spring 2.5.6和hibernate3.2.2集成（2）

上一篇文章写了如何使用spring的注解，这一篇记录一下和hibernate简单配合。

1.使用各种mysql客户端或直接命令行执行如下脚本：

create database if not exists `test`;

USE `test`;

DROP TABLE IF EXISTS `user`;

CREATE TABLE `user` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

 2.既然是ORM当然需要Model了

package com.isa.demo2.domain;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.apache.commons.lang.builder.ToStringBuilder;


@Entity
@Table(name = "user")
public class User implements Serializable {
	/**
	 * 
	 */
	private static final long serialVersionUID = -9029863029696113906L;
	private long id;
	private String name;
	
	@Id
	@Column(name = "ID", unique = true, nullable = false, scale = 0)
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	public long getId() {
		return id;
	}
	public void setId(long id) {
		this.id = id;
	}
	
	@Column(name = "NAME", unique = true, nullable = false)
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	@Override
	public String toString() {
		return ToStringBuilder.reflectionToString(this);
	}
	
}

 3.关于需不需要dao层的问题，看大家的习惯吧，作为一个demo，简单明了即可。这里使用了以前的一个项目的结构。

package com.isa.demo2.service;

import java.util.List;

import com.isa.demo2.domain.User;

public interface UserService {
	List<User> getAllUsers();
	User getUserById(long id);
}

 4.接口的实现类

package com.isa.demo2.service;

import java.util.List;

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

import com.isa.demo2.domain.User;

public class UserServiceImpl implements UserService {

	private SessionFactory sessionFactory;
		
	public SessionFactory getSessionFactory() {
		return sessionFactory;
	}

	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}
	
	@Override
	public List<User> getAllUsers() {
		Session session = sessionFactory.getCurrentSession();
		String hql = "from User";
		List<User> list = session.createQuery(hql).list();
		return list;
	}

	@Override
	public User getUserById(long id) {
		Session session = sessionFactory.getCurrentSession();
		User user = (User) session.get(User.class, id);
		return user;
	}

}

 5.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:aop="http://www.springframework.org/schema/aop"
	   xmlns:tx="http://www.springframework.org/schema/tx"
	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
	   default-autowire="byName" default-lazy-init="true">
	
	<!-- 支持 @Transactional 标记 -->
	<tx:annotation-driven/>

	<!-- 支持 @AspectJ 标记-->
	<aop:aspectj-autoproxy/>
	
	<aop:config>
		<aop:pointcut id="serviceOperation" expression="execution(* com.isa.demo2.service.*.*(..))"/>
		<aop:advisor advice-ref="txAdvice" pointcut-ref="serviceOperation"/>
	</aop:config>


	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="get*" read-only="true"/>
			<tx:method name="*"/>
		</tx:attributes>
	</tx:advice>

	<bean id="userService" class="com.isa.demo2.service.UserServiceImpl"></bean>

</beans>

 第二个配置文件applicationContext-hibernate.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans default-autowire="byName" default-lazy-init="true">
	
	<!-- 数据源定义,使用dbcp 连接池 -->
	<!-- 数据源配置,使用应用内的DBCP数据库连接池 -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<!-- Connection Info -->
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url" value="jdbc:mysql://localhost/test?useUnicode=true&amp;characterEncoding=utf-8" />
		<property name="username" value="root" />
		<property name="password" value="123456" />

		<!-- Connection Pooling Info -->
		<property name="initialSize" value="5" />
		<property name="maxActive" value="100" />
		<property name="maxIdle" value="30" />
		<property name="maxWait" value="1000" />
		<property name="poolPreparedStatements" value="false" />
		<property name="defaultAutoCommit" value="false" />
	</bean>

	<!--Hibernate SessionFatory-->
	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
		<property name="dataSource" ref="dataSource"/>
		<property name="annotatedClasses">
			<list>
				<value>com.isa.demo2.domain.User</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
				<prop key="hibernate.show_sql">false</prop>
				<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
				<prop key="hibernate.cache.use_query_cache">true</prop>
			</props>
		</property>
	</bean>

	<!--Hibernate TransactionManager-->
	<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory"/>
	</bean>
</beans>

 6.简单测试类

package com.isa.demo2.test;

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

import com.isa.demo2.service.UserService;

public class Demo2Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "demo2/*.xml" });
		UserService service = (UserService)context.getBean("userService");
		System.out.println(service.getUserById(1L).toString());
	}
}

 7.说明：这个demo来源于我刚毕业的时候做的一个项目，这是第一次接触spring和hibernate，那个项目的架构看起来蛮怪异，C#+hessian+hibernate+spring+Oracle，呵呵，为什么是C#呢？而且还是客户端程序，看到hessian就知道了。一些技术真的不用就忘记了，在这一段没有使用hibernate和spring的时间更新和添加了很多特性，现在重新看一下也算是与时俱进。再唠叨一下，技术和语言是永无止境的，但是学习的技巧和经验是需要归纳总结才能进步的。