[系统运维]解决macOS启动SpringBoot很慢的问题

1. 问题

查看打印的日志发现，第一行出现一个warn警告：
inetaddress.getlocalhost().gethostname() took 5005 milliseconds to respond. please verify your network configuration (macos machines may need to add entries to /etc/hosts).
意思是主机名地址解析花了5秒多，请检查你的网络配置(macos的机器名可能需要加入/etc/hosts中)。

2. 解决

sakura@Sakura  ~  hostname
Sakura.local        # 得到你的主机名
sakura@Sakura  ~  sudo vim /private/etc/hosts   # 修改/etc/hosts文件

原内容：

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1       localhost 
255.255.255.255 broadcasthost
::1             localhost
# Added by Docker Desktop
# To allow the same kube context to work on the host and the container:
127.0.0.1 kubernetes.docker.internal
# End of section

修改后的内容：

原内容：
```shell
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1       localhost Sakura.local   //注意这里
255.255.255.255 broadcasthost
::1             localhost Sakura.local   //注意这里
# Added by Docker Desktop
# To allow the same kube context to work on the host and the container:
127.0.0.1 kubernetes.docker.internal
# End of section

最后 Esc :wq保存即可
启动速度瞬间变快