reset admin password for weblogic v10.3

scenario 1, sometimes we might forget the admin console password.
scenario 2, we want to skip to key in username/password while admin console startup

go to <weblogic root folder>/user_projects/domains/<your domain>/servers/<your domain>AdminServer/

to add a folder /security and add a new property boot.properties

the content in this property would be
username=<your username to access admin console>
password=<your password to access admin console>

then, restart weblogic , weblogic will encrypt username/password in boot.properties, the content maybe:

#Mon May 10 12:56:22 SGT 2010
password={3DES}AWQsP+YSimYA7Je1swu9tQ/=/=
username={3DES}AWQsP+YSimYA7Je1swu9tQ/=/=

(maybe you need to restart weblogic again if you found some exception. then everything will be fine.)