比较好的一些 ConcurrentHashMap讲解博客

jdk8 https://blog.csdn.net/jianghuxiaojin/article/details/52006118#commentBox

jdk7、8 https://crossoverjie.top/2018/07/23/java-senior/ConcurrentHashMap/

jdk7 http://www.yuanrengu.com/index.php/2017-01-17.html