一些较好的博文收录

Dubbo 一篇文章就够了：从入门到实战：https://segmentfault.com/a/1190000019896723

Java多线程相关：https://www.cnblogs.com/dolphin0520/category/1426288.html
线程池的源码解析：https://www.jianshu.com/p/a977ab6704d7

java四种引用：https://blog.csdn.net/u011101295/article/details/105712208
https://www.zhihu.com/question/37401125