JSP的session对象

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一 session对象简介

二 session对象的方法

三实例

1、session_page1.jsp

<%@ 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>

2、session_page2.jsp

<%@ 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的ID编号：<%=session.getId()%><BR>

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

Session中保存的属性有:<%

String[] names =session.getValueNames();

for(int i=0;i<names.length;i++)

{

out.println(names[i]+"  ");

}

%> <br>

</body>

</html>

四运行结果

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