查找DB的字符
select * from nls_database_parameters t where t.parameter='NLS_CHARACTERSET';
SELECT USERENV ('language') FROM DUAL;
查找windows
HKEY_LOCAL_MACHINEsoftwareoracle** NLSLANG值
两个的值要一致
参考：
1. http://blog.csdn.net/dracotianlong/article/details/8270136
2.http://www.cnblogs.com/brainstormlee/archive/2011/07/14/2106250.html