Jquery里面提供了很多插件，方便，安全，快速实用。这节一起熟悉下JQUERY中操作Cookie的插件，插件名称为jquery.cookie.js，可以去官方网站下载。
插件主要报告如下几个用法
1.创建Cookie
创建一个名称为username,值为 admin的cookie ,如下
复制代码 代码如下:
$.cookie('username',"admin");
当然cookie还包括路径，过期时间等其他参数，一起看下其他参数的用法
复制代码 代码如下:
$.cookie('username', 'admin', {expires: 7, path: 'https://www.jb51.net/', domain: 'jquery.com', secure: true});
expires:表示过期时间，默认为天，如上表示过期时间为7天,如果省略过期时间，表示关闭浏览器时候，cookie将被删除
也可以设置cookie的过期时间,如下设置3分钟后过期
var dt= new date(); dt.settime(date.gettime() + (3* 60 * 1000)); $.cookie('username', 'admin', { expires: dt});
path:定义cookie的有效路径，默认情况下路径为创建cookie网页所在的路径，如果想让整个网站访问到，路径设置为path: 'https://www.jb51.net/'
domain：设置cookie所在的域
secure: 如果为true表示cookie的传输需要使用https安全协议，默认为false
2.删除Cookie
可以使用两种方法
$.removeCookie("username"); $.cookie('username',"null");
3.读取cookie
复制代码 代码如下:
var account = $.cookie('username');
如果没有写入cookie，读取到的值为undefined
附：jquery.cookie.js完整代码如下：
/*! * jQuery Cookie Plugin v1.4.1 * https://github.com/carhartl/jquery-cookie * * Copyright 2006, 2014 Klaus Hartl * Released under the MIT license */ (function (factory) { if (typeof define === 'function' && define.amd) { // AMD (Register as an anonymous module) define(['jquery'], factory); } else if (typeof exports === 'object') { // Node/CommonJS module.exports = factory(require('jquery')); } else { // Browser globals factory(jQuery); } }(function ($) { var pluses = /\+/g; function encode(s) { return config.raw ? s : encodeURIComponent(s); } function decode(s) { return config.raw ? s : decodeURIComponent(s); } function stringifyCookieValue(value) { return encode(config.json ? JSON.stringify(value) : String(value)); } function parseCookieValue(s) { if (s.indexOf('"') === 0) { // This is a quoted cookie as according to RFC2068, unescape... s = s.slice(1, -1).replace(/\\"/g, '"').replace(/\\\\/g, '\\'); } try { // Replace server-side written pluses with spaces. // If we can't decode the cookie, ignore it, it's unusable. // If we can't parse the cookie, ignore it, it's unusable. s = decodeURIComponent(s.replace(pluses, ' ')); return config.json ? JSON.parse(s) : s; } catch(e) {} } function read(s, converter) { var value = config.raw ? s : parseCookieValue(s); return $.isFunction(converter) ? converter(value) : value; } var config = $.cookie = function (key, value, options) { // Write if (arguments.length > 1 && !$.isFunction(value)) { options = $.extend({}, config.defaults, options); if (typeof options.expires === 'number') { var days = options.expires, t = options.expires = new Date(); t.setMilliseconds(t.getMilliseconds() + days * 864e+5); } return (document.cookie = [ encode(key), '=', stringifyCookieValue(value), options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE options.path ? '; path=' + options.path : '', options.domain ? '; domain=' + options.domain : '', options.secure ? '; secure' : '' ].join('')); } // Read var result = key ? undefined : {}, // To prevent the for loop in the first place assign an empty array // in case there are no cookies at all. Also prevents odd result when // calling $.cookie(). cookies = document.cookie ? document.cookie.split('; ') : [], i = 0, l = cookies.length; for (; i < l; i++) { var parts = cookies[i].split('='), name = decode(parts.shift()), cookie = parts.join('='); if (key === name) { // If second argument (value) is a function it's a converter... result = read(cookie, value); break; } // Prevent storing a cookie that we couldn't decode. if (!key && (cookie = read(cookie)) !== undefined) { result[name] = cookie; } } return result; }; config.defaults = {}; $.removeCookie = function (key, options) { // Must not alter options, thus extending a fresh object... $.cookie(key, '', $.extend({}, options, { expires: -1 })); return !$.cookie(key); }; }));