首先来简单介绍下apache curator。

Apache Curator是Apache ZooKeeper的Java / JVM客户端库，Apache ZooKeeper是一种分布式协调服务。它包括一个高级API框架和实用程序，使Apache ZooKeeper更容易和更可靠。它还包括常见用例和扩展（如服务发现和Java 8异步DSL）的配方。

Curator项目组件

Maven依赖

分布式锁实现

  org.apache.curator
  curator-recipes
  4.1.0

public static void main(String[] args) {
        String zookeeperConnectionString = "localhost:2181";
        RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
        CuratorFramework client = CuratorFrameworkFactory.newClient(zookeeperConnectionString, retryPolicy);
        client.start();
 
        try {
            //创建分布式锁, 锁空间的根节点路径为/curator/lock
            InterProcessMutex lock = new InterProcessMutex(client, "/curator/lock");
            if ( lock.acquire(1000, TimeUnit.SECONDS) )
            {
                try
                {
                    // do some work inside of the critical section here
                    System.out.println("do some work inside of the critical section here");
                }
                finally
                {
                    //完成业务流程, 释放锁
                    lock.release();
                }
            }
 
        } catch (Exception e) {
            e.printStackTrace();
        }
    }