Spring的事务管理:基于注解的事务管理

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基于注解的事务管理:

第一步:事务管理器:

<!-- 事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>

第二步:注解事务:

<!-- 开启注解的事务管理 -->
<tx:annotation-driven transaction-manager="transactionManager"/>

注解事务-完整版配置文件

<?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"
	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.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context.xsd
	http://www.springframework.org/schema/aop
	http://www.springframework.org/schema/aop/spring-aop.xsd
	http://www.springframework.org/schema/tx 
	http://www.springframework.org/schema/tx/spring-tx.xsd">
	
	<!-- 引入外部属性文件. -->
	<context:property-placeholder location="classpath:jdbc.properties"/>
	
	<!-- 配置c3p0连接池 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="driverClass" value="${jdbc.driver}"/>
		<property name="jdbcUrl" value="${jdbc.url}"/>
		<property name="user" value="${jdbc.user}"/>
		<property name="password" value="${jdbc.password}"/>
	</bean>
	
	<!-- 业务层类 -->
	<bean id="accountService" class="cn.itcast.spring3.demo4.AccountServiceImpl">
		<!-- 在业务层注入Dao -->
		<property name="accountDao" ref="accountDao"/>
	</bean>
	
	<!-- 持久层类 -->
	<bean id="accountDao" class="cn.itcast.spring3.demo4.AccountDaoImpl">
		<!-- 注入连接池的对象,通过连接池对象创建模板. -->
		<property name="dataSource" ref="dataSource"/>
	</bean>
	
	<!-- 事务管理器 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"/>
	</bean>
	
	<!-- 开启注解的事务管理 -->
	<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

第三步:在Service上使用注解

@Transactional

* 注解中有属性值:

* isolation

* propagation

* readOnly

...

package cn.itcast.spring3.demo4;

import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

@Transactional(isolation=Isolation.DEFAULT,propagation=Propagation.REQUIRED,readOnly=false)
public class AccountServiceImpl implements AccountService {
	private AccountDao accountDao;

	public void setAccountDao(AccountDao accountDao) {
		this.accountDao = accountDao;
	}

	/**
	 * 转账的方法
	 * 
	 * @param from
	 *            :从哪转出
	 * @param to
	 *            :转入的人
	 * @param money
	 *            :转账金额
	 */
	public void transfer(final String from, final String to, final Double money) {
		accountDao.out(from, money);
		//int d = 1 / 0;
		accountDao.in(to, money);
	}
}