20211114 基于Redis实现分布式锁（使用Redisson框架）

原理图

Redis 相关的四种技术

Jedis
Lettuce（ spring-boot-starter-data-redis 默认引入）
RedisTemplate
Redisson

简单使用

操作步骤

pom.xml 添加依赖

<dependency>
    <groupId>org.redisson</groupId>
    <artifactId>redisson-spring-boot-starter</artifactId>
    <version>3.16.4</version>
</dependency>

application.properties 配置 Redis 连接信息

spring.redis.host=localhost
spring.redis.port=6379
#spring.redis.password=

简单使用类

import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class MyRedisLock {
    @Autowired
    private RedissonClient redissonClient;

    public void testLock() {
        RLock rLock = redissonClient.getLock("redisKey");

        try {
            rLock.lock();

            Thread.sleep(10000000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            if (rLock != null) {
                rLock.unlock();
            }
        }
    }
}

Spring Boot 启动类

@SpringBootApplication
public class RedisLockApplication {
    public static void main(String[] args) {
        ConfigurableApplicationContext applicationContext = SpringApplication.run(RedisLockApplication.class);
        MyRedisLock myRedisLock = applicationContext.getBean(MyRedisLock.class);

        myRedisLock.testLock();
    }
}