login.jsp
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page import="java.net.*" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>???????</title>
</head>
<body>
<% request.setCharacterEncoding("utf-8");
String username="";
String password="";
Cookie[] cookie=request.getCookies();
if(cookie!=null&&cookie.length>0){
for(Cookie c:cookie){
if(c.getName().equals("username")){
username=URLDecoder.decode(c.getValue(),"utf-8");
}
if(c.getName().equals("password")){
password=URLDecoder.decode(c.getValue(),"utf-8");
}
}
}
%>
<form action="dologin.jsp" method="post">
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="username" value="<%=username %>"/></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="password" value="<%=password %>"/></td>
</tr>
<tr>
<td colspan="2"><input type="checkbox" name="ischeckbox" checked="checked" value="记住密码"/>记住密码</td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" name="submit" value="登录"/></td>
</tr>
</table>
</form>
<html>
<head>
<!--dologin.jsp--->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ page import="java.net.*" %>
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>???????</title>
</head>
<body>
<% request.setCharacterEncoding("utf-8");
//判断复选框是否被选中
String[] checkbox=request.getParameterValues("ischeckbox");
if(checkbox!=null&&checkbox.length>0){
String username=URLEncoder.encode(request.getParameter("username"),"utf-8");
String password=URLEncoder.encode(request.getParameter("password"),"utf-8");
//获得Cookie对象并将信息存入cookie对象
Cookie usernameCookie=new Cookie("username",username);
Cookie passwordCookie=new Cookie("password",password);
//保存cookie对象
response.addCookie(usernameCookie);
response.addCookie(passwordCookie);
usernameCookie.setMaxAge(864000);//生存期限10天
passwordCookie.setMaxAge(864000);
}
else{
Cookie[] cookie=request.getCookies();//获得之前保存过的Cookie对象
if(cookie!=null&&cookie.length>0){
for(Cookie c:cookie){
if(c.getName().equals("username")||c.getName().equals("password")){
c.setMaxAge(0);//销毁对象
response.addCookie(c);
}
}
}
}
%>
<a href="testlogin.jsp" >查看用户信息</a>
</body>
</html>
testlogin.jsp
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@page import="java.net.URLDecoder"%>
<html>
<head>
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>???????</title>
</head>
<body>
<h1>用户信息</h1>
<hr>
<%
request.setCharacterEncoding("utf-8");
String username="";
String password="";
Cookie[] cookie=request.getCookies();//获取Cookie对象
if(cookie!=null&&cookie.length>0){
for(Cookie c:cookie){
if(c.getName().equals("username")){
username=URLDecoder.decode(c.getValue(),"utf-8");
}
if(c.getName().equals("password")){
password=URLDecoder.decode(c.getValue(),"utf-8");
}
}
}
%>
用户名：<%=username %><br>
密码：<%=password %><br>
</body>
</html>
1 回答
一毛钱
TA贡献156条经验 获得超57个赞
去掉复选框，页面任然记忆账户和密码
这个问题可能是浏览器的记忆功能造成的，你去掉复选框的时候可以清理一下缓存
至于后面的查看详情不为空，也可能是缓存造成的，你可以在<a href="testlogin.jsp?t=时间戳" >查看用户信息</a>
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