include和application

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include指令

语法：<%@ include file=”路径+文件名” %>

把指定的文件包含到当前jsp中。

application(应用的全局变量)

实现用户之间的数据共享

常用方法：

Application.setAttribute(Stirng key,Object value);

Application.getAttribute(String key);

 1 <%@page import="java.text.SimpleDateFormat"%>
 2 <%@page import="java.util.Date"%>
 3 <%@ page language="java" contentType="text/html; charset=utf-8"
 4     pageEncoding="utf-8"%>
 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 6 <html>
 7 <head>
 8 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 9 <title>访问人数</title>
10 </head>
11 <body>
12     <%
13         Integer count=(Integer) application.getAttribute("count");
14         if(count != null){
15             count = count+1;
16         }else{
17             count = 1; 
18         }
19         application.setAttribute("count", count);
20     %>
21     
22     <%
23         Integer i=(Integer)application.getAttribute("count") ;
24         out.print("统计访问量：目前有"+i+"个人访问本网站");
25     %>
26     
27 </body>
28 </html>