// 1 进入团购的页面
  @Action(
      value = "nextGrouponitemPage",
      interceptorRefs = {@InterceptorRef(value = "userActionStack")},
      results = {
        @Result(name = SUCCESS, location = "/userPages/grouponitem.jsp"),
        @Result(name = "over", location = "/userPages/cart.jsp")
      })
  public String nextGrouponitemPage() {
    User findUser = (User) ServletActionContext.getRequest().getSession().getAttribute("user");
    // if()
    Groupon find = grouponService.getGroupon(groupon.getId());
    Grouponitem grouponitem = new Grouponitem();
    grouponitem.setId(page);
    grouponitem.setGroupon(find);
    Grouponitem findItem = grouponService.next(grouponitem);
    // 如果没有找到,那么意味着查询已经结束
    if (findItem == null) {
      double fee = 0.0;
      int num = 0;
      List<Cart> result = new ArrayList<Cart>();
      List<Cartitem> items = cartService.getGrouponitemsByUser(findUser.getId(), find.getId());
      for (int i = 0; i < items.size(); i++) {
        Cartitem cartitem = items.get(i);
        num += cartitem.getNum();
        if (cartitem.getSalesBook() == null) {
          if (cartitem.getBook().getDiscount() == 0.0) {
            cartitem.getBook().setDiscount(ConstantUtil.NEWBOOKDISCOUNT);
          }
          SalesBook newbookSalesBook =
              salesBookService.getSalesBookByIsbnSeller(
                  cartitem.getBook().getIsbn(), ConstantUtil.NEWBOOKPRODUCT);
          float discount = ConstantUtil.NEWBOOKDISCOUNT;
          if (newbookSalesBook != null && newbookSalesBook.getDiscount() != null) {
            discount = newbookSalesBook.getDiscount();
          }
          fee +=
              cartitem.getNum() * Math.round(cartitem.getBook().getPrice() * discount * 10) / 10d;
        } else {
          fee += cartitem.getNum() * cartitem.getSalesBook().getPrice();
        }
        Cart cart = cartitem.getCart();
        Cart findCart = getCartByList(cart.getId(), result);
        if (findCart == null) {
          Cart cartResult = new Cart();
          cartResult.setId(cart.getId());
          cartResult.setSeller(cart.getSeller());
          cartResult.setCartitems(new HashSet());
          cartResult.setTotalFee(cart.getTotalFee());
          cartResult.setUser(cart.getUser());
          cartResult.getCartitems().add(cartitem);
          cartitem.setCart(cartResult);
          result.add(cartResult);
        } else {
          findCart.getCartitems().add(cartitem);
          cartitem.setCart(findCart);
        }
      }
      System.out.println(result.size());
      ActionContext.getContext().getValueStack().set("carts", result);
      ActionContext.getContext().getValueStack().set("num", num);
      ActionContext.getContext().getValueStack().set("fee", Math.round(fee * 10) / 10d);
      return "over";
    }

    Book book = bookService.getBookByIsbn(findItem.getBook().getIsbn());
    // 如果没有拿到数据,则返回空
    ServiceArea serviceArea = findUser.getSchool().getServiceArea();
    // 如果找到了,查看新书供应商有没有此数据,如果没有,那么就给新书供应商加进去
    SalesBook newbookSalesBook =
        salesBookService.getSalesBookByIsbnSeller(
            findItem.getBook().getIsbn(), ConstantUtil.NEWBOOKPRODUCT);
    Seller seller = sellerService.getSellerById(ConstantUtil.NEWBOOKPRODUCT);
    SalesBook model =
        salesBookService.getSalesBookByIsbnSeller(findItem.getBook().getIsbn(), seller.getId());
    float bookDiscount;
    if (newbookSalesBook == null) {
      newbookSalesBook = new SalesBook();
      newbookSalesBook.setSeller(seller);
      newbookSalesBook.setBook(book);
      newbookSalesBook.setTitle(book.getTitle());
      newbookSalesBook.setAuthor(book.getAuthor());
      newbookSalesBook.setStandardPrice(book.getPrice());
      newbookSalesBook.setPublisher(book.getPublisher());
      newbookSalesBook.setImage(book.getImage());
      newbookSalesBook.setBigImage(book.getBigImage());
      salesBookService.save(newbookSalesBook);
    }
    if (model == null) {
      model = newbookSalesBook;
    }
    if (newbookSalesBook.getDiscount() == null) {
      bookDiscount = ConstantUtil.NEWBOOKDISCOUNT;
    } else {
      bookDiscount = newbookSalesBook.getDiscount();
    }
    ActionContext.getContext().getValueStack().set("bookDiscount", bookDiscount);
    newbookSalesBook.setDiscount(bookDiscount);
    newbookSalesBook.setPrice(
        Math.round(newbookSalesBook.getBook().getPrice() * bookDiscount * 10) / 10d);
    newbookSalesBook.setNum(999);
    SalesBook salesBook = newbookSalesBook;
    School findSchool = findUser.getSchool();
    List<SellerBean> sellerBeans =
        salesBookService.getSellerBeans(
            newbookSalesBook.getBook().getIsbn(), findSchool.getServiceArea().getId());
    int totalNum = cartService.getGrouponitemsByUser(findUser.getId(), find.getId()).size();
    ActionContext.getContext().getValueStack().set("sellerBeans", sellerBeans);
    ActionContext.getContext().getValueStack().set("item", findItem);
    Seller newBookSeller = sellerService.getSellerById(ConstantUtil.NEWBOOKPRODUCT);
    ActionContext.getContext().getValueStack().set("totalNum", totalNum);
    ActionContext.getContext().getValueStack().set("model", model);
    ActionContext.getContext().getValueStack().set("newBookSeller", newBookSeller);
    ActionContext.getContext()
        .getValueStack()
        .set("price", Math.round(newbookSalesBook.getBook().getPrice() * bookDiscount * 10) / 10d);
    // 获得这个学校所有的团购项目
    return SUCCESS;
  }