支付功能

// 支付功能
    @RequestMapping(value = "/pay", method = RequestMethod.POST)
    public String pay(HttpServletRequest req) {
        // 此处应该实现购物的整个过程

        String result = "";
        // 获取用户对象
        Tuser tu = (Tuser) req.getSession().getAttribute("tu");
        // 获取到选择的鲜花的ID集合
        String strs = (String) req.getSession().getAttribute("strs");
        // 获取到需要支付的总价
        Double sum = (Double) req.getSession().getAttribute("sum");
        // 获取到花的数量
        Map<String, Integer> flowercount = (Map<String, Integer>) req.getSession().getAttribute("flowercount");
        // 获取到花的总价
        Map<String, Double> flowersum = (Map<String, Double>) req.getSession().getAttribute("flowersum");
        try {
            userService.buy(tu, strs, sum, flowercount, flowersum);
            // req.getRequestDispatcher("MainServ").forward(req, resp);
            result = "forward:goMainpost.do";
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return result;
    }