Spring事务管理之声明式事务管理：基于TransactionProxyFactoryBean的方式

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案例

　　- 利用Spring的声明式事务（TransactionProxyFactoryBean）管理模拟转账过程

数据库准备

-- 创建表
CREATE TABLE `account`(
	`id` INT NOT NULL AUTO_INCREMENT,
	`name` VARCHAR(100)	NOT NULL,
	`money` DOUBLE DEFAULT 0,
	PRIMARY KEY (`id`)
)ENGINE = INNODB DEFAULT CHARSET = UTF8;
-- 初始化数据
INSERT INTO account (name, money) VALUES ('张三', 1000);
INSERT INTO account (name, money) VALUES ('李四', 1000);
INSERT INTO account (name, money) VALUES ('王五', 1000);

实例

1.项目结构

2.pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
  	<modelVersion>4.0.0</modelVersion>
  
	<groupId>org.hibernate</groupId>
	<artifactId>SpringTransaction-Proxy</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>SpringTransaction-Proxy Maven Webapp</name>
	<url>http://maven.apache.org</url>
	
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<spring.version>4.3.8.RELEASE</spring.version>
	</properties>
	
	<dependencies>
		<!-- junit -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>
		<!-- spring core -->
		<dependency>
		    <groupId>org.springframework</groupId>
		    <artifactId>spring-core</artifactId>
		    <version>${spring.version}</version>
		</dependency>
		<dependency>
		    <groupId>org.springframework</groupId>
		    <artifactId>spring-beans</artifactId>
		    <version>${spring.version}</version>
		</dependency>
		<dependency>
		    <groupId>org.springframework</groupId>
		    <artifactId>spring-context</artifactId>
		    <version>${spring.version}</version>
		</dependency>
		<!-- spring dao -->
		<dependency>
		    <groupId>org.springframework</groupId>
		    <artifactId>spring-jdbc</artifactId>
		    <version>${spring.version}</version>
		</dependency>
		<!-- spring test -->
		<dependency>
		    <groupId>org.springframework</groupId>
		    <artifactId>spring-test</artifactId>
		    <version>${spring.version}</version>
		</dependency>
		<!-- MySQL -->
		<dependency>
		    <groupId>mysql</groupId>
		    <artifactId>mysql-connector-java</artifactId>
		    <version>5.1.42</version>
		</dependency>
		<!-- C3P0 -->
		<dependency>
		    <groupId>com.mchange</groupId>
		    <artifactId>c3p0</artifactId>
		    <version>0.9.5.2</version>
		</dependency>
	</dependencies>
  
	<build>
		<finalName>SpringTransaction-Proxy</finalName>
	</build>
	
</project>

3.AccountDao.java

package org.spring.dao;

/**
 * 转账操作DAO层接口
 *
 */
public interface AccountDao {

	/**
	 * 转出
	 * 
	 * @param out
	 * 				转出账户
	 * @param money
	 * 				转出金额
	 */
	void outMoney(String out, double money);
	
	/**
	 * 转入
	 * 
	 * @param in
	 * 				转入账户
	 * @param money
	 * 				转入金额
	 */
	void inMoney(String in, double money);
	
}

4.AccountDaoImpl.java

package org.spring.dao.impl;

import org.spring.dao.AccountDao;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

/**
 * 转账操作DAO层实现类
 *
 */
public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {

	/**
	 * 转出
	 */
	public void outMoney(String out, double money) {
		
		String sql = "update account set money = money - ? where name = ?";
		this.getJdbcTemplate().update(sql, money, out);

	}

	/**
	 * 转入
	 */
	public void inMoney(String in, double money) {

		String sql = "update account set money = money + ? where name = ?";
		this.getJdbcTemplate().update(sql, money, in);
		
	}

}

5.AccountService.java

package org.spring.service;

/**
 * 转账操作业务层接口
 *
 */
public interface AccountService {

	/**
	 * 转账
	 * 
	 * @param out
	 * 				转出账户
	 * @param in
	 * 				转入账户
	 * @param money
	 * 				转账金额
	 */
	void transfer(String out, String in, double money);
	
}

6.AccountServiceImpl.java

package org.spring.service.impl;

import org.spring.dao.AccountDao;
import org.spring.service.AccountService;

/**
 * 转账操作业务层实现类
 *
 */
public class AccountServiceImpl implements AccountService {

	private AccountDao accountDao;

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

	/**
	 * 转账
	 */
	public void transfer(String out, String in, double money) {
		
		accountDao.outMoney(out, money);
		accountDao.inMoney(in, money);
		
	}

}

7.jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.username=root
jdbc.password=***
jdbc.url=jdbc:mysql:///spring_transaction?useSSL=true&characterEncoding=UTF-8

8.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:context="http://www.springframework.org/schema/context"
    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">

	<!-- 引入外部的属性文件 -->
	<context:property-placeholder location="classpath:jdbc.properties"/>
	
	<!-- C3P0配置 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="driverClass" value="${jdbc.driver}"/>
		<property name="user" value="${jdbc.username}"/>
		<property name="password" value="${jdbc.password}"/>
		<property name="jdbcUrl" value="${jdbc.url}"/>
	</bean>
	
	<!-- 配置业务类 -->
	<bean id="accountService" class="org.spring.service.impl.AccountServiceImpl">
		<!-- 注入DAO -->
		<property name="accountDao" ref="accountDao"/>
	</bean>
	
	<!-- 配置DAO类 -->
	<bean id="accountDao" class="org.spring.dao.impl.AccountDaoImpl">
		<!-- 注入数据库连接池 -->
		<property name="dataSource" ref="dataSource"/>
	</bean>
	
	<!-- 配置事务管理器 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 注入数据库连接池 -->
		<property name="dataSource" ref="dataSource"/>	
	</bean>
	
	<!-- 配置事务代理 -->
	<bean id="accountServiceProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
		<!-- 注入事务管理器 -->
		<property name="transactionManager" ref="transactionManager"/>
		<!-- 注入目标代理类 -->
		<property name="target" ref="accountService"/>
		<!-- 注入事务属性 -->
		<property name="transactionAttributes">
			<props>
				<!-- prop参数：共五个
					1.PROPAGATION	:	事务的传播行为
					2.ISOLATION		:	事务的隔离级别
					3.READONLY		:	是否只读
					4.-Exception	:	发生哪些异常回滚事务
					5.+Exception	:	发生哪些异常不会滚事务
				 -->
				<prop key="transfer">PROPAGATION_REQUIRED</prop><!-- 需要事务管理的方法，及事务属性 -->
			</props>
		</property>
	</bean>

</beans>

9.TestProxyTransaction.java

package org.spring.test;

import javax.annotation.Resource;

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

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class TestProxyTransaction {
	
	// 注入经过事务代理的业务类
	@Resource(name="accountServiceProxy")
	private AccountService accountService;
	
	@Test
	public void testTransfer() {
		
		accountService.transfer("张三", "李四", 200d);
		
	}

}

10.效果预览

　　10.1 正常执行

　　10.2 非正常执行（修改AccountServiceImpl.java如下）

package org.spring.service.impl;

import org.spring.dao.AccountDao;
import org.spring.service.AccountService;

/**
 * 转账操作业务层实现类
 *
 */
public class AccountServiceImpl implements AccountService {

	private AccountDao accountDao;

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

	/**
	 * 转账
	 */
	public void transfer(String out, String in, double money) {
		
		accountDao.outMoney(out, money);
		int i = 1 / 0;//手动抛出异常
		accountDao.inMoney(in, money);
		
	}

}

　　结果如下：

参考：http://www.imooc.com/video/9332