Redis的实现（java）

日常操作

public static void main(String[] args)
    {
        Jedis jedis = new Jedis("192.168.222.129", );

        //1、开启事务
        Transaction transaction = jedis.multi();

        //2、执行
        transaction.set("k4", "v4");
        transaction.set("k5", "v5");

        //3、提交事务
        transaction.exec();

        //4、放弃事务
        //transaction.discard();
    }

加锁事务

 public static void main(String[] args)
    {
        TestTx testTx = new TestTx();
        boolean retValue = testTx.transMethod();
        System.out.println("main=====return value " + retValue);
    }

    private boolean transMethod()
    {
        // TODO Auto-generated method stub
        Jedis jedis = new Jedis("192.168.222.129", );
        int balance; //可用余额
        int debt;//欠额
        int pay = ;//实际话费金额

        jedis.watch("balance");
        balance = Integer.parseInt(jedis.get("balance"));
        if (balance < pay)
        {
            jedis.unwatch();
            System.out.println("您的余额不足");
            return false;
        }
        else
        {
            System.out.println("============开会消费========");
            //1、开启事务
            Transaction transaction = jedis.multi();
            //2、执行
            transaction.decrBy("balance", pay);
            transaction.incrBy("debt", pay);
            //3、提交事务
            transaction.exec();
            balance = Integer.parseInt(jedis.get("balance"));
            debt = Integer.parseInt(jedis.get("debt"));

            System.out.println("余额： " + balance);
            System.err.println("花费： " + debt);
            return true;
        }
    }

结果

============开会消费========
余额：
main=====return value true
花费：