redission实现分布式锁实例

Sure! Here's an example of how to implement distributed locks using Redisson in Java:

import org.redisson.Redisson;
import.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;

public class DistributedLockExample {
    private static final String LOCK_KEY = "my_lock";

    public static void main(String[] args) {
        // Create Redisson configuration
        Config config = new Config();
        config.useSingleServer().setAddress("redis://localhost:6379");

        // Create Redisson client
        RedissonClient redisson = Redisson.create(config);

        // Get the distributed lock instance
        RLock lock = redisson.getLock(LOCK_KEY);

        try {
            // Acquire the lock
            lock.lock();

            // Perform your critical section here

        } finally {
            // Release the lock
            lock.unlock();
        }

        // Shutdown Redisson client
        redisson.shutdown();
    }
}

In the example above, we first create a Redisson configuration object and set the address of our Redis server. Then, we create a Redisson client using this configuration. We use the `getLock` method to obtain a distributed lock instance by specifying the lock key.

Inside the `try` block, we acquire the lock using the `lock` method. This will make sure that only one thread can enter the critical section at a time. After performing the critical section operations, we release the lock using the `unlock` method inside a `finally` block to ensure that the lock is always released, even if an exception occurs.

Finally, we shutdown the Redisson client to release any resources held by it.

Note that you need to have Redis server running and accessible at the specified address for this example to work properly.