session的一个问题

时间：2021-09-12 18:34:14
<%@ page language="java" import="java.util.*,javax.servlet.http.Cookie.*" pageEncoding="utf-8"%>

<%@taglib prefix="html" uri="http://struts.apache.org/tags-html" %>

<%

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 'login.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">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

    <!-- 这里已经生成了一个sessionId 所以会有一个sessionId-->

    <%=session.getId() %><br/>

  </head>

  <!-- 下面这个cookies中不会有上面刚刚生成的sessionId,所以不会显示出来，只有当jsp跳转后，才会到cookie中取的到 -->

  <%

  Cookie cookies[]=request.getCookies();

  if(cookies!=null){

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

            Cookie cookie=cookies[i];

            out.println(cookie.getName() + "   " +cookie.getValue());

            if(cookie.getName().equals("JSESSIONID")){

                out.println(cookie.getValue());

            }

    }

  }

  %>

  <body>登录</h1>

    <form action="/strutsTest1/Test1" method="get">

        u:<input type="text" name="userName"/>&nbsp; &nbsp; <html:errors name="dd"  property="userName"/> <br/>

        p:<input type="password" name="passWord"/><br/>

        <input type="submit"/>

    </form>

  </body>

</html>

//这个可以处理一个浏览器登录两个用户的问题，session中

//这个方法不是很好

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