redis分布锁

配置 Redisson 连接

在 Spring Boot 项目的配置文件 application.yml 中添加 Redisson 配置：

spring:
  data:
    redis:
      host: localhost
      port: 6379
      database: 0
redisson:
  codec: org.redisson.codec.JsonJacksonCodec
  single-server-config:
    address: "redis://${spring.data.redis.host}:${spring.redis.port}"
    database: "${spring.data.redis.database}"
    password: "${spring.data.redis.password}"

5.3 编写分布式锁代码类

import jakarta.annotation.Resource;
import org.redisson.Redisson;
import org.redisson.api.RLock;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

@Service
public class RedissonLockService {
    @Resource
    private Redisson redisson;

    /**
     * 加锁
     *
     * @param key     分布式锁的 key
     * @param timeout 超时时间
     * @param unit    时间单位
     * @return
     */
    public boolean tryLock(String key, long timeout, TimeUnit unit) {
        RLock lock = redisson.getLock(key);
        try {
            return lock.tryLock(timeout, unit);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            return false;
        }
    }

    /**
     * 释放分布式锁
     *
     * @param key 分布式锁的 key
     */
    public void unlock(String key) {
        RLock lock = redisson.getLock(key);
        lock.unlock();
    }
}