cmd命令行输入：
sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on 星期二 10月 17 15:42:58 2017
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连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;
配置文件已更改
SQL> alter user 用户名 identified by 密码 account unlock;