Redis——实现乐观锁

核心代码：

 try {
                Thread.sleep((int)Math.random()*5000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            while (true){
                try{
                    jedis.watch(key);
                    System.out.println("顾客:" + clientName + "开始抢商品");
                    System.out.println("当前商品的个数："+jedis.get(key));
                    int prdNum = Integer.parseInt(jedis.get(key));// 当前商品个数
                    if(prdNum>0){
                        Transaction transaction = jedis.multi();
                        transaction.set(key, String.valueOf(prdNum - 1));
                        List