转载: https://www.bilibili.com/video/BV1r5411V7Sb/?spm_id_from=333.999.0.0&vd_source=46d50b5d646b50dcb2a208d3946b1598 http://ifeve.com/慢谈-redis-实现分布式锁-以及-redisson-源码解析/