解决MySQL中文乱码

1.在my.ini里面改
[mysql]

default-character-set=gbk

[mysqld]
default-character-set=utf8
重启服务，然后在mysql client执行下列命令查看，如果有这样的结果就OK
mysql> show variables like 'chara%';
+--------------------------+----------------------------------------------------
-----+
| Variable_name            | Value
     |
+--------------------------+----------------------------------------------------
-----+
| character_set_client     | gbk
     |
| character_set_connection | gbk
     |
| character_set_database   | utf8
     |
| character_set_filesystem | binary
     |
| character_set_results    | gbk
     |
| character_set_server     | utf8
     |
| character_set_system     | utf8
     |
| character_sets_dir       | c:\Program Files\MySQL\MySQL Server 5.0\share\chars
ets\ |
+--------------------------+----------------------------------------------------
-----+
8 rows in set (0.00 sec)

2.连接文件要为url="jdbc:mysql://localhost:3306/MySql?useUnicode=true&characterEncoding=utf-8"

页面的jsp编码也要为utf-8

这样设置之后，不管是在mysql client进行插入数据，还是从jsp，java后台插入数据都不会出现乱码了，查看也不会出现乱码了。

还有如果你之前，建有表之类的，请先删除表在重新建表，务必要保持表的编码和 character_set_database   | utf8的一样，或改变原表的编码，用命令
mysql> show create table person;
+--------+---------------------------------------------------------------------
-------------------------------------------------------------------------------
-----------------------------------------------------------+
| Table  | Create Table

                                                           |
+--------+---------------------------------------------------------------------
-------------------------------------------------------------------------------
-----------------------------------------------------------+
| person | CREATE TABLE `person` (
  `id` int(10) NOT NULL,
  `name` varchar(20) NOT NULL,
  `sex` varchar(8) default NULL,
  `email` varchar(30) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 |
+--------+---------------------------------------------------------------------
-------------------------------------------------------------------------------
-----------------------------------------------------------+
1 row in set (0.00 sec)
可以查看表的编码