JSP_<jsp:application>執行個體

來源:互聯網
上載者:User

標籤:jsp

本文出自:http://blog.csdn.net/svitter


實驗環境:Myeclipse10 + tomcat7

Application對象為了多個應用程式儲存資訊,對於每個容器,每個使用者都共同擁有一個application對象,伺服器啟動以後,會自動建立一個application對象,這個對象會一直保持到伺服器關閉。

下列執行個體用於統計頁面訪問次數。


1.application.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%int count = 0;String c_name = request.getParameter("c_name");try {count = Integer.parseInt((application.getAttribute("c_name").toString()));} catch(Exception e){ }out.println("自伺服器啟動後,此頁面已經被訪問了" + count +"次");count++;application.setAttribute("c_name", new Integer(count)); %>


2.test_application.jsp

<%@ page language="java" import="java.sql.*" pageEncoding="utf-8" errorPage=""%><%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>使用計數器的例子</title>    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"><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>  測試計數器<br>  <jsp:include page="application.jsp">     <jsp:param name="c_name" value=" " />  </jsp:include>  </body></html>

對應資源:http://download.csdn.net/detail/svitter/7358563

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