怎么用cookie实现购物车？

Question

以前用过 session 做过一个购物车，现在想用cookie 实现购物车，哪位大侠给小弟讲讲思路，最好有源代码，小弟感激不尽！

Answer 1

http://wangyu.javaeye.com/blog/210827，这里面讲的很详细，看看吧

Answer 2

生成cookie:
Cookie cookie = new Cookie("clothes","2");
cookie.setMaxAge("3600*12");
request.addCookie(cookie);取cookie:
request.getCookies();

Answer 3

Java读写cookie /*
 * 写cookie
*/
Cookie namecookie = new Cookie("name",name);
Cookie passwordcookie = new Cookie("password",password);
Cookie optioncookie = new Cookie("option","1");//生命周期    
namecookie.setMaxAge(60*60*24*365);
passwordcookie.setMaxAge(60*60*24*365);
optioncookie.setMaxAge(60*60*24*365);
    
response.addCookie(namecookie);
response.addCookie(passwordcookie); 
response.addCookie(optioncookie); /*
 * 读cookie
*/
Cookie[] cookies = request.getCookies();
if(cookies!=null)
{
    String name = "";
    String password = "";
    String option = "";
    for (int i = 0; i < cookies.length; i++) 
    {
       Cookie c = cookies[i];     
       if(c.getName().equalsIgnoreCase("name"))
       {
          name = c.getValue();
        }
        else if(c.getName().equalsIgnoreCase("password"))
        {
           password = c.getValue();
        }
        else if(c.getName().equalsIgnoreCase("option"))
        {
           option = c.getValue();
        }     
    } 
  }

Answer 4

 #region 添加到购物车AddShoppingCar
    /// <summary>
    /// 添加到购物车AddShoppingCar
    /// </summary>
    /// <param name="num">数量 如果存在产品 负数是减少 
    /// 正数是增加 如果不存在 直接增加</param>
    /// <param name="id">货物ID</param>
    /// <param name="expires">cookies保存的天数</param>
    /// <param name="Products">cookies的名字</param>
    /// <res>这里的方法就是把在原有的Cookie基础上判断是否有
    /// 这个产品 如果有 在原有数量上增加 没有 就直接增加 如果是负
    /// 数 就是减少 如果负数的数量大于等于
    /// 原有数量 设置为0 对应后面的读出操作</res>
    public static void AddShoppingCar(string num, string id, int expires, string products)
    {
        if (System.Web.HttpContext.Current.Request.Cookies[products] != null)
        {
            System.Web.HttpCookie cookie;
            string cookievalue = System.Web.HttpContext.Current.Request.Cookies[products].Value;
            if (System.Web.HttpContext.Current.Request.Cookies[products].Values[id.ToString()] == null)
            {
                cookievalue = cookievalue + "&" + id + "=" + num;            }
            else
            {
                int num1 = int.Parse(System.Web.HttpContext.Current.Request.Cookies[products].Values[id.ToString()].ToString()) + int.Parse(num);
                if (num1 > 0)
                {
                    System.Web.HttpContext.Current.Request.Cookies[products].Values[id.ToString()] = num1.ToString();
                }
                else
                {
                    System.Web.HttpContext.Current.Request.Cookies[products].Values[id.ToString()] = "0";
                }
                cookievalue = System.Web.HttpContext.Current.Request.Cookies[products].Value;
            }
            cookie = new System.Web.HttpCookie(products, cookievalue);
            
            if (expires != 0)
            {
                DateTime dt = DateTime.Now;
                TimeSpan ts = new TimeSpan(expires, 0, 0, 20);
                cookie.Expires = dt.Add(ts);
            }
            System.Web.HttpContext.Current.Response.AppendCookie(cookie);
        }
        else
        {
            System.Web.HttpCookie newcookie = new HttpCookie(products);
            if (expires != 0)
            {
                DateTime dt = DateTime.Now;
                TimeSpan ts = new TimeSpan(expires, 0, 0, 20);
               
                newcookie.Expires = dt.Add(ts);
            }
            newcookie.Values[id.ToString()] = num;
            System.Web.HttpContext.Current.Response.AppendCookie(newcookie);
        }
    }
    #endregion

Answer 5

http://m.cnblogs.com/40900/1345435.html
很经典