JSP第三次作业

main.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>

</head>
<body>
    <%!double r = 1, a = 2, b = 3, c = 4;%>
    <br>计算半径为<%=r%>的圆的面积：
    <jsp:include page="circle.jsp">
        <jsp:param value="<%=r %>" name="name3" />
    </jsp:include>
    <p>---------------------------------------------------------------------</p>
    <br>计算上底、下底、高为<%=a%>,<%=b%><%=c%>的梯形面积
    <jsp:include page="ladder.jsp">
        <jsp:param value="<%=a %>" name="name1" />
        <jsp:param value="<%=b %>" name="name2" />
        <jsp:param value="<%=c %>" name="name3" />
    </jsp:include>
</body>
</html>

circle.jsp

<%@page contentType="text/html;charset=utf-8"%>
<%
    String sideR = request.getParameter("name3");
    double r = Double.parseDouble(sideR);
    
%>
<%!

public String getArea(double r) {
        double area = r * r * 3.14;
        return "" + area;
    }%>

<br>

<br>
圆的半径是：<%=r%>
<br>
圆的面积是：<%=getArea(r)%>

ladder.jsp

<%@page contentType="text/html;charset=utf-8"%>
<%
    String name1 = request.getParameter("name1");
    String name2 = request.getParameter("name2");
    String name3 = request.getParameter("name3");
    double a = Double.parseDouble(name1);
    double b = Double.parseDouble(name2);
    double c = Double.parseDouble(name3);
%>
<%!public String getArea(double a, double b, double c) {
        double area = ((a + b) * c) / 2;
        return "" + area;
    }%>

<br>

<br>
梯形的上底、下底、高是：
<%=name1%>
<%=name2%>
<%=name3%>
<br>
梯形的面积是：
<%=getArea(a, b, c)%>

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原文地址：https://www.cnblogs.com/522-simple/p/12557545.html