简单的session退出页面，jsp：
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><title>退出</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"> --></head><body><%if(session.getAttribute("commName")!=null){ session.removeValue("commName");}if(session.getAttribute("adminName")!=null){ session.removeValue("adminName");}%><!-- response.sendRedirect("/FlowerShop/main/body.jsp"); --></body><script type="text/javascript"> window.open('first.jsp','_top');</script></html>