Spring Mvc那点事---(33)Spring事务基于AOP实现

   Spring的事务也可以通过AOP来实现，可以借助AOP实现切面事务功能，需要使用TransactionProxyFactoryBean代理类。TransactionProxyFactoryBean代理通过切面增强来对被代理的目标对象中的方法进行事务控制。下面我们通过一个示例来演示下用法。

代理类org.springframework.transaction.interceptor.TransactionProxyFactoryBean

创建表：

CREATE TABLE `useraccount` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(50) DEFAULT NULL,
`money` double DEFAULT '0',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8

引入JAR包

<dependencies>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>

<!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5</version>
</dependency>

<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.36</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.2.2.RELEASE</version>
</dependency>

<!-- https://mvnrepository.com/artifact/javax.annotation/javax.annotation-api -->
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.2</version>
</dependency>

<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>

</dependencies>

持久层

package com.trans.trans02;

public interface IUserAccountDao {

//转出账户
public void TransferOut(String user,double money);

//转入账户
public void TransferIn(String user,double money);

}

package com.trans.trans02;

import org.springframework.jdbc.core.support.JdbcDaoSupport;

public class UserAccountDao extends JdbcDaoSupport implements IUserAccountDao {

public void TransferOut(String user, double money) {
// TODO Auto-generated method stub
String sql="UPDATE `useraccount` SET money=money-? WHERE username=?";
this.getJdbcTemplate().update(sql, money,user);
}

public void TransferIn(String user, double money) {
// TODO Auto-generated method stub
String sql="UPDATE `useraccount` SET money=money+? WHERE username=?";
this.getJdbcTemplate().update(sql, money,user);

}

}

业务层

package com.trans.trans02;

public interface IUserAccoutService {

//fromAccount来源账户  toAccount目标账户，money金额
public void UserTransferMoney(String fromAccount,String toAccount,double money);
}

package com.trans.trans02;

import javax.annotation.Resource;

import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.springframework.transaction.support.TransactionTemplate;

public class UserAccoutService implements IUserAccoutService {

@Resource(name="userAccountDao")
private IUserAccountDao userAccountDao;

public void UserTransferMoney(String fromAccount,String toAccount,
double money) {
//  org.springframework.transaction.TransactionDefinition.ISOLATION_REPEATABLE_READ
userAccountDao.TransferOut(fromAccount, money);//转出账户
int m=5/0; //出现异常
userAccountDao.TransferIn(toAccount, money);//转入账户

}

}

配置bean

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"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"
xmlns:cache="http://www.springframework.org/schema/cache" xmlns:repo="http://www.springframework.org/schema/data/repository"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd http://www.springframework.org/schema/data/repository http://www.springframework.org/schema/data/repository/spring-repository-1.7.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd "
default-lazy-init="true">

<description>Spring配置</description>
<context:annotation-config />
<!-- 引入数据源配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>

<!-- 连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driverClass}"></property>
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="user" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>

<!-- 持久层 -->
<bean id="userAccountDao" class="com.trans.trans02.UserAccountDao">
<property name="dataSource" ref="dataSource"></property>
</bean>

<bean id="userAccoutService" class="com.trans.trans02.UserAccoutService">
</bean>

<!-- 配置事务管理其 -->

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 注入数据连接池 -->
<property name="dataSource" ref="dataSource"></property>
</bean>

<!-- aop代理 -->
<bean id="userAccountServiceProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<!-- 设置被代理对象 -->
<property name="target" ref="userAccoutService"></property>
<!-- 设置事务管理其 -->
<property name="transactionManager" ref="transactionManager"></property>
<!-- 设置事务属性 -->
<property name="transactionAttributes">
<props>
<!-- 设置拦截方法，可以使用通配符 -->
<!-- 可以设置事务的传播行为，隔离级别，多个值用逗号隔开 -->
<prop key="UserTransferMoney">PROPAGATION_REQUIRED,ISOLATION_REPEATABLE_READ</prop>
</props>
</property>
</bean>
</beans>

jdbc.properties

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/erp?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456

运行

package com.trans.trans02;

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

/**
* Hello world!
*
*/
public class App
{
public static void main( String[] args )
{

ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");

//获取代理类
IUserAccoutService service=(IUserAccoutService)context.getBean("userAccountServiceProxy");
service.UserTransferMoney("001", "002", 100);
}
}

demo下载http://download.csdn.net/detail/zx13525079024/9590746