Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME = "iduona_cashTicket_";

/**
   * 用户登录
   * 
   * @author hongten
   */
  public void login() {
    //用户登录的时候，去读取cookies，并且进行持久话操作，更多的登录操作这里省略啦....
    peristShoppingCartWhenUserLogin(newUser);
    }

/**
   * 加入购物车
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   * ============================================

   * 用户登录前：

   * 用户在选择现金券的时候，点击现金券的加入购物车的时候，会把该现金券的信息(现金券的id，购买数量)

   * 传递到这里，这时候，后台要做的就是从cookie中查询出是否有相同的记录，如果有相同的记录

   * 则把相应的记录更新；否则，就添加新的记录

   * 用户登录后：

   * 用户在登录后，如果有添加购物车操作，则不用保存到cookie中，而是直接持久化购物车信息

   * 
   * @throws Exception
   */
  public void addToShoppingCart() throws Exception {
    if (cashTicket == null || cashTicket.getId() == null || cashTicket.getId() < 1) {
      write("nullId");
    } else if (q == null || q == "") {
      // 购买数量，默认情况下面为1
      q = String.valueOf(1);
    } else {
      // 读取所有的cookie
      Cookie cookies[] = ServletActionContext.getRequest().getCookies();
      if (cookies == null || cookies.length < 0) {
        // 没有cookie
        System.out.println("there is no any cookie ..");
      } else {
        // 判断用户是否登录
        if (getUserInSession() == null) {
          boolean flag = true;
          for (Cookie c : cookies) {
            if (c.getName().equals(Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME + cashTicket.getId())) {
              // 说明已有的cookies中有相应的cookie，就进行更新操作
              Integer oldValue = Integer.valueOf(c.getValue());
              Integer newValue = Integer.valueOf(oldValue + Integer.valueOf(q));
              fixCookie(c, newValue.toString().trim());
              flag = false;
            }
          }
          // 说明已有的cookies中没有相应的cookie，就进行添加操作
          if (flag) {
            addCookie(Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME + cashTicket.getId(), q.trim());
          }

          // ==================================================
          // 测试用，读取所有的cookies
          readShoppingCartFromCookie();
          // ==================================================

          write("success");
        } else {
          // 如果用户登录，说明session存在user,这时就持久化购物车信息
          CashTicket cashTicketTemp = cashTicketService.get(cashTicket.getId());
          if (shoppingCartService.isExistUserAndCashTicket(getUserInSession(), cashTicketTemp)) {
            ShoppingCart oldShoppingCart = shoppingCartService.getByUserAndCashTicket(getUserInSession(), cashTicketTemp);
            oldShoppingCart.setAmount(oldShoppingCart.getAmount() + Integer.valueOf(q));
            if (shoppingCartService.update(oldShoppingCart)) {
              write("success");
            }
          } else {
            ShoppingCart shoppingCartTemp = new ShoppingCart();
            shoppingCartTemp.setAmount(Integer.valueOf(q));
            shoppingCartTemp.setUser(getUserInSession());
            shoppingCartTemp.setCashTicket(cashTicketTemp);
            shoppingCartTemp.setCreateTime(new Date());
            shoppingCartTemp.setStatusType(StatusType.POSITIVE);
            shoppingCartTemp.setUuid(UUID.randomUUID().toString());
            if (shoppingCartService.save(shoppingCartTemp)) {
              write("success");
            }
          }
        }
      }
    }
  }

/**
   * 从cookie中读取购物车信息
   * 
   * @throws Exception
   * @return
   */
  public void readShoppingCartFromCookie() throws Exception {
    System.out.println("======================================================");
    Cookie cookies[] = ServletActionContext.getRequest().getCookies();
    if (cookies == null || cookies.length < 0) {
      // System.out.println("there is no any cookie ..");
      // 没有cookie
    } else {
      for (Cookie c : cookies) {
        System.out.println("haha there are many cookies :" + c.getName() + "  " + c.getValue());
      }
    }
  }

  /**
   * 添加cookie操作
   * 
   * @param name
   *      cookie的name
   * @param value
   *      cookie的value
   */
  public void addCookie(String name, String value) {
    Cookie cookie = new Cookie(name.trim(), value.trim());
    cookie.setMaxAge(2 * 60 * 60 * 1000);// 设置为2个钟
    ServletActionContext.getResponse().addCookie(cookie);
  }

  /**
   * 更新cookie操作
   * 
   * @param c
   *      要修改的cookie
   * @param value
   *      修改的cookie的值
   */
  public void fixCookie(Cookie c, String value) {
    c.setValue(value.trim());
    c.setMaxAge(2 * 60 * 60 * 1000);// 设置为2个钟
    ServletActionContext.getResponse().addCookie(c);
  }

  /**
   * 当用户登录的时候，持久化cookie中的购物车信息，更新为本用户的购物车信息
   */
  public void peristShoppingCartWhenUserLogin(User user) {
    if (null != user) {
      Cookie cookies[] = ServletActionContext.getRequest().getCookies();
      if (cookies != null) {
        for (Cookie c : cookies) {
          if (c.getName().startsWith(Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME)) {
            // 获取cookie的名称："iduona_cashTicket_45" 和 cookie的值： "21"
            String name = c.getName();
            Integer amount = Integer.valueOf(Integer.valueOf(c.getValue())+Integer.valueOf(q));
            Integer ct_id = Integer.valueOf(name.substring(name.lastIndexOf("_") + 1));
            CashTicket temp = cashTicketService.get(ct_id);
            ShoppingCart shoppingCartTemp = new ShoppingCart();
            if (null != temp) {
              if (shoppingCartService.isExistUserAndCashTicket(user, temp)) {
                // 进行更新操作
                ShoppingCart oldShoppingCart = shoppingCartService.getByUserAndCashTicket(user, temp);
                oldShoppingCart.setAmount(amount);
                shoppingCartService.update(oldShoppingCart);
              } else {
                // 否则进行保存记录
                shoppingCartTemp.setAmount(amount);
                shoppingCartTemp.setUser(user);
                shoppingCartTemp.setCashTicket(temp);
                shoppingCartTemp.setCreateTime(new Date());
                shoppingCartTemp.setStatusType(StatusType.POSITIVE);
                shoppingCartTemp.setUuid(UUID.randomUUID().toString());
                shoppingCartService.save(shoppingCartTemp);
              }
            }
          }
        }
        // 移除所有的现金券cookies
        removeAllCookies();
      }
    }
  }

  /**
   * 移除所有的现金券cookies操作
   */
  public void removeAllCookies() {
    Cookie cookies[] = ServletActionContext.getRequest().getCookies();
    if (cookies == null || cookies.length < 0) {
      // 没有cookie
      System.out.println("there is no any cookie ..");
    } else {
      System.out.println("开始删除cookies..");
      for (Cookie c : cookies) {
        if (c.getName().startsWith(Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME)) {
          c.setMaxAge(0);// 设置为0
          ServletActionContext.getResponse().addCookie(c);
        }
      }
    }
  }