AbstractQueuedSynchronizer

一、共享锁

https://blog.youkuaiyun.com/fxkcsdn/article/details/86701663

二、独占锁

https://www.cnblogs.com/micrari/p/6937995.html
https://blog.youkuaiyun.com/cowbin2012/article/details/89736065
https://www.cnblogs.com/xijiu/p/14633700.html
https://www.cnblogs.com/waterystone/p/4920797.html