大牛笔记

https://github.com/heibaiying/BigData-Notes/blob/master/notes/%E5%A4%A7%E6%95%B0%E6%8D%AE%E5%AD%A6%E4%B9%A0%E8%B7%AF%E7%BA%BF.md

https://github.com/Snailclimb/JavaGuide