说明：备份的数据库名称：mydb；mysql和tomcat 都配置好环境变量；
数据库位置?D:\Program Files\mysql-5.6.43-winx64\data\mydb；
备份路径：D:\mysql_beifen\data；
bat文件代码：
net stop mysql
xcopy "D:\Program Files\mysql-5.6.43-winx64\data\mydb\*.*" "D:\mysql_beifen\data\%date:~0,4%%date:~5,2%%date:~8,2%\mydb"
net start mysql
ping -n 30 127.0.0.1>nul?
call %CATALINA_HOME%\bin\shutdown.bat?
ping -n 30 127.0.0.1>nul?
call %CATALINA_HOME%\bin\startup.bat