最简单的hibernate整合spring(1)

http://feichen00.blog.sohu.com/91380336.html

利用spring提供的HibernateDaoSupport类来简化Hibernate的事务操作：

实体类：

package com.entity;

public class Person {
	private Integer id;
	private String name;

	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;
	}

}

DAO接口类：

package com.dao;

import com.entity.Person;

public interface PersonDao {
	Person get(int id);
	void save(Person person);
	void update(Person person);
	void delete(Person person);
}

DAO接口实现类：

package com.impl;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.dao.PersonDao;
import com.entity.Person;

public class PersonDaoImpl extends HibernateDaoSupport implements PersonDao {

	@Override
	public Person get(int id) {
		return (Person)getHibernateTemplate().get(Person.class, new Integer(id));
	}

	@Override
	public void save(Person person) {
		getHibernateTemplate().save(person);
	}

	@Override
	public void update(Person person) {
		Person p = (Person)getHibernateTemplate().load(Person.class, new Integer(person.getId()));
		getHibernateTemplate().update(person);
	}

	@Override
	public void delete(Person person) {
		Person p = (Person)getHibernateTemplate().load(Person.class, new Integer(person.getId()));
		getHibernateTemplate().delete(p);
	}

}

spring配置文件applicationContext.xml：

<?xml version="1.0" encoding="gb2312"?>
<!-- Spring配置文件的DTD定义 -->
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<!-- Spring配置文件的根元素是beans -->
<beans>

	<!--定义数据源,该bean的ID为dataSource -->
	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<!-- 指定数据库驱动 -->
		<property name="driverClassName">
			<value>com.mysql.jdbc.Driver</value>
		</property>
		<!-- 指定连接数据库的URL -->
		<property name="url">
			<value>jdbc:mysql://localhost:3306/lee</value>
		</property>
		<!-- root为数据库的用户名 -->
		<property name="username">
			<value>root</value>
		</property>
		<!-- pass为数据库密码 -->
		<property name="password">
			<value>root</value>
		</property>
	</bean>


	<!--定义Hibernate的SessionFactory -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<!-- 依赖注入数据源，注入正是上文定义的dataSource -->
		<property name="dataSource">
			<ref local="dataSource" />
		</property>
		<!-- mappingResouces属性用来列出全部映射文件 -->
		<property name="mappingResources">
			<list>
			<!--以下用来列出所有的PO映射文件 -->
				<value>Person.hbm.xml</value>
			</list>
		</property>
		<!--定义Hibernate的SessionFactory的属性 -->
		<property name="hibernateProperties">
			<props>
				<!-- 指定Hibernate的连接方言 -->
			<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
				<!-- 不同数据库连接，启动时选择create,update,create-drop -->
				<prop key="hibernate.hbm2ddl.auto">update</prop>
			</props>
		</property>
	</bean>


	<!-- 配置Person持久化类的DAO bean -->
	<bean id="PersonDaoImpl" class="com.impl.PersonDaoImpl">
		<!-- 采用依赖注入来传入SessionFactory的引用 -->
		<property name="sessionFactory">
			<ref local="sessionFactory" />
		</property>
	</bean>

</beans>

Hibernate实体类映射文件Person.hbm.xml：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

	<class name="com.entity.Person" table="person">
		<!-- 配置主键信息 -->
		<id name="id" column="ID" type="integer">
			<generator class="identity"></generator>
		</id>
		
		<!-- 配置属性信息，默认type为string类型，所以不需要配置 -->
		<property name="name" column="NAME" not-null="true" type="string"></property>
	</class>

</hibernate-mapping>

测试类：(记得根据实际数据来编写测试数据)

package com.test;

import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.entity.Person;
import com.impl.PersonDaoImpl;

public class TestHibernate {

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {

	}

	@Test
	public void save() {
		 ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		   PersonDaoImpl personDaoImpl = (PersonDaoImpl)ctx.getBean("PersonDaoImpl");
		  System.out.println(personDaoImpl);
		  Person person = new Person();
		  person.setName("Tom");
		  personDaoImpl.save(person);
	}
	
	@Test
	public void get() {
		 ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		  PersonDaoImpl personDaoImpl = (PersonDaoImpl)ctx.getBean("PersonDaoImpl");
		  Person person = personDaoImpl.get(1);
		  System.out.println(person.getName());
	}
	
	@Test
	public void update() {
		 ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		  PersonDaoImpl personDaoImpl = (PersonDaoImpl)ctx.getBean("PersonDaoImpl");
		  System.out.println(personDaoImpl);
		  Person person = new Person();
		  person.setId(1);
		  person.setName("猫");
		  personDaoImpl.update(person);
	}
	
	@Test
	public void delete() {
		 ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		   PersonDaoImpl personDaoImpl = (PersonDaoImpl)ctx.getBean("PersonDaoImpl");
		  System.out.println(personDaoImpl);
		  Person person = new Person();
		  person.setId(2);
		  personDaoImpl.delete(person);
	}
	
}

其他的结构图，lib可以从附件获得。