乱码情况！！！！

   mysql> show variables like 'character_set_%';
+--------------------------+---------------------------
-----+
| Variable_name            | Value
     |
+--------------------------+---------------------------
-----+
| character_set_client     | utf8
     |
| character_set_connection | utf8
     |
| character_set_database   | utf8
     |
| character_set_filesystem | binary
     |
| character_set_results    | utf8
     |
| character_set_server     | utf8
     |
| character_set_system     | utf8 每次都要输入set names gbk 才不会出现乱码，感觉这样很麻烦啊。