Composite Key with Hibernate

Question

In order to generate the next SQL code:

create table users (
    user_name varchar(15) not null primary key, 
    user_pass varchar(15) not null);

create table         


        

Answer 1

Look in the hibernate docs for the 'composite-id' element. The following may at least give you the intent -- replace your id element with:

Note that it's strongly recommended to instead make your ID a separate class ('component') that implements hashCode and equals properly, and that is Serializable. Otherwise you'll have only very awkward ways to lookup your object using session.get() or session.load().