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();
}
}