MYSQL添加新用户以及开放对应的表，给用户授权
以jeecg-boot数据库为例：
进入linux系统，
mysql -uroot -pmima
CREATE USER 'jeecgboot'@'%' IDENTIFIED BY 'jeecgboot';
grant all privileges on `jeecg-boot`.* to 'jeecgboot'@'%';
flush privileges;
以jeecg-boot数据库为例：
进入linux系统，
mysql -uroot -pmima
CREATE USER 'jeecgboot'@'%' IDENTIFIED BY 'jeecgboot';
grant all privileges on `jeecg-boot`.* to 'jeecgboot'@'%';
flush privileges;