js+cookie添加对象

// 假设有一个对象
var user = {
    name: "John Doe",
    email: "john@example.com"
};

// 将对象转换为JSON字符串
var userString = JSON.stringify(user);

// 对字符串进行编码
var encodedUser = encodeURIComponent(userString);

// 设置Cookie，这里设置Cookie的有效期为1天
document.cookie = "user=" + encodedUser + "; expires=" + getCookieExpirationDate(1) + "; path=/";

// 获取Cookie过期日期的函数
function getCookieExpirationDate(days) {
    var date = new Date();
    date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
    return date.toUTCString();
}

// 读取Cookie的函数
function getCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
        if (c.indexOf(nameEQ) == 0) return decodeURIComponent(c.substring(nameEQ.length, c.length));
    }
    return null;
}

// 获取并解析Cookie中的对象
var encodedUser = getCookie("user");
if(encodedUser) {
    var user = JSON.parse(encodedUser);
    console.log(user.name); // 输出: John Doe
    console.log(user.email); // 输出: john@example.com
}