如何用js来操作cookie呢？

Posted 2023-03-16

请问下面这段功能如果用js操作cookie应该怎么写？
<script>
if cookie中无标记 then
document.write("呵呵1")
标记=1
if 标记=1 then
document.write(“呵呵2”)
if 标记=2 then
document.write(“呵呵3”)
</script>

js操作COOKIE，直接给document加上cookie就可以了，但是一般如果单个的加会很麻烦所以一般会直接写好一个函数，可以直接操作cookie，这样就很方便了

setCookie这个是写入cookie，第一个是名称，第二个是cookie值，第三个是过期时间

getCookie这个是查找cookie;

removeCookie这是你需要删除的cookie;

function setCookie(name, value, iDay) 

var oDate=new Date();

oDate.setDate(oDate.getDate()+iDay);

document.cookie=name+'='+encodeURIComponent(value)+';expires='+oDate;


function getCookie(name)

var arr=document.cookie.split('; ');
var i=0;
for(i=0;i<arr.length;i++)

//arr2->['username', 'abc']
var arr2=arr[i].split('=');

if(arr2[0]==name)

var getC = decodeURIComponent(arr2[1]);
return getC;



return '';


function removeCookie(name)

setCookie(name, '1', -1);

参考技术A <SCRIPT language="javascript">
<!--
//首先获取name就是标记
function getcookie(Name)
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0)
offset = document.cookie.indexOf(search)
if (offset != -1)
offset += search.length
end = document.cookie.indexOf(";", offset);
if (end == -1)
end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))


return returnvalue;

function okla()
if (getcookie('biaoji')=='')
document.write("呵呵1");
document.cookie="biaoji=1"
else if (getcookie('biaoji')=='1')
document.write("呵呵2");
document.cookie="biaoji=2"
else if (getcookie('biaoji')=='2')
document.write("呵呵3")


okla()
//-->
</SCRIPT>
直接粘贴到html里运行，显示呵呵1，再刷新显示呵呵2再刷新显示呵呵3，不知道是不是你想要的这个效果。本回答被提问者采纳 参考技术B <SCRIPT LANGUAGE="JavaScript">
<!--

function Cookie()
var self = this;
var trim = function(str)
return str.replace(/(^\s*)|(\s*$)/g, "");


/*-------------------
Private method init()
When create a instance,all exists cookie will add as public property.
-------------------*/
var init = function()
var allcookies = document.cookie;
if (allcookies == "") return;
var cookies = allcookies.split(';');
for(var i=0; i < cookies.length; i++) // Break each pair into an array
cookies[i] = cookies[i].split('=');
for(var i = 0; i < cookies.length; i++)
self[trim(cookies[i][0])] = decodeURIComponent(cookies[i][1]);



init();

/*--------------------
Public method save()
--------------------*/
this.save = function(daysToLive, path, domain, secure)
var dt = (new Date()).getTime() + daysToLive * 24 * 60 * 60 * 1000;
for(var prop in this)
if (typeof this[prop] == 'function')
continue;

var cookie = "";
cookie = prop + '=' + encodeURIComponent(this[prop]);

if (daysToLive || daysToLive == 0) cookie += ";expires=" + new Date(dt).toUTCString();
if (path) cookie += ";path=" + path;
if (domain) cookie += "; domain=" + domain;
if (secure) cookie += ";secure";
document.cookie = cookie;



/*--------------------
Public method remove()
--------------------*/
this.remove = function(path, domain, secure)
self.save(0, path, domain, secure);
/*-----------------------
Must save(0) first then delete this object's property
If delete first,save(0) will not save anlything.
-----------------------*/
for(var prop in this)
if (typeof this[prop] != 'function')
delete this[prop];




var cookie = new Cookie("vistordata");

if (!cookie.poped)
window.alert('呵呵1');
cookie.poped=1;
cookie.save(10);
else

if(cookie.poped=1)
window.alert('呵呵2');
cookie.poped=2
cookie.save(10);
else
window.alert('呵呵3');





//-->
</SCRIPT>

如何用HttpClient来操作Cookie-CSDN论坛

参考技术A 1．服务器认证(Server Authentication)
HttpClient处理服务器认证几乎是透明的，仅需要开发人员提供登录信息(login credentials)。登录信息保存在HttpState类的实例中，可以通过 setCredentials(String realm, Credentials cred)和getCredentials(String realm)来获取或设置。
HttpClient内建的自动认证，可以通过HttpMethod类的setDoAuthentication(boolean doAuthentication)方法关闭，而且这次关闭只影响HttpMethod当前的实例。

2.代理认证(proxy authentication)
　　除了登录信息需单独存放以外，代理认证与服务器认证几乎一致。用 setProxyCredentials(String realm, Credentials cred)和 getProxyCredentials(String realm)设、取登录信息。

3.认证方案(authentication schemes)

是HTTP中规定最早的也是最兼容的方案，遗憾的是也是最不安全的一个方案，因为它以明码传送用户名和密码。它要求一个UsernamePasswordCredentials实例，可以指定服务器端的访问空间或采用默认的登录信息。