main
<body>
<jsp:include page="cricle.jsp">
<jsp:param value="4" name="R"/>
</jsp:include>
<br>
<jsp:include page="ladder.jsp">
<jsp:param value="3" name="shangdi"/>
<jsp:param value="2" name="xiadi"/>
<jsp:param value="6" name="gao"/>
</jsp:include>
</body>
ladder
<body> <% String shangdi = request.getParameter("shangdi"); String xiadi = request.getParameter("shangdi"); String gao = request.getParameter("xiadi"); int shang = Integer.parseInt(shangdi); int xia = Integer.parseInt(xiadi); int g = Integer.parseInt(gao); out.println("上底为：" + shangdi + "，下底为：" + xiadi + "，高为：" + gao); out.print("梯形的面积为：" + ((shang + xia) * g) / 2); %> </body>
cricle
<body> <% String r = request.getParameter("R"); int R = Integer.parseInt(r); out.print("园的半径为："+ r +" "+ "园的面积为：" + 3.14 * R * R); %> </body>
