Spring3与hibernate4注解式声明事务管理

IDEA 开发交流群：185441009

注解式声明事务管理，指的是在java源码中利用注解的方式指定事务管理的方法。

applicationContext-common.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	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-3.1.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.1.xsd
	http://www.springframework.org/schema/tx
	http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
	http://www.springframework.org/schema/aop
	http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
	<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location" value="/WEB-INF/server.properties"></property>
	</bean>
	<!-- data source -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass"><value>${jdbc.driverClassName}</value></property>
		<property name="jdbcUrl"><value>${jdbc.url}</value></property>
		<property name="user"><value>${jdbc.username}</value></property>
		<property name="password"><value>${jdbc.password}</value></property>
		<property name="minPoolSize"><value>10</value></property>
		<property name="maxPoolSize"><value>20</value></property>
		<property name="maxIdleTime"><value>600</value></property>
		<property name="acquireIncrement"><value>2</value></property>
		<property name="maxStatements"><value>0</value></property>
		<property name="maxStatementsPerConnection"><value>20</value></property>
		<property name="initialPoolSize"><value>20</value></property>
		<property name="idleConnectionTestPeriod"><value>600</value></property>
		<property name="acquireRetryAttempts"><value>30</value></property>
		<property name="breakAfterAcquireFailure"><value>false</value></property>
		<property name="testConnectionOnCheckout"><value>false</value></property>
	</bean>
	<!-- session factory -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="packagesToScan" value="com.ipt.model" />
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.format_sql">false</prop>
				<prop key="hibernate.use_sql_comments">false</prop>
				<prop key="hibernate.cache.use_second_level_cache">false</prop>
			</props>
		</property>
	</bean>
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate4.HibernateTransactionManager">
		<property name="sessionFactory" ref="sessionFactory" />
	</bean>
	<!--启动注解用注解来管理事务-->
	<tx:annotation-driven transaction-manager="transactionManager"/>  
</beans>

service代码中增加注解

package com.ipt.service.impl;

import java.util.List;

import org.springframework.transaction.annotation.Transactional;

import com.ipt.dao.IPersonDao;
import com.ipt.model.Person;
import com.ipt.service.PersonService;

@Transactional
public class PersonServiceImpl implements PersonService {
	private IPersonDao personDao;

	@Override
	@Transactional(rollbackFor={Exception.class})
	public void addPerson() {
		Person u1 = new Person();
		u1.setName("Ying Ma");
		u1.setAge(24);
		personDao.save(u1);

		Person u2 = new Person();
		u2.setName("Wei Jun");
		u2.setAge(20);
		personDao.save(u2);
	}

	@Override
	@Transactional(readOnly=true)
	public List<Person> getPersons() {
		List<Person> persons = personDao.query("from Person",
				new Object[] {});
		return persons;
	}

	public IPersonDao getPersonDao() {
		return personDao;
	}

	public void setPersonDao(IPersonDao personDao) {
		this.personDao = personDao;
	}
}

@Transactional   默认propagation=Propagation.REQUIRED，所以可以省略。

@Transactional(readOnly=true)

 readOnly=true表明所注解的方法或类只是读取数据。

 readOnly=false表明所注解的方法或类是增删改数据。