spring_事务管理 TransactionManager

1.spring中的TransactionManager接口

DateSourceTransactionManager 用于JDBC的事务管理

HibernateTransactionManager用于Hibernate的事务管理

JpaTransactionManager 用于Jpa的事物管理

2.spring中TransactionManager接口的定义（源码）

事务的属性介绍：这里定义了传播行为、隔离级别、超时时间、是否只读

3.转账案例

（1）项目结构

（2）导入jar

（3）建立数据库测试数据

CREATE DATABASE springjdbc
USE springjdbc
CREATE TABLE `ar_account` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) DEFAULT NULL,
  `money` double(255,0) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of ar_account
-- ----------------------------
INSERT INTO `ar_account` VALUES ('1', '张三', '60');
INSERT INTO `ar_account` VALUES ('2', '李四', '40');

（4）建立日志配置（log4j.properties）

# Global logging configuration
log4j.rootLogger=info, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

（5）建立数据库配置（db.properties）

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springjdbc
jdbc.username=root
jdbc.password=root

（6）建立接口 AccountDao类与实现AccountDaoImpl类

package com.linxin.spring.dao;

public interface AccountDao {
	//加钱
	void addMoney(Integer id,Double money);
	//减钱
	void subMoney(Integer id,Double money);

}

package com.linxin.spring.dao;

import javax.annotation.Resource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

@Repository("accountDao")
public class AccountDaoImpl implements AccountDao {
	@Resource(name="jdbctemplate")
	private JdbcTemplate jt;
	
	@Override
	public void addMoney(Integer id, Double money) {
		String sql= "update ar_account set money = money + ? where id= ?";
		jt.update(sql,money,id);
	}

	@Override
	public void subMoney(Integer id, Double money) {
		String sql= "update ar_account set money = money - ? where id= ?";
		jt.update(sql,money,id);

	}

}

（7）创建AccountService接口类与实现类AccountServiceImpl

package com.linxin.spring.service;

public interface AccountService {
	void transfer(Integer from, Integer to,Double money);
}

package com.linxin.spring.service;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.linxin.spring.dao.AccountDao;

@Service("accountService")
public class AccountServiceImpl implements AccountService {
	@Resource(name="accountDao")
	private AccountDao accountDao;
	@Override
	public void transfer(Integer from, Integer to, Double money) {
		accountDao.addMoney(to, money);
		int a=1/0;
		accountDao.subMoney(from, money);
	}

}

（8）创建spring配置文件application.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"
       xmlns:centext="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
		http://www.springframework.org/schema/context
		http://www.springframework.org/schema/context/spring-context-4.2.xsd
		http://www.springframework.org/schema/aop
		http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
		http://www.springframework.org/schema/tx
		http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">
		<!-- 加入扫描 -->
		<centext:component-scan base-package="com.linxin.spring.dao"></centext:component-scan>
		<centext:component-scan base-package="com.linxin.spring.service"></centext:component-scan>
		<!-- 加载文件 -->
		<centext:property-placeholder location="classpath:db.properties"/>
		
		<!-- spring管理c3p0数据源 -->
		<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
			<property name="driverClass" value="${jdbc.driver}"></property>
			<property name="jdbcUrl" value="${jdbc.url}"></property>
			<property name="user" value="${jdbc.username}"></property>
			<property name="password" value="${jdbc.password}"></property>
		</bean>
		<!-- Jdbctemplate -->
		<bean name="jdbctemplate" class="org.springframework.jdbc.core.JdbcTemplate">
			<property name="dataSource" ref="dataSource"></property>
		</bean>
		<!-- 事务管理 -->
		<bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
			<!-- 数据源 -->
			<property name="dataSource" ref="dataSource"></property>
		</bean>
		<!-- 通知 -->
		<tx:advice id="txAdvice" transaction-manager="transactionManager">
			<tx:attributes>
				<!-- 传播行为 -->
				<!-- 支持当前事务，如果不存在，就新建一个 -->
				<tx:method name="transfer" propagation="REQUIRED"/>

			</tx:attributes>
		</tx:advice>
		<!-- 切面（将通知织入切入点） -->
		<aop:config>
			<!-- 切入点 -->
			<aop:pointcut expression="execution(* com.linxin.spring.service..*.*(..))" id="txPointcut"/>
			<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
		</aop:config>
</beans>

（9）测试类

package com.linxin.spring.Testtx;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.linxin.spring.service.AccountService;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class TestTx {
	@Resource(name="accountService")
	private AccountService accountService;
	@Test
	public void testTransfer() {
		accountService.transfer(2, 1, 30.0);
	}

}

spring_事务管理 TransactionManager

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