Redis SETNX命令在Spring Cloud中的分布式锁用法详解

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
@Component
public class DistributedLock {
    private static final String LOCK_KEY = "order_lock";
    private static final int EXPIRE_TIME = 10; // 锁的过期时间，单位：秒
    @Autowired
    private StringRedisTemplate redisTemplate;
    public boolean acquireLock() {
        Boolean success = redisTemplate.opsForValue().setIfAbsent(LOCK_KEY, "1");
        if (success != null && success) {
            redisTemplate.expire(LOCK_KEY, EXPIRE_TIME, TimeUnit.SECONDS);
            return true;
        }
        return false;
    }
    public void releaseLock() {
        redisTemplate.delete(LOCK_KEY);
    }
}

@Service
public class OrderService {
    @Autowired
    private DistributedLock distributedLock;
    public void submitOrder(String orderId) {
        if (distributedLock.acquireLock()) {
            try {
                // 执行订单提交的逻辑
                System.out.println("成功获取到分布式锁，开始提交订单");
                System.out.println("订单ID：" + orderId);
                // TODO: 执行订单提交的相关逻辑
            } finally {
                distributedLock.releaseLock();
            }
        } else {
            System.out.println("获取分布式锁失败，无法提交订单");
        }
    }
}