有关oracle 9i中文乱码的问题

谢谢！情况是这样：
1、我是按照书上说明的中文版的安装过程来安装的，安装是字体也没选错，如果真的是您提到的客户端字符集和数据库的字符集不一致的问题，那一定是个普遍问题了。
2、我分别执行两条命令：
SQL> select * from NLS_DATABASE_PARAMETERS;PARAMETER                      VALUE
------------------------------ --------------------------------------------------------------------------------
NLS_LANGUAGE                   AMERICAN
NLS_TERRITORY                  AMERICA
NLS_CURRENCY                   $
NLS_ISO_CURRENCY               AMERICA
NLS_NUMERIC_CHARACTERS         .,
NLS_CHARACTERSET               ZHS16GBK
NLS_CALENDAR                   GREGORIAN
NLS_DATE_FORMAT                DD-MON-RR
NLS_DATE_LANGUAGE              AMERICAN
NLS_SORT                       BINARY
NLS_TIME_FORMAT                HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT           DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT             HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT        DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY              $
NLS_COMP                       BINARY
NLS_LENGTH_SEMANTICS           BYTE
NLS_NCHAR_CONV_EXCP            FALSE
NLS_NCHAR_CHARACTERSET         AL16UTF16
NLS_RDBMS_VERSION              9.0.1.1.120 行 已选择SQL> select * from V$NLS_PARAMETERS;PARAMETER                                                        VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_LANGUAGE                                                     SIMPLIFIED CHINESE
NLS_TERRITORY                                                    CHINA
NLS_CURRENCY                                                     RMB
NLS_ISO_CURRENCY                                                 CHINA
NLS_NUMERIC_CHARACTERS                                           .,
NLS_CALENDAR                                                     GREGORIAN
NLS_DATE_FORMAT                                                  DD-MON-RR
NLS_DATE_LANGUAGE                                                SIMPLIFIED CHINESE
NLS_CHARACTERSET                                                 ZHS16GBK
NLS_SORT                                                         BINARY
NLS_TIME_FORMAT                                                  HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT                                             DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT                                               HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT                                          DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY                                                RMB
NLS_NCHAR_CHARACTERSET                                           AL16UTF16
NLS_COMP                                                         BINARY
NLS_LENGTH_SEMANTICS                                             BYTE
NLS_NCHAR_CONV_EXCP                                              FALSE19 行 已选择上面NLS_LANGUAGE好像是不一致，不知该如何修改，我试图在OEM中更改spfile文件，把nls_language改为SIMPLIFIED CHINESE，但被允许。请问，应该如何更改？另外，我注意到在Oracle 9.2.0.1.0上nls_language也同样是不一致的，但它没有问题啊。
3）我看了别的一篇文章，说的是linux下oracle中文乱码的问题，但它说到的是jdk支持的中文字体的问题，不知我的是不是这个情况。
4）我出现的乱码主要是各个对话框中的说明内容，而不是数据库内的数据