本文实例讲述了JS实现Cookie读、写、删除操作工具类。分享给大家供大家参考，具体如下：/
本文实例讲述了JS实现Cookie读、写、删除操作工具类。分享给大家供大家参考，具体如下：
/***
*读取指定的Cookie值 readCookie("id");
*@param {string} cookieName Cookie名称
*/
function readCookie(cookieName) {
var theCookie = "" + document.cookie;
var ind = theCookie.indexOf(cookieName);
if(ind==-1 || cookieName=="") return "";
var ind1 = theCookie.indexOf(';',ind);
if(ind1==-1) ind1 = theCookie.length;
/*读取Cookie值*/
return unescape(theCookie.substring(ind+cookieName.length+1,ind1));
}
/***
* 设置Cookie值 setCookie("id",1);
* @param {string} cookieName Cookie名称
* @param {string} cookieValue Cookie值
* @param {number} nDays Cookie过期天数
*/
function setCookie(cookieName, cookieValue) {
/*当前日期*/
var today = new Date();
/*Cookie过期时间*/
var expire = new Date();
/*如果未设置nDays参数或者nDays为0，取默认值1*/
//if(nDays == null || nDays == 0) nDays = 1;
/*计算Cookie过期时间【 3600000 * 24 为一天】*/
expire.setTime(today.getTime() + 400000); //5分钟
document.cookie = cookieName + "=" + escape(cookieValue) + ";expires=" + expire.toGMTString();
}
/***
* 删除cookie中指定变量函数
* @param {string} $name Cookie名称
*/
function deleteCookie($name){
var myDate=new Date();
myDate.setTime(-1000);//设置时间
document.cookie=$name+"=''; expires="+myDate.toGMTString();
}
/***
* 删除cookie中所有定变量函数
* @param {string} cookieName Cookie名称
* @param {string} cookieValue Cookie值
* @param {number} nDays Cookie过期天数
*/
function clearCookie(){
var myDate=new Date();
myDate.setTime(-1000);//设置时间
var data=document.cookie;
var dataArray=data.split("; ");
for(var i=0;i<dataArray.length;i++){
var varName=dataArray[i].split("=");
document.cookie=varName[0]+"=''; expires="+myDate.toGMTString();
}
}
附：JS操作cookie的小插件
var CookieUtil = {
// 设置cookie
set : function (name, value, expires, domain, path, secure) {
var cookieText = "";
cookieText += encodeURIComponent(name) + "=" + encodeURIComponent(value);
if (expires instanceof Date) {
cookieText += "; expires=" + expires.toGMTString();
}
if (path) {
cookieText += "; path=" + path;
}
if (domain) {
cookieText += "; domain=" + domain;
}
if (secure) {
cookieText += "; secure";
}
document.cookie = cookieText;
},
// name=value; expires=expiration_time; path=domain_path; domain=domain_name; secure
// 获取cookie
get : function (name) {
var cookieName = encodeURIComponent(name) + "=",
cookieStart = document.cookie.indexOf(cookieName),
cookieValue = "";
if (cookieStart > -1) {
var cookieEnd = document.cookie.indexOf (";", cookieStart);
if (cookieEnd == -1) {
cookieEnd = document.cookie.length;
}
cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));
}
return cookieValue;
},
// 删除cookie
unset : function (name, domain, path, secure) {
this.set(name, "", Date(0), domain, path, secure);
}
};