Oracle10g忘记system和sys密码的解决办法

C:\Users\Administrator>sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on 星期五 1月 9 09:59:23 2015

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

SQL> conn /as sysdba
已连接。
SQL> alter user system identified by "manager";

用户已更改。

SQL> alter user sys identified by "manager";

用户已更改。

SQL> alter user system identified by "manager";

用户已更改。

SQL> exit
从 Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options 断开

C:\Users\Administrator>sqlplus

SQL*Plus: Release 10.2.0.1.0 - Production on 星期五 1月 9 10:05:42 2015

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

请输入用户名:  system
输入口令:

连接到:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> select instance_name from v$instance;

INSTANCE_NAME
--------------------------------
imsbase

SQL> exit
从 Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options 断开

C:\Users\Administrator>exit