Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME = "iduona_cashTicket_";

/**
   * 用戶登錄
   * 
   * @author hongten
   */
  public void login() {
    //用戶登錄的時候，去讀取cookies，并且進行持久話操作，更多的登錄操作這里省略啦....
    peristShoppingCartWhenUserLogin(newUser);
    }

/**
   * 加入購物車<br> 我的Java學習交流QQ群：589809992 我們一起學Java！
   * ============================================<br>
   * 用戶登錄前：<br>
   * 用戶在選擇現金券的時候，點擊現金券的加入購物車的時候，會把該現金券的信息(現金券的id，購買數量)<br>
   * 傳遞到這里，這時候，后臺要做的就是從cookie中查詢出是否有相同的記錄，如果有相同的記錄<br>
   * 則把相應的記錄更新；否則，就添加新的記錄<br>
   * 用戶登錄后：<br>
   * 用戶在登錄后，如果有添加購物車操作，則不用保存到cookie中，而是直接持久化購物車信息<br>
   * 
   * @throws Exception
   */
  public void addToShoppingCart() throws Exception {
    if (cashTicket == null || cashTicket.getId() == null || cashTicket.getId() < 1) {
      write("nullId");
    } else if (q == null || q == "") {
      // 購買數量，默認情況下面為1
      q = String.valueOf(1);
    } else {
      // 讀取所有的cookie
      Cookie cookies[] = ServletActionContext.getRequest().getCookies();
      if (cookies == null || cookies.length < 0) {
        // 沒有cookie
        System.out.println("there is no any cookie ..");
      } else {
        // 判斷用戶是否登錄
        if (getUserInSession() == null) {
          boolean flag = true;
          for (Cookie c : cookies) {
            if (c.getName().equals(Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME + cashTicket.getId())) {
              // 說明已有的cookies中有相應的cookie，就進行更新操作
              Integer oldValue = Integer.valueOf(c.getValue());
              Integer newValue = Integer.valueOf(oldValue + Integer.valueOf(q));
              fixCookie(c, newValue.toString().trim());
              flag = false;
            }
          }
          // 說明已有的cookies中沒有相應的cookie，就進行添加操作
          if (flag) {
            addCookie(Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME + cashTicket.getId(), q.trim());
          }

          // ==================================================
          // 測試用，讀取所有的cookies
          readShoppingCartFromCookie();
          // ==================================================

          write("success");
        } else {
          // 如果用戶登錄，說明session存在user,這時就持久化購物車信息
          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");
            }
          }
        }
      }
    }
  }

/**
   * 從cookie中讀取購物車信息
   * 
   * @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 ..");
      // 沒有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);// 設置為2個鐘
    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);// 設置為2個鐘
    ServletActionContext.getResponse().addCookie(c);
  }

  /**
   * 當用戶登錄的時候，持久化cookie中的購物車信息，更新為本用戶的購物車信息
   */
  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)) {
            // 獲取cookie的名稱："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)) {
                // 進行更新操作
                ShoppingCart oldShoppingCart = shoppingCartService.getByUserAndCashTicket(user, temp);
                oldShoppingCart.setAmount(amount);
                shoppingCartService.update(oldShoppingCart);
              } else {
                // 否則進行保存記錄
                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);
              }
            }
          }
        }
        // 移除所有的現金券cookies
        removeAllCookies();
      }
    }
  }

  /**
   * 移除所有的現金券cookies操作
   */
  public void removeAllCookies() {
    Cookie cookies[] = ServletActionContext.getRequest().getCookies();
    if (cookies == null || cookies.length < 0) {
      // 沒有cookie
      System.out.println("there is no any cookie ..");
    } else {
      System.out.println("開始刪除cookies..");
      for (Cookie c : cookies) {
        if (c.getName().startsWith(Conf.IDUONA_CASHTICKET_COOKIE_STARTNAME)) {
          c.setMaxAge(0);// 設置為0
          ServletActionContext.getResponse().addCookie(c);
        }
      }
    }
  }