重置办法如下：打开CMD命令提示符，然后输入下面命令进行重置：

输入sqlplus /nolog,回车

SQL> conn /as sysdba

已连接；

SQL>alter user system identified by 123456;  ---(123456就是重置的密码了)

SQL>alter user sys identified by 123456;

　　SQL>alter user knight identified by 123456;

　　SQL>alter user princess identified by 123456;