1. 
2. <!-- 事务管理器 -->
3. <bean id="transactionManager"     
4. class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
5. <!-- 注入连接池 -->
6. <property name="dataSource" ref="dataSource"/>
7. </bean>

<!-- 配置生成代理对象 -->
<bean id="accountServiceProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<!-- 目标对象 -->
<property name="target" ref="accountService"/>
<!-- 注入事务管理器 -->
<property name="transactionManager" ref="transactionManager"/>
<!-- 事务的属性设置 -->
<property name="transactionAttributes">
<props>
<prop key="transfer">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>

<?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.demo2.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.demo2.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">
    <!-- 注入连接池 -->
    <property name="dataSource" ref="dataSource"/>
  </bean>
  <!-- 配置生成代理对象 -->
  <bean id="accountServiceProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
    <!-- 目标对象 -->
    <property name="target" ref="accountService"/>
    <!-- 注入事务管理器 -->
    <property name="transactionManager" ref="transactionManager"/>
    <!-- 事务的属性设置 -->
    <property name="transactionAttributes">[]
      <props>
        <!-- 
          prop格式：
            PROPAGATION,
            ISOLATION,
            readOnly,
            -Exception,
            +Exception
          * 顺序:
            传播行为、
            隔离级别、
            事务是否只读、
            发生哪些异常可以回滚事务（所有的异常都回滚）、
            发生了哪些异常不回滚.
         -->
        <prop key="transfer">PROPAGATION_REQUIRED</prop>
      </props>
    </property>
  </bean>
</beans>

package cn.itcast.spring3.demo2;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext2.xml")
public class SpringTest2 {
  @Autowired
  @Qualifier("accountServiceProxy")[]
  private AccountService accountService;
  @Test
  public void demo1(){
    accountService.transfer("aaa", "bbb", 100d);
  }
}