Spring中配合hibernate使用的简单例子

最近在看SPRING和hibernate,学习了spring和hibernate之间整合,下面举出一个例子予以说明.
 
    首先,可以注入的是sessionfactory,因为sessionfactory的Datasource可以用spring注入.比如一个下面的例子,是对对象进行增加的

接口IUserDAO:

public interface IUserDAO {
    public void insert(User user);
 }
User.java:
public class User {
      private String name;
 
       public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
}

UserDao.java:
(这里省去了import等东西了)
public class UserDAO implements IUserDAO {
    private SessionFactory sessionFactory; 
    
    public UserDAO() {
    }
    
    public UserDAO(SessionFactory sessionFactory) { 
        this.setSessionFactory(sessionFactory);
    }
    
//注入sessionFactory
    public void setSessionFactory(
                        SessionFactory sessionFactory) { 
        this.sessionFactory = sessionFactory; 
    } 
    
    public void insert(User user) {
       Session session = sessionFactory.openSession();
           Transaction tx= session.beginTransaction();
         session.save(user); 
         tx.commit();
        session.close(); 
    }

关键的base-config.xml:
<beans> 

//基本的datasource,存放实际连接串等东西
    <bean id="dataSource" 
          class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
        <property name="driverClassName"> 
            <value>com.mysql.jdbc.Driver</value> 
        </property> 
        <property name="url"> 
            <value>jdbc:mysql://localhost:3306/SpringHibernateDemo</value> 
        </property> 
        <property name="username"> 
            <value>root</value> 
        </property> 
        <property name="password"> 
            <value>123456</value> 
        </property>  
    </bean> 
    
<bean id="sessionFactory"  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" > 
        <property name="dataSource"> 
            <ref bean="dataSource"/> 
        </property> 
        <property name="mappingResources"> 
            <list> 
                <value>liaoo/springhibernatear/User.hbm.xml</value> 
            </list> 
        </property> 
        <property name="hibernateProperties"> 
            <props> 
                <prop key="hibernate.dialect"> 
                    org.hibernate.dialect.MySQLDialect
                </prop> 
            </props> 
        </property> 
    </bean>     <bean id="userDAO" class="liao.springhibernate.UserDAO"> 
        <property name="sessionFactory"> 
            <ref bean="sessionFactory"/> 
        </property> 
    </bean> 

可以看到,这里对userDAO类的sessionFactory进行了注入,而参考到其中的bean-config.xml里sessionFactory里实现.可以看到,可以将datasource注入到LocalSessionFactoryBean中.要注意的是org.springframework.orm.hibernate3.LocalSessionFactoryBean是hibernate 3整合使用的,org.springframework.orm.hibernate.LocalSessionFactoryBean是hibernate 2中使用的.

最后是测试程序
public static void main(String[] args) {
        ApplicationContext context = 
            new FileSystemXmlApplicationContext(
                    "beans-config.xml");
        
              IUserDAO userDAO =  (IUserDAO) context.getBean("userDAO");
               User user = new User();
            user.setName("jackyrong");
             userDAO.insert(user);