修改my.ini文件中的
[mysql]
default-character-set=gbk
[mysqld]
# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=utf8
修改后，重启mysql。结果：
mysql> show variables like 'character_set%';
+--------------------------+-------------------------------------------+
| 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       | D:MySQLMySQL Server 5.5sharecharsets |
+--------------------------+-------------------------------------------+
即使再次打开mysql还是这样的。

修改my.ini文件中的
[mysql]
default-character-set=gbk
[mysqld]
# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=utf8
修改后，重启mysql。结果：
mysql> show variables like 'character_set%';
+--------------------------+-------------------------------------------+
| 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       | D:\MySQL\MySQL Server 5.5\share\charsets\ |
+--------------------------+-------------------------------------------+
即使再次打开mysql还是这样的。

在Mysql数据库的配置文件my.ini中修改两处：
 
[mysql]

default-character-set=utf8
...

[mysqld]
...
# The default character set that will be used when a new schema or table is
# created and no character set is defined
default-character-set=utf8
...
 
重启mysql服务器：
在cmd中:
net stop mysql
net start mysql
 
这样mysql数据库的所有编码都是utf8，就不会再出现中文乱码了。当然，在连接数据库的时候需要这样配置你的URL：
jdbc:mysql:///test?useUnicode=true&characterEncoding=UTF-8

如题这是客户所提出的要求，折腾了两个星期，把公司里的basis喊上和我一起折腾也没折腾出来。不过学习了一些东西分享一下：
1. sap打印过程
 
1. When you have released a document for printing; that is, you have chosen a print option, a spool request is first created. The system differentiates between following print data during the creation of the spool request and stores the data in different places:
¡ Spool request data
This is the administrative information for the request, such as created on, created by, and the output device. This data is stored in the SAP spool database. 
¡ Spool Data
This is the data that is to be printed; that is, the content of the document to be printed. This data is stored in a special data store for temporary sequential data (TemSe). 
2. Only once the document is sent to the output device is the administrative data and the data to be printed combined, and an output request is generated.
To do this, the system converts the device-independent print data in the spool request into the appropriate printer language understood by the output device (for example, POSTSCRIPT, PCL-5).
上面是在http://help.sap.com/saphelp_nw04/helpdata/EN/75/884d6dd23911d299940000e83dd9fc/content.htm上找到的。有兴趣的可以继续研究下ｓａｐ的打印过程。还有两个access method f和g，我认为在gui里可以显示中文的原因是gui可以支持Unicode，这个也有资料证明，不过就不贴了。这也就是为什么我们测试的时候可以打印预览显示中文，因为用的是TemSe里的数据，没有和底层交互。当真正打印因为底层不支持，怎样配置都无法实现。我们还安装notes821519的办法给系统打包，为了能试验下打印access method 为g的方法，因为g的时候没有使用saplpd，折腾了一周，碰到很多问题，最后g方法弄出来了也没实现。
2.破解开发key
因为之前打包的过程中，把系统弄死了，于是还重新安装过系统。开发key的破解就由我来做了，开发key的破解主要是在程序中LSKEYF00找到GET_DEVELOPER_KEY函数，将sy-subrc设置为0即可。具体的步骤可以看http://space.itpub.net/782823/viewspace-332652。感谢stone。
3.smartforms
从smartforms里学到了两点，一是smartforms里要打印中文的话必须在smartsytles里设置一个中文字体，否则无法打印中文，这点和list是不一样的。然后在forms里使用这个字体。还有一点smartforms和styles有一个让我有点惊喜的地方是他们都可以导出和导入为xml文件，看来sap现在真的很开放啊。这也对我们abap方便，以后要用smartforms可以使用以前编辑过的styles。这个还得感谢公司的技术大牛刘侠。