发现是字符集的问题
首先、查看mysql的my.cnf,确认为utf8
mysql> show variables like "%char%";
+--------------------------+-------------------------------------+
| Variable_name | Value |
+--------------------------+-------------------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | D:/MySQL Server 5.0/share/charsets/ |
+--------------------------+-------------------------------------+
8 rows in set (0.00 sec)
mysql> show variables like "%coll%";
+----------------------+-------------------+
| Variable_name | Value |
+----------------------+-------------------+
| collation_connection | utf8_general_ci |
| collation_database | latin1_swedish_ci |
| collation_server | utf8_general_ci |
+----------------------+-------------------+
3 rows in set (0.00 sec)
然后将数据库中所有编码方式改为统一：
mysql> set character_set_database=utf8;
Query OK, 0 rows affected (0.00 sec)
mysql> set collation_database= utf8_general_ci
重新查看字符集及数据表字段编码字符是否一致：
运行程序............