Dao層系列-3-Hibernate Spring Intergration

根據Dao層系列第一篇 http://my.oschina.net/yaolifei/blog/145161 改寫，加入spring
首先看spring的配置文件：
applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
	http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.2.xsd">
 
	<context:property-placeholder location="jdbc.properties" />
	
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> 
		<property name="driverClassName" value="${jdbc.driverClassName}"/> 
		<property name="url" value="${jdbc.url}" /> 
		<property name="username" value= "${jdbc.username}" /> 
		<property name="password" value="${jdbc.password}" /> 
		<property name="maxActive" value="${jdbc.maxActive}" /> 
		<property name="validationQuery" value="${jdbc.validationQuery}" /> 
	</bean> 
	
	<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource"/>
		<property name="mappingResources">
			<list>
				<value>user.hbm.xml</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
				<prop key="hibernate.current_session_context_class">thread</prop>
				<prop key="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</prop>
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.hbm2ddl.auto">update</prop>
			</props>
		</property>
	</bean>
	
	<bean id="userDao" class="com.yaolifei.test.user.dao.UserDaoImpl">
		<property name="sessionFactory" ref="sessionFactory"/>
	</bean>
	<bean id="userService" class="com.yaolifei.test.user.service.UserServiceImpl">
		<property name="userDao" ref="userDao"/>
	</bean>
</beans>

有改動的地方主要是使用了Hibernate的getCurrentSession()方法得到session，能夠來看下dao的實現：

UserDaoImpl.java

package com.yaolifei.test.user.dao;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;

import com.yaolifei.test.user.domain.User;

public class UserDaoImpl implements UserDao {
	private SessionFactory sessionFactory;

	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}

	@Override
	public User getById(Integer id) {
		Session session = sessionFactory.getCurrentSession();
		session.beginTransaction();
		User user = (User) session.get(User.class, id);
		session.getTransaction().commit();
		return user;
	}

	@Override
	public List<User> getAll() {
		Session session = sessionFactory.getCurrentSession();
		session.beginTransaction();
		Query query = session.createQuery("from User");
		List<User> list = query.list();
		session.getTransaction().commit();
		return list;
	}

	@Override
	public void save(User user) {
		Session session = sessionFactory.getCurrentSession();
		session.beginTransaction();
		session.save(user);
		session.getTransaction().commit();
	}

	@Override
	public void update(User user) {
		Session session = sessionFactory.getCurrentSession();
		session.beginTransaction();
		session.update(user);
		session.getTransaction().commit();
	}

	@Override
	public void remove(User user) {
		Session session = sessionFactory.getCurrentSession();
		session.beginTransaction();
		session.delete(user);
		session.getTransaction().commit();
	}

}

關於getCurrentSession和openSession的區別請參考：

http://javachikuang.iteye.com/blog/271879

本例完整代碼詳見：http://git.oschina.net/yaolifei/test/tree/master/test-hibernate-spring