上周给运营系统补了个记住密码的功能，好像很容易的需求啊，还真费了不少劲，补充了不少cookie方面的知识~特地总结下！

大体思路就是通过存/取/删cookie实现的；每次进入登录页，先去读取cookie，如果浏览器的cookie中有账号信息，就自动填充到登录框中，存cookie是在登录成功之后，判断当前用户是否勾选了记住密码，如果勾选了，则把账号信息存到cookie当中，效果图如下：

浏览器中的cookie信息如下图，注意这里的cookie的expire/Max-Age过期时间，这个时间是格林尼治标准时间GMT，世界统一的时间，GMT+8小时就是北京时间，初中地理没学好，特地去查了下！！

实现代码：

html

 

<template><div class="login-wrapper"><form class="form-signin" role="form"><h2 class="form-signin-heading">点播系统</h2><input class="form-control" v-model="userName" v-on:keydown="doLogin($event)" placeholder="用户名" required autofocus><input type="password" class="form-control" v-model="passWord" v-on:keydown="doLogin($event)" placeholder="Password"><div class="checkbox remember-password-container"><input type="checkbox" value="remember-me" v-model="rememberPassword" id="remember-password-checkbox" v-on:click="doRememberPassword($event)"><label for="remember-password-checkbox">Remember me</label></div><div class="btn btn-lg btn-primary btn-block" v-on:click="doLogin()">Sign in</div></form></div>
</template>

 

登录处理逻辑js

 

export default {// name: 'component2',data () {return {userName: "",passWord: "",rememberPassword: false}},// 相当于init doAjaxbeforeCreate() {// console.log('login页面 加载完成！')},// 相当于ready 模板编译挂载之后mounted: function() {//读取cookie中的账号信息，如果有accountInfo的话，则说明该用户之前勾选了记住密码的功能，则需要自动填上账号密码this.loadAccountInfo();},methods: {doLogin: function(event){var mySelf = this;const router = this.$router;// console.log(router)// router.go();// router.push({path:'/index'})// console.log(pars.domain)var mySelf = this;var userName = mySelf.userName;var userPwd = mySelf.passWord;//记住密码checkbox的勾选状态 和账号信息的字符串var rememberStatus = mySelf.rememberPassword;var accountInfo = "";accountInfo = userName + "&" + userPwd;if (event && event.type == 'keydown' && event.keyCode != 13) {return;}//console.log("用户名：" + userName)//console.log("密码：" + userPwd)if (userName == ""){util.showDialog('error','用户名不能为空！');return;}if (userPwd == ""){util.showDialog('error','密码不能为空！');return;}$.get( pars.domain + "xxx" + "&t=" + (new Date).getTime(), function(ret) {if (ret.code == 0) {//如果登录成功，则把账号信息保存在cookie当中if (rememberStatus){console.log("勾选了记住密码，现在开始写入cookie");util.setCookie('accountInfo',accountInfo,1440*3);}else{console.log("没有勾选记住密码，现在开始删除账号cookie");util.delCookie('accountInfo');}// 若为本地环境 则手写cookieif (window.location.href.indexOf('localhost') != -1){util.setCookie('token','zhaopeng_58e0cbbea951f0e79fafcee80da522b8',1440);}// console.log(window.location.href)console.log('登录的返回值为0');router.push({path:'/'});} else {util.showDialog('error','账号名或密码错误!');}}, "json");},doRememberPassword: function(event){let mySelf = this;let rememberStatus = mySelf.rememberPassword;// event.preventDefault();mySelf.rememberPassword = !rememberStatus;//如果去掉勾选，则删掉cookie// if (!rememberStatus){// }// mySelf.rememberPassword = false;},loadAccountInfo: function(){let mySelf = this;//zhaopeng&A15hOsu8YeGnCsjblet accountInfo = util.getCookie('accountInfo');//如果cookie里没有账号信息if(Boolean(accountInfo) == false){console.log('cookie中没有检测到账号信息！');return false;}else{//如果cookie里有账号信息console.log('cookie中检测到账号信息！现在开始预填写！');let userName = "";let passWord = "";let index = accountInfo.indexOf("&");userName = accountInfo.substring(0,index);passWord = accountInfo.substring(index+1);mySelf.userName = userName;mySelf.passWord = passWord;mySelf.rememberPassword = true;}}}
}

操作cookie逻辑js

// 设置cookie
setCookie: function(c_name,value,expiremMinutes){var exdate = new Date();exdate.setTime(exdate.getTime() + expiremMinutes * 60 * 1000);document.cookie= c_name + "=" + escape(value)+((expiremMinutes==null) ? "" : ";expires="+exdate.toGMTString());
},// 读取cookie
getCookie: function(c_name){if (document.cookie.length>0){var c_start=document.cookie.indexOf(c_name + "=");if (c_start!=-1){ c_start=c_start + c_name.length+1;var c_end=document.cookie.indexOf(";",c_start);if (c_end==-1) c_end = document.cookie.lengthreturn unescape(document.cookie.substring(c_start, c_end))}}return ""   
},// 删除cookie
delCookie: function(c_name){var exp = new Date();exp.setTime(exp.getTime() - 1);var cval = this.getCookie(c_name);if(cval!=null){document.cookie = c_name + "=" + cval + ";expires=" + exp.toGMTString();}
},