http://blog.itpub.net/12679300/viewspace-2150667/ 我一直在的处理方式是让更新oracle的客户端.
[oracle@rdb02 admin]$ cat sqlnet.ora
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
SQLNET<span "="">.ALLOWED_LOGON_VERSION_SERVER=8
SQLNET.ALLOWED_LOGON_VERSION_CLIENT=8
SQL> ALTER USER system IDENTIFIED BY 12345678;
SQL> select username,password,PASSWORD_VERSIONS from dba_users where username in (‘SCOTT‘,‘SYSTEM‘)
USERNAME PASSWORD PASSWORD_VERSIONS
-------------------- -------------------- --------------------
SYSTEM 11G 12C #要求客户端的版本最低为11.2.0.3
SCOTT 10G 11G 12C #要求客户端的版本最低为10
[转帖]ORACLE 12C连接时报ORA28040和ORA01017的错误
原文：https://www.cnblogs.com/jinanxiaolaohu/p/11750472.html