http://man.linuxde.net/mkdir
https://blog.csdn.net/Crystalqy/article/details/80493414
https://blog.csdn.net/sunguannan/article/details/78966903 避免git用户名和密码的重复输入
https://blog.csdn.net/qq_21358401/article/details/79266337 homebrew 安装jdk
https://www.cnblogs.com/zhouhongfu1991/p/5967807.html jdk 环境变量配置
https://blog.csdn.net/deliciousion/article/details/78046007

Mac安装jdk及配置环境变量_jdkmacpeizhi-CSDN博客  安装jdk和jdk环境变量配置

maven环境变量配置zsh: command not found: mvn。-CSDN博客