运行——sqlplus /nolog 输入命令:conn sys / orcl assysdba; 输入命令:alter user systemaccount unlock;——对system用户密码进行解锁 输入命令:conn system / orcl; 输入命令:alter user systemidentified by (orcl)新密码(没有修改密码前Oracle初始密码为orcl。); 输入命令:conn system / orcl