https://www.cnblogs.com/xd502djj/archive/2010/09/27/1837064.html
查询 oracle 字符集:
select userenv('language') from dual;
linux 设置:
export NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1
windows 设置:
set NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1