redis实现最简单的锁

<dependency>
   <groupId>redis.clients</groupId>
   <artifactId>jedis</artifactId>
   <version>3.2.0</version><!--版本号可根据实际情况填写-->
</dependency>

public static void main(String[] args) {
    Jedis jedis = new Jedis("127.0.0.1");
    jedis.set("key1","value2");
    System.out.println( jedis.get("key1"));//value2

    String set = jedis.set("key1", "value1", SetParams.setParams().nx());//加锁
    System.out.println("返回set："+set);//null
    System.out.println(jedis.get("key1"));//value2
  jedis.del("key1");//删除key
    String set2 = jedis.set("key1", "value2", SetParams.setParams().nx());//加锁
    System.out.println(set2);//ok
    System.out.println(jedis.get("key1"));//value2

}