Redis_03_Java Jadis实现事务和乐观锁

1.Jedis是Redis官方推荐的Java连接开发工具。要在Java开发中使用好Redis中间件，必须对Jedis熟悉才能写成漂亮的代码

1.连接测试

pom.xml

        <!--jedis-->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.2.0</version>
        </dependency>
        <!--fastjson-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.75</version>
        </dependency>

public class RedisStringJava {
    public static void main(String[] args) {
        //连接本地的 Redis 服务
        Jedis jedis = new Jedis("47.100.***.***", 6379);
         System.out.println(jedis.ping());
    }
}

2.Jedis事务的实现

public class RedisTx {
    public static void main(String[] args) {

        Jedis jedis = new Jedis("47.100.***.***", 6379);
        jedis.flushAll();
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("age", 20);
        jsonObject.put("name", "哈哈");

        String res = jsonObject.toJSONString();
        //监听jedis 乐观锁实现
        jedis.watch(res);
        //开启事务
        Transaction transaction = jedis.multi();
        try {
            Response<String> user = transaction.set("user", res);
            //发生异常事务回滚
            int a = 1 / 0;
            //提交事务
            transaction.exec();
        } catch (Exception e) {
            //回滚
            transaction.discard();
        } finally {
            System.out.println(jedis.get("user"));
            jedis.close();
        }
    }

 3.redis实现分布式锁