>0) { double area=(a+b)*c/2; return ""+area; } else{ return("梯形的上底、下底、高"+a+" "+b+" "+c+"不能为大于0以外的数字，无法计算面积"); } } %> <% String sideA=request.getParameter("sideA"); String sideB=request.getParameter("sideB"); String sideC=request.getParameter("sideC"); double a=Double.parseDouble(sideA); double b=Double.parseDouble(sideB); double c=Double.parseDouble(sideC); %> <br><br>我是被加载的文件，负责计算圆的面积<br> 给我传递的上底、下底、高是：<%=sideA%> <%=sideB %> <%=sideC %> <br>梯形的面积是：<%=getArea(a,b,c) %>
原文：https://www.cnblogs.com/naoguakerteng/p/12543720.html