JSP的session对象

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 >

< base href = " <%= basePath %> " >

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

< 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" >

<!--

-->

</ 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 >

< base href = " <%= basePath %> " >

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

< 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" >

<!--

-->

</ 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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