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.

Note
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.jav“, since Hibernate 3.6, both XML mapping and annotation are sharing the same “org.hibernate.cfg.Configuration” class.

Bye bye AnnotationConfiguration

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.