我们看到许多网站登录时都有记住用户名的复选框,例如
这样更人性化,避免用户体验差.
那么如何实现呢?
核心思路:把用户登录信息存到浏览器的cookie中,下次登录时先从浏览器cookie中读取.
在页面中如何获取cookie值呢?
如果是JSP的话,可以通过servlet的对象request 获取cookie,可以
参考:http://hw1287789687.iteye.com/blog/2050040
如果要求登录页面是html呢?html页面中如何获取cookie呢?
直接上代码了
页面:loginInput.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!-- base href="http://localhost:8080/shop_goods/" -->
<title>user login</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">
<script language="JavaScript" src="/shop_goods/js/common_util.js" type="text/javascript"></script>
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
.errorMessage li {
list-style-type: none;
margin-left: 0
}
</style>
</head>
<body>
<script type="text/javascript">
//获取cookie的值
function getCookie(cookieKey){
var cookies = document.cookie ? document.cookie.split('; ') : [];
for (var i = 0, l = cookies.length; i < l; i++) {
var parts = cookies[i].split('=');
if(parts.length>1){
if(parts[0]==cookieKey){
//username1=;
return parts[1];
}
}
}
return '';
}
var username1='';
window.onload=function(){
//cookie的key是'userEmail'
username1=getCookie('userEmail');
//alert("username1:"+username1);
var issave222=com.whuang.hsj.$$one("issave");
if(username1){
if(username1!='' && username1!=null &&username1!=undefined){
com.whuang.hsj.$$one("user.username").value=username1;
issave222.checked=true;
}else{
issave222.checked=false;
}
}else{
issave222.checked=false;
}
}
</script>
This is login page.
<br>
<a href="/shop_goods/">index</a>
<br>
<a href="/shop_goods/user/registerUser.jsp">register user</a>
<font color="red"></font>
<font style="font-weight: bold" color="red"> </font>
<form action="/shop_goods/user/login" method="post">
<table>
<tbody><tr>
<td>username:</td>
<td><input name="user.username" id="user_username" type="text">
</td>
</tr>
<tr>
<td>password:</td>
<td><input name="user.password" id="user_password" type="text">
</td>
</tr>
<tr> <td colspan="2"> <input name="issave" value="save" type="checkbox"> 保存用户名</td></tr>
<tr>
<td colspan="2"><input id="" value="login" type="submit">
</td>
</tr>
</tbody></table>
</form></body></html>com.whuang.hsj.$$one等方法参见附件
参考地址:
http://hw1287789687.iteye.com/blog/2050040
http://hw1287789687.iteye.com/blog/2053897
