这里指的是配置文件applicationContext.xml中的配置方式。

第一种格式

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-3.1.xsd
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
    
    <!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 -->
    <context:component-scan base-package="com.wxplatform.dao"/>
    <context:component-scan base-package="com.wxplatform.service"/>
    
    <!-- 配置数据源 -->
	<!-- 使用XML Schema的p名称空间配置     -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
	   p:driverClass="com.mysql.jdbc.Driver"
	   p:jdbcUrl="jdbc:mysql://localhost:3306/weixindb"
	   p:user="root"
	   p:password="root" >
	</bean>

	<!-- 配置Jdbc模板 -->
	<bean name="jdbcTemplate" id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"
		p:dataSource-ref="dataSource" />  

        <!-- 配置事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
		p:dataSource-ref="dataSource" />
		
	<!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 -->
	<aop:config proxy-target-class="true">
		<aop:pointcut id="serviceMethod"
			expression=" execution(* com.wxadplatform.service..*(..))" />
		<aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
	</aop:config>
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="*" />
		</tx:attributes>
	</tx:advice>
</beans>

第二种格式：

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-3.1.xsd
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
    
    <!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 -->
    <context:component-scan base-package="com.wxplatform.dao"/>
    <context:component-scan base-package="com.wxplatform.service"/>
		
   <!-- C3P0 -->
    <bean id="dataSource"  
        class="com.mchange.v2.c3p0.ComboPooledDataSource" 
        destroy-method="close">        
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/weixindb"/>
        
        <property name="user" value="root"></property>  
        <property name="password" value="root"></property>
         
        <property name="maxPoolSize" value="5"></property>  
        <property name="minPoolSize" value="1"></property>  
        <property name="initialPoolSize" value="5"></property>  
        <property name="acquireIncrement" value="5"></property>  
        <property name="maxIdleTime" value="20"></property>  
    </bean>


    <!-- 配置Jdbc模板 -->

    <bean id="jdbcTemplate"   class="org.springframework.jdbc.core.JdbcTemplate">
          <property name="dataSource" ref="dataSource" />
    </bean>
		
		
		
	<!-- 配置事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
		p:dataSource-ref="dataSource" />
		
	<!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 -->
	<aop:config proxy-target-class="true">
		<aop:pointcut id="serviceMethod"
			expression=" execution(* com.wxadplatform.service..*(..))" />
		<aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
	</aop:config>
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<tx:method name="*" />
		</tx:attributes>
	</tx:advice>
</beans>