一. js 实现记住密码功能
html：
<form action="checklogin.action" method="post" > <div> <label>用户名：</label> <input type="text" /> <span></span> </div> <div> <label>密 码：</label> <input type="password" /> <span></span> </div> <div > <label> </label> <input type="checkbox" /> <span> 记住用户</span> </div> <input type="button" value=""/> </form>
cookie.js:
function setCookie (name, value) { var Days = 30; //此 cookie 将被保存 30 天 var exp = new Date(); exp.setTime(exp.getTime() + 1000); if(value==""||value=="null" ||value=="null"||value==" "){ }else{ document.cookie = name + "="+ escape(value) +";expires=Sun, 17-Jan-2038 19:14:07 GMT"; } } function getCookie(sName){ var aCookie = document.cookie.split("; "); for (var i=0; i < aCookie.length; i++) { var aCrumb = aCookie[i].split("="); if (sName == aCrumb[0]) { return aCrumb[1]; } } return null; } function checkCookieExist(name){ if (getCookie(name)) return true; else return false; } function deleteCookie(name, path, domain){ var strCookie; // 检查Cookie是否存在 if (checkCookieExist(name)){ // 设置Cookie的期限为己过期 strCookie = name + "="; strCookie += (path) ? "; path=" + path : ""; strCookie += (domain) ? "; domain=" + domain : ""; strCookie += "; expires=Thu, 01-Jan-70 00:00:01 GMT"; document.cookie = strCookie; } } function saveCookie(name, value, expires, path, domain, secure){ var strCookie = name + "=" + value; if (expires){ // 计算Cookie的期限, 参数为天数 var curTime = new Date(); curTime.setTime(curTime.getTime() + expires*24*60*60*1000); strCookie += "; expires=" + curTime.toGMTString(); } // Cookie的路径 strCookie += (path) ? "; path=" + path : ""; // Cookie的Domain strCookie += (domain) ? "; domain=" + domain : ""; // 是否需要保密传送,为一个布尔值 strCookie += (secure) ? "; secure" : ""; document.cookie = strCookie; }
login.js
window.onload = function(){ //console.log("ctx: " + "${ctx}"); var name = getCookie("loginUserName"); document.getElementById("passWord").value=""; if(name != null && name != "") { document.getElementById("userName").value = name; document.getElementById("passWord").focus(); } else { document.getElementById("userName").focus(); } } function checkform(){ ...... var isChecked = document.getElementById("saveUserName").checked; if(isChecked) { setCookie("loginUserName",userName); } ...... }
二. jquery 实现记住密码功能
参考：
html：
<form>
<input type="text" autofocus required placeholder="用户名">
<input type="password" required placeholder="密码">
<br/>
<input type="checkbox" onkeydown="check_enter(event)">
<span for="remember_me" onkeydown="check_enter(event)">记住我</span>
<br/><br/>
<span>登 录</span>
</form>
<script src="https://www.jb51.net/jquery.js" type="text/javascript"></script>
<script src="https://www.jb51.net/jquery.cookie.js" type="text/javascript"></script>
判断checkbox是否被选中，若选中，则将存储cookie：
if ($("#remember_me").attr("checked")) { $.cookie("rmbUser", "true", { expires: 7 }); //存储一个带7天期限的cookie $.cookie("username", account, { expires: 7 }); $.cookie("password", password, { expires: 7 }); } else { $.cookie("rmbUser", "false", { expire: -1 }); $.cookie("username", "", { expires: -1 }); $.cookie("password", "", { expires: -1 }); }
在每次刷新登录页面加载js时，取出cookie中的用户名和密码，若cookie不为空，用户名和密码输入框被cookie里面的内容填充，复选框设为勾上状态：
$().ready(function(){ //获取cookie的值 var username = $.cookie('username'); var password = $.cookie('password'); //将获取的值填充入输入框中 $('#username').val(username); $('#password').val(password); if(username != null && username != '' && password != null && password != ''){ //选中保存秘密的复选框 $("#remember_me").attr('checked',true); }