JSP 03课 

<%@ 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) %>

 

posted @ 2020-03-22 00:57  闹瓜壳儿疼  阅读(202)  评论(0)    收藏  举报