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>