plsql中显示正常,查询到的结果乱码 1.获得服务端编码 select * from nls_database_parameters where parameter ='NLS_CHARACTERSET'; select userenv('language') from dual; 2.获得客户端编码 select * from nls_instance_parameters where parameter='NLS_LANGUAGE'; 3.检查环境变量编码 4.将程序中编码设置成服务端一致