在开始菜单点击‘运行’，输入‘cmd’，打开命令提示窗口

输入 sqlplus /nolog;

sql> conn / as sysdba

已连接。
sql> alter user system identified by passwordzwdfc;
用户已更改。
sql> alter user sys identified by passwordzwdfc;
sql> exit
从Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning,OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production中断开