redis分布式锁

//解决高并发问题
String locak = "key";
//局部变量，不会存在并发问题
String uuid = UUID.randomUUID().toString();
Boolean aBoolean1 = redisTemplate.opsForValue().setIfAbsent(locak, uuid, 10, TimeUnit.SECONDS);
try {
    //业务逻辑，分布式锁
    System.err.println(aBoolean1);
} finally {
    if (redisTemplate.opsForValue().get(locak).equals(uuid)) {
        redisTemplate.delete(locak);
    }
}

2：redisson主类配置对象:

@Bean
public Redisson redisson(){
    Config config = new Config();
    config.useSingleServer().setAddress("redis://localhost:6379").setDatabase(0);
    return (Redisson) Redisson.create(config);
}

可以直接注入redisson对象:

@Autowired
Redisson redisson;

方法实现:

//创建锁对象
RLock lok = redisson.getLock("lok");

  //创建锁对象
    RLock lok = redisson.getLock("lok");
    
    lok.lock();//相当于setIfAbsent
    //设置锁
    try {
        //业务逻辑，分布式锁
        System.err.println();
    } finally {
        //业务执行完后删除锁
        lok.unlock();
    }
}