在mysql安裝完成之后，使用命令 net start mysql 出現錯誤!
打開mysql/data/目錄下的出錯文件
2020-08-15T03:27:08.908407Z 0 [System] [MY-010116] [Server] D:\Program Files (x86)\mysql-8.0.16-winx64\bin\mysqld.exe (mysqld 8.0.16) starting as process 14724
2020-08-15T03:27:08.930358Z 1 [ERROR] [MY-011011] [Server] Failed to find valid data directory.
2020-08-15T03:27:08.930701Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2020-08-15T03:27:08.936536Z 0 [ERROR] [MY-010119] [Server] Aborting
2020-08-15T03:27:08.937821Z 0 [System] [MY-010910] [Server] D:\Program Files (x86)\mysql-8.0.16-winx64\bin\mysqld.exe: Shutdown complete (mysqld 8.0.16) MySQL Community Server - GPL.
原因是data 文件夾初始化失敗
重新初始化
mysqld --initialize --user=mysql --console
mysql-u root -p 登錄時用初始化過程中生成的密碼，然后修改數據庫連接密碼
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'xxxxxx';