redis 实现分布式锁

@RestController
public class RedisLock {
    @Resource
    RedisTemplate<String, Object> redisTemplate;

    @GetMapping("lock/{key}/{value}")
    public String testLock(@PathVariable String key, @PathVariable String value) {
　　　　　// 根据key获取分布式锁,并且设置过期时间
        Boolean aBoolean = redisTemplate.opsForValue().setIfAbsent(key, value, 10, TimeUnit.SECONDS);

        if (aBoolean) {
            try {
                System.out.println("获取到锁");
                TimeUnit.SECONDS.sleep(5);
            } catch (InterruptedException e) {
                e.printStackTrace();
            } finally {
                Boolean unlock = unlockLua(key, value);
                System.out.println(unlock);
            }
        } else {
            System.out.println("未获取到锁");
        }
        return "测试锁";
    }

    public boolean unlockLua(String key, String value) {
        DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>();
        //用于解锁的lua脚本位置
        redisScript.setLocation(new ClassPathResource("unlock.lua"));
        redisScript.setResultType(Long.class);
        //没有指定序列化方式，默认使用上面配置的
        Object result = redisTemplate.execute(redisScript, Collections.singletonList(key), value);
        assert result != null;
        return result.equals(1L);
    }
// 在resources中创建 unlock.lua 加入以下代码

if redis.call('get',KEYS[1]) == ARGV[1] then
    return redis.call('del',KEYS[1])
else
    return 0
end

}