mysql-怎样修改数据库的默认编码，想把它改成utf8的？

+--------------------------+----------------------------------------------+
| Variable_name | Value |
+--------------------------+----------------------------------------------+
| character_set_client | gbk |
| character_set_connection | gbk |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | gbk |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | J:\MySql\mysql-5.6.27-winx64\share\charsets\ |
+--------------------------+----------------------------------------------+

这是现在的编码格式？
有哪些步骤，是在命令行（mysql.exe）改吗？在可视化管理界面能改吗？