JSP的pageContext对象和config对象

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一 pageContext对象

二 pageContext对象常用方法

三 pageContext方法测试

代码1：

<%@ page language="java" import="java.util.*,java.text.*" contentType="text/html; charset=utf-8"%>

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>

<title>My JSP 'index.jsp' starting page</title>

<!--

-->

</head>

<body>

<h1>session内置对象</h1>

<hr>

SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");

Date d = new Date(session.getCreationTime());

session.setAttribute("username", "admin");

session.setAttribute("password", "123456");

session.setAttribute("age", 20);

//设置当前session最大生成期限单位是秒

//session.setMaxInactiveInterval(10);//10秒钟

Session创建时间：<%=sdf.format(d)%><br>

Session的ID编号：<%=session.getId()%><BR>

从Session中获取用户名：<%=session.getAttribute("username") %><br>

<a href="session_page2.jsp" target="_blank">跳转到Session_page2.jsp</a>

</body>

</html>

代码2：

<%@ page language="java" import="java.util.*,java.text.*" contentType="text/html; charset=utf-8"%>

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");

String s = sdf.format(date);

out.println(s+"<br>");

代码3：

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>

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>

<title>My JSP 'index.jsp' starting page</title>

<!--

-->

</head>

<body>

<h1>pageContext内置对象</h1>

<hr>

用户名是：<%=pageContext.getSession().getAttribute("username") %><br>

//跳转到注册页面

//pageContext.forward("reg.jsp");

pageContext.include("include.jsp");

</body>

</html>

验证结果：

四 config对象

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