4.0.0org.springframework.bootspring-boot-starter-parent2.1.8.RELEASEcom.lkdemo0.0.1-SNAPSHOTdemoDemo project for Spring Boot1.8org.springframework.bootspring-boot-starter-weborg.springframework.bootspring-boot-devtoolsruntimetrueorg.springframework.bootspring-boot-starter-testtest
        //Redis起步依赖
        org.springframework.bootspring-boot-starter-data-redis2.1.7.RELEASE
        //Redisson起步依赖
        org.redissonredisson-spring-boot-starter3.11.2mysqlmysql-connector-java5.1.48org.springframework.bootspring-boot-maven-plugin

package com.lk.demo.redissionconfig;

import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/*
* Redisson的配置类，提供RedissonClient实例
* */
@Configuration
public class RedissionConfiguration {

    @Bean
    public RedissonClient getRedissionClient(){
        Config config=new Config();
        //集群模式,集群节点的地址须使用“redis://”前缀，否则将会报错。
        //此例集群为3节点，各节点1主1从
        config.useClusterServers().addNodeAddress("redis://192.168.37.134:7001","redis://192.168.37.134:7002",
                "redis://192.168.37.134:7003","redis://192.168.37.134:7004","redis://192.168.37.134:7005","redis://192.168.37.134:7006");
        return Redisson.create(config);
    }
}

package com.lk.demo.redissionconfig;

import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Repository;


import java.util.concurrent.TimeUnit;

/*
* 利用RedissonClient部署及解除分布式锁
* 直接调用lock、unlock方法，此方法只允许1个线程取得锁，其余线程将自旋等待
* */

@Repository
public class HandlerLock{
    @Autowired
    private RedisTemplate rt;
    //@Qualifier("redisson") //在org.redisson.spring.starter包中，可以从配置文件读取redis配置，并返回redissonclient对象
    @Qualifier("getRedissionClient")//指定从本地自写的class中取得实例
    @Autowired
    private RedissonClient redissonClient;
    //实验方法，测试分布式锁
    public void doLock(String lockname){
        //从RedissonClient取得Rlock实例
        RLock rlock=redissonClient.getLock(lockname);
        //尝试取锁，有效期为3s，到期后自动释放。如果取得锁继续执行。取锁失败则自旋。
        //亦可使用rlock.tryLock（）方法，此方法也为尝试取锁，并返回boolean结果
        rlock.lock(3,TimeUnit.SECONDS);
        //以下为测试业务代码，
        System.out.println(Thread.currentThread().getName()+"取得锁");
        int store=Integer.valueOf(rt.opsForValue().get("store"));
        if(store>0)
        {
            System.out.printf("售出1,当前库存为%dn",--store);
            rt.opsForValue().set("store",String.valueOf(store));
        }else
            System.out.println("已售完，下次再来吧");
        //业务完成，释放锁
        rlock.unlock();
        System.out.println("解锁");
    }
}

@Controller
public class Controllerdemo {
    @Autowired
    private HandlerLock handlerLock;
    @RequestMapping("/hello")
    @ResponseBody
    public void demo(){
        handlerLock.doLock("luking");
    }

}