spring声明式事物管理配置和对c3p0连接池的详细配置

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直接上配置代码：
<?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.xsd      http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop.xsd         http://www.springframework.org/schema/tx      http://www.springframework.org/schema/tx/spring-tx.xsd">        <!-- 1. 数据源对象: C3P0连接池 --><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">   <property name="driverClass" value="com.mysql.jdbc.Driver"></property>   <property name="jdbcUrl" value="jdbc:mysql:///hib-demo"></property>   <property name="user" value="root"></property>   <property name="password" value="123456"></property>   <property name="initialPoolSize" value="3"></property>   <property name="maxPoolSize" value="10"></property>   <property name="maxStatements" value="100"></property>   <property name="acquireIncrement" value="2"></property></bean><!-- 2. 创建JdbcTemplate对象 --><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">    <property name="dataSource" ref="dataSource"></property></bean><!-- 3. dao实例 --><bean id="deptDao" class="cn.itcast.a_tx.DeptDao">    <property name="jdbcTemplate" ref="jdbcTemplate"></property></bean><!-- 4. service实例 --><bean id="deptService" class="cn.itcast.a_tx.DeptService">    <property name="deptDao" ref="deptDao"></property></bean><!-- #############5. Spring声明式事务管理配置############### --><!-- 5.1 配置事务管理器类 --><bean id="txManager" class="org.springframework.jdbc.DataSourceTransactionManager">   <property name="dataSource" ref="dataSource"></property></bean><!-- 5.2 配置事务增强(如果管理事务?) --><tx:advice id="txAdvice" transaction-manager="txManager">   <tx:attributes>       <tx:method name="*" read-only="false"/>   </tx:attributes></tx:advice><!-- 5.3 Aop配置： 拦截哪些方法(切入点表表达式) + 应用上面的事务增强配置 --><aop:config>   <aop:pointcut expression="execution(* cn.itcast.a_tx.DeptService.save(..))" id="pt"/>   <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/></aop:config></beans>
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