大学jsp实验3

1、include指令的使用

（1）编写一个名为includeCopyRight.jsp的页面，页面的浏览效果如下：

要求“2016”这个值可以实现动态更新。请写出页面代码：

 1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 2 <%@ page import="java.util.*" %>
 3 <html>
 4 <head>
 5     <title>includeCopyRight</title>
 6 </head>
 7 <body>
 8 <%
 9     Calendar cal = Calendar.getInstance();
10     String year =String.valueOf(cal.get(Calendar.YEAR));
11 %>
12 <center>
13     <p>..............................................................................................................................................</p>
14     <p>颜志军(http://www.yanzhijun.net) 版权所有 2010-<%=year %></p>
15 </body>
16 </html>

（2）编写名为shiyan3_2_1.jsp和shiyan3_2_2.jsp两个JSP页面，页面内容自定，但要求使用include指令将includeCopyRight.jsp页面中显示的版权信息包含进shiyan3_2_1.jsp和shiyan3_2_2.jsp页面中。请写出相应代码：

shiyan1:

 1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 2 <html>
 3 <body>
 4 <%!
 5     double multi(double x, double y) {
 6         return x * y;
 7     }
 8 %>
 9 <%
10     double x = 3.56;
11     double y = 18;
12     out.print("调用方法计算" + x + "与" + y + "之积：");
13     out.print(multi(x, y) + "<br/>");
14 %>
15 <%@include file="includeCopyRight.jsp" %>
16 </body>
17 </html>

shiyan2:

 1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 2 <html>
 3 <body>
 4 <%!
 5     int count = 0;
 6     synchronized void setCount(){
 7         count++;
 8     }
 9 %>
10 <%
11     setCount();
12     out.println("您是第"+count+"个访问本站的用户");
13 %>
14 <%@ include file="includeCopyRight.jsp" %>
15 </body>
16 </html>

（3）编写名为shiyan3_2_3.jsp的页面，其中显现“请输入两个整数，单击提交按钮求这两个整数的平方差”。再编写一个名为shiyan3_2_4.jsp页面，其中显示表单，输入两个整数后，单击提交按钮后可以显示出两数的平方差，效果如下图所示。要求在shiyan3_2_3.jsp包含shiyan3_2_4.jsp。

shiyan3_2_3.jsp:

 1 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 2 <html>
 3 <head>
 4     <title>平方差</title>
 5 </head>
 6 <body>
 7 <P>输入两个整数，单击提交按钮求这两个整数的平方差</P>
 8 <%@ include file="shiyan3_2_4.jsp" %>
 9 <%
10     String str1 = request.getParameter("one");
11     String str2 = request.getParameter("two");
12     try {
13         int num1 = Integer.parseInt(str1);
14 
15         int num2 = Integer.parseInt(str2);
16         int num = num1*num1-num2*num2;
17         out.println("你输入的两个整数的平方差是："+num);
18     }catch (NumberFormatException e){
19     }
20 %>
21 </body>
22 </html>

shiyan3_2_4.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>计规范化算</title>
</head>
<body>

<form action="" method="post" name="form">
    整数1:<input type="text" name="one"><br><br>
    整数2:<input type="text" name="two"><br><br>
    <input type="submit" value="提交" name="submit">
</form>

</body>
</html>

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