权限问题，授权给 root 所有sql 权限
在Navicat for MySQL中按F6进入命令列界面
mysql> grant all privileges on *.* to root@"%" identified by ".";
mysql> flush privileges;
java.sql.SQLException: The user specified as a definer ('root'@'%') does not exist
原文：https://www.cnblogs.com/hskw/p/9290678.html