Spring Hibernate hbm2ddl.auto & Annotations

Spent Yesterday and today drawing up a schema for www.justcars.ie Ireland’s newest and hottest place to source your car.

To create this schema I wanted to get hibernate generate it via the POJOs I create. I am using annotations. So here is what i did:

Step One:

Create the POJO:

@Entity
public class Manufacteur {

@Id
private Integer manufacteurlId;

…..

}

Make sure you import javax.persistence.*; & not the more intuitive sounding hibernate one .

Step Two:

I am using a hibernate.cfg.xml for neatness:

org.gjt.mm.mysql.Driver
yourPassword
jdbc:mysql://localhost:3306/YourScehma
YourUsername
jYourScehma
org.hibernate.dialect.MySQL5Dialect
true
true
create-drop

Change the pieces in bold as appropriate.

Step Three servlet:

Ensure your session factory bean if you are using annotations is using the AnnotationSession otherwise you will get an “Annotation Instance required ” exception.

Point the session factory to your hibernate.cfg.xml

/WEB-INF/hibernate.cfg.xml
true

Step Four:

Depoly & hey Presto hibernate is creating your schema!