MySQL汉字乱码

1、show variables like 'char%'

2、

set character_set_client = utf8;

set character_set_server = utf8;

set character_set_connection = utf8;

set character_set_database = utf8;

set character_set_results = utf8;

set collation_connection = utf8_general;

set collation_database = utf8_general;

set collation_server = utf8_general;

3、alter table tb（已经创建了的表） convert to charset gbk;