spring基于注解的声明式事务

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

package com.service.impl;
import com.dao.IAccountDao;
import com.domain.Account;
import com.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
/**
 * 账户的业务层实现类
 *
 * 事务控制应该都是在业务层
 */
@Service("accountService")
@Transactional(readOnly=true,propagation= Propagation.SUPPORTS)
public class AccountServiceImpl implements IAccountService {
    @Autowired
    private IAccountDao accountDao;
    public void setAccountDao(IAccountDao accountDao) {
        this.accountDao = accountDao;
    }
    public Account findAccountById(Integer accountId) {
        return accountDao.findAccountById(accountId);
    }
    @Transactional(readOnly=false,propagation=Propagation.REQUIRED)
    public void transfer(String sourceName, String targetName, Float money) {
        System.out.println("transfer....");
            //2.1根据名称查询转出账户
            Account source = accountDao.findAccountByName(sourceName);
            //2.2根据名称查询转入账户
            Account target = accountDao.findAccountByName(targetName);
            //2.3转出账户减钱
            source.setMoney(source.getMoney()-money);
            //2.4转入账户加钱
            target.setMoney(target.getMoney()+money);
            //2.5更新转出账户
            accountDao.updateAccount(source);
            int i=1/0;
            //2.6更新转入账户
            accountDao.updateAccount(target);
    }
}

<!-- 开启 spring 对注解事务的支持 -->
<tx:annotation-driven transaction-manager="transactionManager"/>

<?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: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/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 配置spring创建容器时要扫描的包-->
    <context:component-scan base-package="com"></context:component-scan>
    <!-- 配置JdbcTemplate-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 配置数据源-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/eesy_spring"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
    </bean>
    <!-- spring中基于注解 的声明式事务控制配置步骤
        1、配置事务管理器
        2、开启spring对注解事务的支持
        3、在需要事务支持的地方使用@Transactional注解
     -->
    <!-- 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 开启spring对注解事务的支持-->
    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>
</beans>