Spring Boot + Redisson 封装分布式锁

目标：一行代码调用，简单粗暴。
基操：自动加锁，自动解锁，自动处理异常，自动处理锁超时等。

安装

redis + redisson

        <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency><dependency><groupId>org.redisson</groupId><artifactId>redisson-spring-boot-starter</artifactId><version>3.39.0</version></dependency>

hutool 工具类

        <dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.16</version></dependency>

配置

spring:data:redis:host: xxxport: 6379password: xxxdatabase: x

配置类

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;/*** 方便获取 Spring IOC 实例** @author jason*/
@Configuration
@Import(cn.hutool.extra.spring.SpringUtil.class)
public class BeanConf {
}

工具类

import cn.hutool.core.thread.ThreadUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.extra.spring.SpringUtil;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;/*** Redisson 操作工具类** @author jason*/
@Slf4j
@Component
public class RedissonUtil {/*** 锁默认超时时间为（单位：秒）*/private static final long LEASE_TIME = 10;@Autowiredprivate RedissonClient redissonClient;public static RedissonUtil instance() {return SpringUtil.getBean(RedissonUtil.class);}/*** 获取可重入锁* <p>* 读写锁（RReadWriteLock）包括读锁和写锁两部分：* 读锁（Read Lock）：允许多个读线程同时访问，但写线程会被阻塞。* 写锁（Write Lock）：独占锁，保证同时只有一个写线程访问，同时也会阻塞其他读线程。*/public static RLock getClint(String key) {return instance().redissonClient.getLock(key);}/*** 加锁*/public static void lock(String key) {getClint(key).lock(LEASE_TIME, TimeUnit.SECONDS);}/*** 解锁*/public static void unLock(String key) {if (getClint(key).isLocked()) {getClint(key).unlock();}}/*** 分布式锁，默认超时时间为 LEASE_TIME*/public static <T> T lock(String lockKey, Supplier<T> supplier) {lockKey = "distributed:" + lockKey;log.info("加锁开始，线程：{}", ThreadUtil.currentThreadGroup().getName());RedissonUtil.lock(lockKey);log.info("加锁结束，线程：{}", ThreadUtil.currentThreadGroup().getName());try {log.info("执行代码块开始，线程：{}", ThreadUtil.currentThreadGroup().getName());T t = supplier.get();log.info("执行代码块结束，线程：{}", ThreadUtil.currentThreadGroup().getName());return t;} catch (Exception e) {log.error(StrUtil.format("执行异常，线程：{}", ThreadUtil.currentThreadGroup().getName()), e);} finally {RedissonUtil.unLock(lockKey);log.info("释放锁结束，线程：{}", ThreadUtil.currentThreadGroup().getName());}return null;}}

测试

    @GetMapping("/lock/{key}")public String lock(@PathVariable String key) {return RedissonUtil.lock(key, () -> {ThreadUtil.sleep(30 * 1000);return "出参";});}

2024-12-26T11:07:41.307 xxx.util.RedissonUtil    : 加锁开始，线程：main
2024-12-26T11:07:41.315 xxx.util.RedissonUtil    : 加锁结束，线程：main
2024-12-26T11:07:41.315 xxx.util.RedissonUtil    : 执行代码块开始，线程：main
2024-12-26T11:08:11.323 xxx.util.RedissonUtil    : 执行代码块结束，线程：main
2024-12-26T11:08:11.338 xxx.util.RedissonUtil    : 释放锁结束，线程：main