数据库编码，下载的文件名为乱码

项目中需要上传文件。
文件上传成功后页面显示的文件名正常。点击下载后跳出的保存页面所显示的文件名为乱码
不知是否是数据库编码的原因
我用select   *   from   nls_database_parameters;查询结果如下
NLS_LANGUAGE                                            AMERICAN
NLS_TERRITORY                                            AMERICA
NLS_CURRENCY                                            $
NLS_ISO_CURRENCY                                   AMERICA
NLS_NUMERIC_CHARACTERS                    .,
NLS_CHARACTERSET                                 AL32UTF8
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                            10.1.0.2.0