Hibernate采用*.hbm.xml方式和注释(annotation)插入数据示例

从网上下载以下三个包

hibernate-annotations-3.4.0.GA.zip、(导入项目包hibernate-annotations.jar、ejb3-persistence.jar、hibernate-commons-annotations.jar)

hibernate-distribution-3.3.2.GA.zip(导入项目包hibernate3.jar、javassist-3.9.0.GA.jar、jta-1.1.jar、slf4j-api-1.5.8.jar、commons-collections-3.1.jar、dom4j-1.6.1.jar、antlr-2.7.6.jar)、

slf4j.zip(slf4j-nop-1.5.8.jar、slf4j-api-1.5.8.jar)

把项目所需要的包添加至项目,此就略了。

首先在DB创建Student、Teacher表。

Student实体类

public class Student {

public int id;

public String name;

public int age;

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;

}

}

//////////采用注释方式的实体类

/**

* javax.persistence是一个标准,hibernate只是一个它的实现

*/

import javax.persistence.Entity;

import javax.persistence.Id;

/**

* @Entity表示和DB的table是一样的

* @author tfq

*

*/

@Entity

public class Teacher {

public int id;

public String name;

public String title;

/**

* @Id表示主键

* @return

*/

@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 String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

}

////////Student.hbm.xml配置文件

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC

"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="tfq.model">

<class name="Student" table="student">

<id name="id"></id>

<property name="name"></property>

<property name="age"></property>

</class>

</hibernate-mapping>

./////////////////Hibernate.cfg.xml

<?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>

<!-- Database connection settings -->

<property name="connection.driver_class">com.mysql.jdbc.Driver</property>

<property name="connection.url">jdbc:mysql://localhost/hibernate</property>

<property name="connection.username">root</property>

<property name="connection.password">123456</property>

<!-- JDBC connection pool (use the built-in) -->

<!--

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

-->

<!-- SQL dialect -->

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

<!-- Enable Hibernate's automatic session context management -->

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

<!-- Disable the second-level cache -->

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

<!-- Echo all executed SQL to stdout -->

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

<!-- Drop and re-create the database schema on startup -->

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

<!-- Student是采用的*.hmb.xml方式插入DB -->

<mapping resource="tfq/model/Student.hbm.xml"/>

<!-- Teacher是采用的注释方式插入DB的关键之处 -->

<mapping class="tfq.model.Teacher"/>

</session-factory>

</hibernate-configuration>

/////测试类

public class TestStudent {

public static void main(String[] args) {

Teacher s=new Teacher();

s.setTitle("title");

s.setId(1);

s.setName("tfq");

//采用*.hbm.xml方式实例化读取配置文件对象

//Configuration config=new Configuration();

//采用注释方式生成Configuration对象

Configuration config=new AnnotationConfiguration();

//调取hibernate.cfg.xml配置文件并创建一个sessionFactory

SessionFactory sf=config.configure().buildSessionFactory();

//创建一个Session

Session session=sf.openSession();

session.beginTransaction();

session.save(s);

session.beginTransaction().commit();

session.close();

sf.close();

}

}