Maven 3 + Hibernate 3.6 + Oracle 11g Example (Annotation)
This tutorial will reuse and modify the previous Hibernate3.6 XML mapping tutorial, but replace the Hibernate mapping file (hbm) with Hibernate / JPA Annotation code.
Technologies in this article :
- Maven 3.0.3
- JDK 1.6.0_13
- Hibernate 3.6.3.final
- Oracle 11g
1. pom.xml
No change in pom.xml
file, all previous Hibernate3.6 XML mapping tutorial dependency can be reused.
Since Hibernate 3.6, the annotation is integrated into the
hibernate-core.jar
module. In previous version, for example, Hibernate 3.2, you need to include extra hibernate-annotations.jar
to make it works.
2. Delete Hibernate Mapping file (hbm)
Delete the “DBUser.hbm.xml
” file, it’s no longer require.
3. Update Model
Update “DBUser.java
“, puts JPA annotation code inside.
File : DBUser.java
package com.mkyong.user;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@Table(name = "DBUSER")
public class DBUser implements java.io.Serializable {
private int userId;
private String username;
private String createdBy;
private Date createdDate;
public DBUser() {
}
public DBUser(int userId, String username, String createdBy,
Date createdDate) {
this.userId = userId;
this.username = username;
this.createdBy = createdBy;
this.createdDate = createdDate;
}
@Id
@Column(name = "USER_ID", unique = true, nullable = false, precision = 5, scale = 0)
public int getUserId() {
return this.userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
@Column(name = "USERNAME", nullable = false, length = 20)
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
@Column(name = "CREATED_BY", nullable = false, length = 20)
public String getCreatedBy() {
return this.createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
@Temporal(TemporalType.DATE)
@Column(name = "CREATED_DATE", nullable = false, length = 7)
public Date getCreatedDate() {
return this.createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
}
4. Update Hibernate Configuration File
Update “hibernate.cfg.xml
“, replace the “mapping resource” with “mapping class”
Update hibernate.cfg.xml, from this :
<hibernate-configuration>
<session-factory>
<!-- ..... -->
<mapping resource="com/mkyong/user/DBUser.hbm.xml"></mapping>
</session-factory>
</hibernate-configuration>
To this :
<hibernate-configuration>
<session-factory>
<!-- ..... -->
<mapping class="com.mkyong.user.DBUser"></mapping>
</session-factory>
</hibernate-configuration>
5. Hibernate Utility
No update on “HibernateUtil.java
“, since Hibernate 3.6, both XML mapping and annotation are sharing the same “org.hibernate.cfg.Configuration” class.
Read this – AnnotationConfiguration is deprecated in Hibernate 3.6
6. Review Final Project Structure
Review your project structure :
7. Run It
No update on “App.java
“, as well, just run it, and you should be seeing the same result as previous Hibernate3.6 XML mapping tutorial.
Great tutorial. Best one found on the net.
Just one problem upon launching. File “hibernate.cfg.xl” cannot be found in “src/main/resources” folder. Here’s the error:
Initial SessionFactory creation failed.org.hibernate.HibernateException: /hibernate.cfg.xml not found
Exception in thread “main” java.lang.ExceptionInInitializerError
at com.mkyong.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:17)
at com.mkyong.util.HibernateUtil.(HibernateUtil.java:8)
at com.mkyong.App.main(App.java:11)
Caused by: org.hibernate.HibernateException: /hibernate.cfg.xml not found
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:1497)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1519)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1506)
at com.mkyong.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
… 2 more
Any hint?
Thanks. Bye.
Thanks it was helpful.
great post, very fast and simple thanks a lot 🙂 i have a question: how to use log4j instead of jboss logger since hibernate requires the later?
Great job and very useful. THANKS
Gr8 work, you have always been very helpful ..Thanks
Hi,
DBUser.java:[11,1] annotations are not supported in -source 1.3
(use -source 5 or higher to enable annotations)
@Entity
I am taking this error when I run mvn compile. I am using ubuntu 12.04, openjdk-7-jdk
I googleit but I didn’t found anything about it. Can anyone help me ?
I think it is taking jre 1.3 version. Hence saying annotation not supported, use jre 5 or higher. Open dos & type java -version or check your environmental var in system->props.
You dont use com.mkyong.util.HibernateUtil.shutdown() in the App class ??
Great post! one question, how do you annotate multi columns unique key? Thanks!
this is good post no doubt.
it can be great if explanation of annotations is given.
and it should be there
Best tutorials I have seen on the topic. Thanks.
It’s not incrementing , beside it starts with zero and after that no increment (Exception in thread “service” org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update)
Thank You
This is a great post! Thank you very much!