session常用方法示例

来源：互联网发布：手机淘宝抢购页面刷新编辑：程序博客网时间：2024/05/22 06:40

功能描述：login.jsp 输入name登录，进入main.jsp，在main.jsp可以重新登陆,也可以注销当前用户。

<%@ page language="java" import="java.util.*" pageEncoding="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 'login.jsp' starting page</title>  </head>    <body>    SessionId:<%=session.getId() %><br><br>    IsNew:<%=session.isNew() %><br><br>    MaxInactiveInterval:<%=session.getMaxInactiveInterval() %><br><br>    CreationTime:<%=session.getCreationTime() %><br><br>    LastAccessedTime:<%=session.getLastAccessedTime() %><br><br>    <form action="<%=basePath%>session/main.jsp">    username:<input type="text" name="username"        <% Object obj=session.getAttribute("username");         if(obj==null){         obj="";         }%>                    value=<%=obj.toString()%>>    <input type="submit" value="提交">    </form>  </body></html>

main.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="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 'main.jsp' starting page</title>  </head>    <body>    SessionId:<%=session.getId() %><br><br>    IsNew:<%=session.isNew() %><br><br>    MaxInactiveInterval:<%=session.getMaxInactiveInterval() %><br><br>    CreationTime:<%=session.getCreationTime() %><br><br>    LastAccessedTime:<%=session.getLastAccessedTime() %><br><br>       用户名:<%=request.getParameter("username") %><br>   <a href="<%=basePath%>session/login.jsp?username=<%session.setAttribute("username",request.getParameter("username"));%>">返回登录页</a><br>    <a href="<%=basePath%>session/logout.jsp?username=<%session.setAttribute("username",request.getParameter("username"));%>">注销</a><br>     </body></html>

logout.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="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 'login.jsp' starting page</title>  </head>    <body>    SessionId:<%=session.getId() %><br><br>    IsNew:<%=session.isNew() %><br><br>    MaxInactiveInterval:<%=session.getMaxInactiveInterval() %><br><br>    CreationTime:<%=session.getCreationTime() %><br><br>    LastAccessedTime:<%=session.getLastAccessedTime() %><br><br>    <form action="<%=basePath%>session/main.jsp">    bye:<input type="text" name="username"        <% Object obj=session.getAttribute("username");         if(obj==null){         obj="";         }%>                    value=<%=obj.toString()%>>    <a href="<%=basePath%>session/login.jsp">返回登录页</a><br>    <%session.invalidate(); %>    </form>  </body></html>

测试：

进入login.jsp,并输入内容:

点击提交，进入main.jsp:

点击main.jsp中的"返回登录页"按钮：

点击main.jsp中的"注销"按钮：

点击logout.jsp中的“返回登录页”按钮：

阅读全文

0 0