ORA-28000: the account is locked

SQL> conn hr/hr （hr用户名/ hr 密码）
ERROR:
ORA-28000: the account is locked
Warning: You are no longer connected to ORACLE.
解决方案：
SQL> conn / as sysdba
Connected.
SQL> alter user hr identified by hr account unlock;(解锁新用户）
User altered.
SQL> conn hr/hr
Connected.