mysql：https://blog.csdn.net/qq_34354257/article/details/90475791
问题一：The GPG keys listed for the "MySQL 5.7 Community Server" repository are already installed but they are not correct for this package.
https://blog.csdn.net/b_ingram/article/details/122761408
问题二：Host XXX is not allowed to connect to this MySQL server
https://blog.csdn.net/h985161183/article/details/82218710

redis：https://www.cnblogs.com/lqblods/p/12098057.html
问题一：后台启动
https://blog.csdn.net/weixin_39593985/article/details/90665694
问题二：无法远程连接
https://blog.csdn.net/sinat_29774479/article/details/79928682
问题三：关闭redis
https://blog.csdn.net/abc231218/article/details/79599674

jdk：https://blog.csdn.net/pdsu161530247/article/details/81582980

maven：https://www.cnblogs.com/cannel/p/11104190.html

nacos：https://nacos.io/en-us/docs/quick-start.html
问题一：修改mysql地址账号密码
https://blog.csdn.net/qq_40523572/article/details/89364340

nginx：