Java使用redisson实现分布式锁的示例详解

<dependency>
    <groupId>org.redisson</groupId>
    <artifactId>redisson</artifactId>
    <version>3.15.2</version>
</dependency>

import java.lang.annotation.*;
​
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface DistributedLock {
    String value() default "";
}

import org.redisson.Redisson;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
​
@Aspect
@Component
public class DistributedLockAspect {
    @Autowired
    private RedissonClient redissonClient;
​
    @Around("@annotation(distributedLock)")
    public Object lockAndExecute(ProceedingJoinPoint joinPoint, DistributedLock distributedLock) throws Throwable {
        String lockName = distributedLock.value();
        RLock lock = redissonClient.getLock(lockName);
        try {
            lock.lock();
            return joinPoint.proceed();
        } finally {
            lock.unlock();
        }
    }
}

@Service
public class MyService {
    @DistributedLock("myLock")
    public void myMethod() {
        // 在这里执行需要加锁的逻辑...
    }
}

@SpringBootApplication
@EnableAspectJAutoProxy
public class MyApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}