I've read the documentation.
But I don't know to use HQL.

For example,
SQL:
"select * from account where account = '" + account "' and password = '" + password + "'"

HQL
Query query = session.createQuery("select account from Account account where account.account = '" + account + "' and accont.password = '" + password + "'");
But it doesn't work.

Any ideals?
Thanks.

In Hibernate, you query using objects and properties instead of tables and columns. You wrote SQL not HQL.

Try the following code which uses named parameters:

String query = "from Account a where a.account=:account and a.password=:password";

Query q = session.createQuery(query);
q.setString("account", account);
q.setString("password",password);

FYI, I am assuming that you have mapped Account Object to the Account table in your database. If not, then do that before trying the above example.

Thanks!!