[jsp]代码库
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<!-- jsp 中的 4 个 域对象 , 由小 到大的范围是 , page, request, session, application -->
<%
// 向 page 域 中 存入 数据
//pageContext.setAttribute("info", "page", PageContext.PAGE_SCOPE );
// 向 request 域 存入 数据
//pageContext.setAttribute("info", "request",PageContext.REQUEST_SCOPE);
// 向 session 域 中 存入 数据
//pageContext.setAttribute("info", "session",PageContext.SESSION_SCOPE);
// 向 application 域中存入 数据
pageContext.setAttribute("info", "application",PageContext.APPLICATION_SCOPE);
%>
<%= pageContext.getAttribute("info", PageContext.PAGE_SCOPE ) %>
<%= pageContext.getAttribute("info", PageContext.REQUEST_SCOPE ) %>
<%= pageContext.getAttribute("info", PageContext.SESSION_SCOPE ) %>
<%= pageContext.getAttribute("info", PageContext.APPLICATION_SCOPE ) %>
<hr/>
<%= pageContext.findAttribute("info") %>
</body>
</html>