<%@page import="java.net.URLEncoder"%>
<%@page import="com.hanqi.web.CardDAO"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body> <%
//设置不缓存页面
response.setHeader("Cache_Control", "no-cache"); //定时跳转
//response.setHeader("refresh", "2;URL=http://www.baidu.com");
//接受数据
String cairnumber =request.getParameter("cairnumber");
String password =request.getParameter("password"); if(cairnumber==null || password == null||cairnumber.equals("")||password.equals(""))
{
out.write("请正确登录系统"); }
else
{
//检查登入信息
CardDAO cd=new CardDAO();
if(cd.checkLogin(cairnumber, password))
{
//out.write("登入成功");
//无缓存的直接发送
response.getWriter().write("验证成功"); //创建cookie
Cookie ck= new Cookie("cairnumber",cairnumber);
ck.setMaxAge(10*24*60*60);//设置过期时间
//发送
response.addCookie(ck); //对中文进行转码
Cookie ck1 =new Cookie("username",URLEncoder.encode("张三"));
response.addCookie(ck1); //创建session
session.setAttribute("cairnumber", cairnumber);
session.setAttribute("username", "李四"); //设置session超时的时间
//默认设置是20分钟
//如果连续超过20分钟没有任何请求发送给服务器，session就失效
//session.setMaxInactiveInterval(30); //页面跳转
response.sendRedirect("Main.jsp");
//response.sendRedirect("http://www.baidu.com");
}
else
{
out.write("登入失败");
//跳回登入页面
response.setHeader("refresh", "2;URL=Login.jsp");
}
} %> </body>
</html>
<%@page import="java.net.URLDecoder"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
系统主页面
<br>
cookie列表
<br>
<%
//检查cookie
//获得cookie集合
Cookie[] cks= request.getCookies();
for(Cookie ck: cks)
{
//解码
out.write(ck.getName()+"="+URLDecoder.decode(ck.getValue()) +"<br>");
} %>
<br>
<br>
<%
//判断session
String cairnumber = session.getAttribute("cairnumber").toString();
out.print("cairnumber="+cairnumber); %>
<br>
<a href="TestLogin.jsp">测试是否已登录的页面</a>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body> <%
Object obj =session.getAttribute("cairnumber");//判断session是否存在
if(obj==null)
{
out.print("您没有登入") ;
response.setHeader("refresh", "2;URL=Login.jsp");
}
else
{
out.print("cairnumber="+obj.toString());
//销毁所有session
//session.invalidate();
//移除某个属性
session.removeAttribute("cairnumber");
} %> </body>
</html>
