Mac安装java8

http://blog.csdn.net/lg767201403/article/details/71601569

安装Maven
https://www.jianshu.com/p/191685a33786
https://www.mkyong.com/maven/install-maven-on-mac-osx/

open VPN

https://mba811.gitbooks.io/web-study/content/vpn/vpn4.html