![]() ![]() But note that this references the user_id column, and it no longer uses the Also, on the field that references the User, we've added the annotation, which indicates that the primary key values will be copied from the User entity. We still have to define an field in the Address class. We've also added the annotation, which indicates that the primary key of the User entity is used as the foreign key value for the associated Address entity. The mappedBy attribute is now moved to the User class since the foreign key is now present in the address table. Private Long = "user", cascade = Address address Certain java constructs, such as hibernate and the Service Provider Interface require a no-args constructor. SessionFactory = new AnnotationConfiguration().configure().Notice that our definitions change only slightly: = "users") Private static SessionFactory sessionFactory Id GeneratedValue (generator 'uuid') GenericGenerator (name 'uuid', strategy 'uuid') Column (name 'uuid', unique true) private String uuid Using .UUIDHexGenerator which does not generate IETF RFC 4122 compliant UUID values consider using. So, your HibernateUtil might look like this instead: Using Hibernate UUIDGenerator via annotations. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java. It turns out that when using annotations you need to use AnnotationConfiguration, which is a subclass of Configuration, specific to annotations. If you did all that and stopped there, you might see an exception like this: Exception in thread "main" Īt .domain.HibernateUtil.(HibernateUtil.java:15)Īt .(Main.java:12)Ĭaused by: : An AnnotationConfiguration instance is required to use Īt .parseMappingElement(Configuration.java:1600)Īt .parseSessionFactory(Configuration.java:1555)Īt .doConfigure(Configuration.java:1534)Īt .doConfigure(Configuration.java:1508)Īt .configure(Configuration.java:1428)Īt .configure(Configuration.java:1414)Īt .domain.HibernateUtil.(HibernateUtil.java:13)Īnd, like me, you would be puzzled. To update your file, you’ll want to change lines like this: You’ll have something that looks like this: = “USERS”) There are many fine resources available on JPA annotations so I’m not going to discuss this in detail. To add the right jars, I’m using Maven and added the following additional dependencies:
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