使用定时任务来实现缓存操作（独特方式）

    private Map couponMap = new ConcurrentHashMap();


    public void updateCouponMap(){
        Map couponMap1 = new ConcurrentHashMap();
        List<TCoupon> tCoupons= this.loadCoupon(1);
        couponMap1.put(1,tCoupons);
        couponMap = couponMap1;
    }