javascript创建cookie、读取cookie

本文内容分为两个部分进行学习，分别介绍了javascript创建cookie、javascript读取cookie的具体实现方法，供大家学习，具体内容如下

一、创建Cookie

document.cookie = ‘key=value’;

有特殊字符 使用encodeURIComponent() 进行编码

document.cookie = ‘user=’+encodeURIComponent(‘郭钱;’);

读取时 使用decodeURIComponent()

例如：

document.cookie = 'name=guoqian';
document.cookie = 'age=24';
document.cookie = 'address=hunan';
document.cookie = 'user='+encodeURIComponent('郭钱;'); 

自定义一个创建cookie方法

function SetCookie(name, value, expires, path, domain, secure) {
 var today = new Date();
 today.setTime(today.getTime());
 if(expires) { expires *= 86400000; }
 var expires_date = new Date(today.getTime() + (expires));
 document.cookie = name + "=" + escape(value)
  + (expires ? ";expires=" + expires_date.toGMTString() : "")
  + (path ? ";path=" + path : "")
  + (domain ? ";domain=" + domain : "")
  + (secure ? ";secure" : "");
}

二、获取cookie

使用字符串方式

function getCookieByString(cookieName){
 var start = document.cookie.indexOf(cookieName+'=');
 if (start == -1) return false;
 start = start+cookieName.length+1;
 var end = document.cookie.indexOf(';', start);
 if (end == -1) end=document.cookie.length;
 return document.cookie.substring(start, end);
}

使用数组方式

function getCookieByArray(name){
 var cookies = document.cookie.split(';');
 var c;
 for(var i=0; i<cookies.length ; i++){
  c = cookies[i].split('=');
  if (c[0].replace(' ', '') == name) {
   return c[1];
  }
 }
}
var r = decodeURIComponent(getCookieByArray('user'));
alert(r);

以上就是本文的全部内容，希望对大家的学习有所帮助。