Problem detected!
21:57:44 [mysql] Port 3306 in use by ""E:\MySQL\bin\mysqld" --defaults-file="E:\MySQL\my.ini" MySQL"!
21:57:44 [mysql] MySQL WILL NOT start without the configured ports free!
21:57:44 [mysql] You need to uninstall/disable/reconfigure the blocking application
21:57:44 [mysql] or reconfigure MySQL and the Control Panel to listen on a different port
修改了端口还是报这个错误。
解决办法：
1.cmd-->regedit 找到 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MySQL]
2.修改ImagePath的键值为XAMPP中的mysql的安装路径 （原来的键值---C:\Program Files (x86)\MySQL\MySQL Server 5.7\bin\mysqld
改为--C:\xampp\mysql\bin\mysqld）
3.修改完成就可以启动了