HibernateDaoSupport的使用

一、HibernateDaoSupport概述

HibernateDaoSupport同样也是Spring提供的、为Hibernate访问数据库的DAO组件：该类主要提供如下两个方法，方便DAO的实现:

1、public final HiberanteTemplate getHibernateTemplate()

2、public final void setSessionFactory(SessionFactory sessionFactory)

其中setSessionFactory方法用来接收Spring的ApplicationContext的依赖注入，可接收配置在Spring的SessionFactory实例，getHibernateTemplate方法则用来生成HibernateTeplate模板对象来完成数据库访问。
同样常用HibernateDaoSupport中的getSession方法来获取Session对象对数据库进行操作，相对HibernateTemplate对象而言，HibernateDaoSupport应用更加灵活。

接下来，看看如何开发Spring整合Hibernate的程序（XML版本）

一、导入项目jar包

需要到的jar包括：

1）hibernate相关jar

2）SpringIOC和AOP相关jar

3）Spring-ORM整合jar

4）mysql驱动程序

二、准备数据库表和实体类

创建数据库：
create database spring;
use spring;
创建表：
create table account(
    id int primary key auto_increment,
    name varchar(40),
    money float
)character set utf8 collate utf8_general_ci;

package com.yiidian.domain;

import java.io.Serializable;
/**
 * @author http://www.yiidian.com
 * 
 */
public class Account implements Serializable{
	private Integer id;
	private String name;
	private Float money;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Float getMoney() {
		return money;
	}
	public void setMoney(Float money) {
		this.money = money;
	}
	@Override
	public String toString() {
		return "Account [id=" + id + ", name=" + name + ", money=" + money
				+ "]";
	}

	
}

三、编写Account类的Hibernate映射文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- 
	http://www.yiidian.com
 -->    
<hibernate-mapping>
	<class name="com.yiidian.domain.Account" table="account">
		<id name="id" column="id">
			<generator class="native"></generator>
		</id>
		<property name="name" column="name"></property>
		<property name="money" column="money"></property>
	</class>
</hibernate-mapping>

四、编写Dao接口和实现

AccountDao接口：

package com.yiidian.dao;

import java.util.List;

import com.yiidian.domain.Account;

/**
 * 
 * @author http://www.yiidian.com
 * 
 */
public interface AccountDao {

	public List<Account> findAll();
}

AccountDaoIpml：

package com.yiidian.dao.impl;

import java.util.List;

import org.springframework.orm.hibernate5.support.HibernateDaoSupport;

import com.yiidian.dao.AccountDao;
import com.yiidian.domain.Account;
/**
 * @author http://www.yiidian.com
 *
 */
public class AccountDaoImpl extends HibernateDaoSupport implements AccountDao {
	
	@Override
	public List<Account> findAll() {
		return this.getHibernateTemplate().loadAll(Account.class);
	}

}

五、配置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"
	xsi:schemaLocation="
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd">
        
     <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
     	<property name="location" value="classpath:jdbc.properties"/>
     </bean> 
     
     <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
     	<property name="driverClassName" value="${jdbc.driverClass}"/>
     	<property name="url" value="${jdbc.url}"/>
     	<property name="username" value="${jdbc.username}"/>
     	<property name="password" value="${jdbc.password}"/>
     </bean>
     
     <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
     	<property name="dataSource" ref="dataSource"></property>
     	<property name="hibernateProperties">
     		<props>
     			<prop key="hibernate.show_sql">true</prop>
     			<prop key="hibernate.format_sql">true</prop>
     			<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
     		</props>
     	</property>
     	<property name="mappingResources">
     		<list>
     			<value>com/yiidian/domain/Account.hbm.xml</value>
     		</list>
     	</property>
     </bean>  

     <bean id="accountDao" class="com.yiidian.dao.impl.AccountDaoImpl">
     	<property name="sessionFactory" ref="sessionFactory"/>
     </bean>
     
</beans>

六、编写测试类

package com.yiidian.test;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.yiidian.dao.AccountDao;
import com.yiidian.domain.Account;
/**
 * @author http://www.yiidian.com
 *
 */
public class HibernateTemplateDemo {
	public static void main(String[] args) {
		// 1.获取Spring容器
		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
		// 2.根据id获取bean对象
		AccountDao dao = (AccountDao)ac.getBean("accountDao");
		List<Account> list = dao.findAll();
		for (Account account : list) {
			System.out.println(account);
		}
	}
}

七、运行结果

 

源码下载：http://pan.baidu.com/s/1hrYPdKo