D:\a-mysql\mysql-8.0.28-winx64\bin>mysqld --initialize --console
2022-04-04T13:01:40.300632Z 0 [System] [MY-013169] [Server] D:\a-mysql\mysql-8.0.28-winx64\bin\mysqld.exe (mysqld 8.0.28) initializing of server in progress as process 11852
2022-04-04T13:01:40.302034Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting.
2022-04-04T13:01:40.302039Z 0 [ERROR] [MY-013236] [Server] The designated data directory D:\a-mysql\mysql-8.0.28-winx64\data\ is unusable. You can remove all files that the server added to it.
2022-04-04T13:01:40.303641Z 0 [ERROR] [MY-010119] [Server] Aborting
2022-04-04T13:01:40.303998Z 0 [System] [MY-010910] [Server] D:\a-mysql\mysql-8.0.28-winx64\bin\mysqld.exe: Shutdown complete (mysqld 8.0.28) MySQL Community Server - GPL.
把mysql安装目录\data文件夹里的内容清空