java.sql.SQLException: null, message from server: "Host 'xxx' is not allowed to connect的解决方案

1.对所有主机进行访问授权

  GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

    刷新

    FLUSH   PRIVILEGES;

2.更改mysql库下的user表

update user set host = '%' where user = 'root';

FLUSH RIVILEGES