hibernate3.4 注解 oracle简单入门例子

1.下载hibernate-distribution-3.3.2.GA、hibernate-annotations-3.4.0.GA、slf4j-1.5.8、ojdbc14.jar

2.eclipse新建Java project ,取名hibernatePro,项目下创建一个lib文件夹。将

hibernate-distribution-3.3.2.GA中hibernate3.jar

hibernate-distribution-3.3.2.GA\lib\required中antlr-2.7.6.jar、commons-collections-3.1.jar、dom4j-1.6.1.jar、javassist-3.9.0.GA.jar、jta-1.1.jar、slf4j-api-1.5.8.jar

hibernate-annotations-3.4.0.GA中的hibernate-annotations.jar

hibernate-annotations-3.4.0.GA\lib中的ejb3-persistence.jar、hibernate-commons-annotations.jar

slf4j-1.5.8中的slf4j-nop-1.5.8.jar

ojdbc14.jar

加入此文件夹中，然后将所有jar包加入构建路径

3.在src目录下创建一个hibernate.cfg.xml文件，内容为：

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property>
<property name="connection.username">cat</property>
<property name="connection.password">cat</property>

<property name="connection.pool_size">1</property>

<property name="dialect">org.hibernate.dialect.OracleDialect</property>

<property name="current_session_context_class">thread</property>

<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

<property name="show_sql">true</property>

<property name="hbm2ddl.auto">update</property>

</session-factory>
</hibernate-configuration>

4.创建一个实体类

package com.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

@Entity
@Table(name="worker")
public class Worker {
private int id;
private String name;
private int age;

@SequenceGenerator(name="sequenceGenerator",sequenceName="worker_sequence",allocationSize=1)
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="sequenceGenerator")
@Id
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}

}

注意：

(1).上面的import都是javax.persistence下的

(2).类上加@Entity 声明实体，@Table(name=”worker”)对应的数据库表

(3).主键的get方法上加@Id 声明主键，@SequenceGenerator、@GeneratedValue是oracle自动生成sequence主键

5.在hibernate.cfg.xml的

<session-factory>

里加入

<mapping class="com.model.Worker"/>

此时的hibernate.cfg.xml为：

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property>
<property name="connection.username">cat</property>
<property name="connection.password">cat</property>

<property name="connection.pool_size">1</property>

<property name="dialect">org.hibernate.dialect.OracleDialect</property>

<property name="current_session_context_class">thread</property>

<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

<property name="show_sql">true</property>

<property name="hbm2ddl.auto">update</pr
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operty>

<mapping class="com.model.Worker"/>
</session-factory>
</hibernate-configuration>

6.创建一个实体的dao

package com.dao;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

import com.model.Worker;

public class WorkerDao {

public void addWorker(Worker w){
SessionFactory  sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
Session session = sessionFactory.getCurrentSession();
session.beginTransaction();
session.save(w);
session.getTransaction().commit();
}

}

7.创建一个测试类

package com.test;

import com.dao.WorkerDao;
import com.model.Worker;

public class WorkerTest {

public static void main(String[] args){
Worker w = new Worker();
w.setName("tom");
w.setAge(18);
WorkerDao ws = new WorkerDao();
ws.addWorker(w);
}

}

8.运行测试类即可。

之所以不用建表是因为hibernate.cfg.xml中的

<property name="hbm2ddl.auto">update</property>

属性

源码及jar包的下载地址：http://download.csdn.net/detail/qwcs163/9112977