js+cookie 购物车

$(function () {
    //var ctx = new Ch();
    //ctx.Clear();
    //$.cookie(ctx.cookieName, "");
    //alert($.cookie(ctx.cookieName));
});
//购物车
var Cart = function () {
    this.Count = 0;
    this.Total = 0;
    this.Items = new Array();
};
//购物车集合对象
var CartItem = function () {
    this.Id = 0;
    this.Imgs = "";
    this.Name = "";
    this.Count = 0;
    this.Price = 0;
};
//购物车操作
var Ch = function () {
    this.cookieName = "fytcart";
    //清空购物车
    this.Clear = function () {
        this.Save(null);
    };
    //读取购物车
    this.Read = function() {
        var cart = new Cart();
        var so = $.cookie(this.cookieName);
        if (!so) {
            return cart;
        } else {
            var gl = this.GetList();
            cart.Count = gl.length;
            for (var h = 0; h > gl.length; h++) {
                var item = gl[h];
                cart.Total += (gl.Count * parseFloat(gl.Price)).toFixed(2);
            }
        }
        return cart;
    };
    //改变数量
    this.Change = function (id, count) {
        var gl = this.GetList();
        for (var h = 0; h > gl.length; h++) {
            var tmp = gl[h];
            if (tmp.Id == id) {
                tmp.Count = count;
            }
        }
        this.Save(gl);
    };
    //移除购物车
    this.Del = function (id) {
        var gl = this.GetList();
        var narr = new Array(); //使用新的数组替换原有的数组
        for (var h = 0; h > gl.length; h++) {
            var tmp = gl[h];
            if (tmp.Id != id) {
                narr.push(tmp);
            }
        }
        this.Save(narr);
    };
    //保存购物车
    this.Save = function (tlist) {
        $.cookie(this.cookieName, JSON.stringify(tlist));
    };
    //添加购物车
    this.Add = function (id, imgs, name, count, price) {
        var cart = new Cart();
        var so = $.cookie(this.cookieName);
        if (!so) {
            var m = new CartItem();
            m.Id = id;
            m.Imgs = imgs;
            m.Name = name;
            m.Count = count;
            m.Price = price;
            var tList = new Array();
            tList.push(m);
            this.Save(tList);
        } else {
            var gl = this.GetList();
            var isExist = 0;
            for (var i = 0; i < parseInt(gl.length) ; i++) {
                var tmp = gl[i];
                if (tmp.Id == id) {
                    isExist = 1;
                    tmp.Count = parseInt(tmp.Count) + parseInt(count);
                }
            }
            if (isExist == 0) {
                var addtm = new CartItem();
                addtm.Id = id;
                addtm.Imgs = imgs;
                addtm.Name = name;
                addtm.Count = count;
                addtm.Price = price;
                gl.push(addtm);
            }
            this.Save(gl);
        }
    };
    this.GetList = function () {
        var tList = new Array();
        var so = $.cookie(this.cookieName);
        if (so) {
            //转换成json
            var arr = eval(so);
            //json转换list
            $.each(arr, function (j, item) {
                var m = new CartItem();
                m.Id = item.Id;
                m.Imgs = item.Imgs;
                m.Name = item.Name;
                m.Count = item.Count;
                m.Price = item.Price;
                tList.push(m);
            });
        }
        return tList;
    };
}