Maven 3 + Hibernate 3.6 + Oracle 11g Example (Annotation)_maven安装hibernate+oracle11g-优快云博客

本文介绍如何将 Hibernate 3.6 的 XML 映射转换为 JPA 注解映射，并提供了一个使用 Maven、JDK 1.6、Hibernate 3.6.3 和 Oracle 11g 的示例项目。通过更新配置文件和实体类来完成从 XML 到注解的迁移。

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

Bye bye AnnotationConfiguration