mgfinal

//开启事务
this.demoDao.start();
//操作1
this.demoDao.ddlTx("com.mgfinal.vo.Demo.addDemo", p);
//操作2
this.demoDao.ddlTx("com.mgfinal.vo.Demo.addDemo", p);
//提交事务
this.demoDao.end();

<dataSource type="com.mgfinal.core.mybatis.ds.C3P0DataSourceFactory">
    <property name="driverClass" value="${driver}" />
    <property name="jdbcUrl" value="${url}" />
    <property name="user" value="${username}" />
    <property name="password" value="${password}" />
    <property name="idleConnectionTestPeriod" value="60" />
    <property name="maxPoolSize" value="20" />
    <property name="maxIdleTime" value="600" />
    <property name="preferredTestQuery" value="SELECT 1" />
</dataSource>

<!-- druid数据源 -->
<dataSource type="com.mgfinal.core.mybatis.ds.DruidDataSourceFactory">
	<!-- 基本属性 url、user、password -->  
	<property name="driver" value="${driver}" />
    <property name="url" value="${url}" />  
    <property name="username" value="${username}" />  
    <property name="password" value="${password}" />  
    <!-- 配置初始化大小、最小、最大 -->  
    <property name="initialSize" value="1" />  
    <property name="minIdle" value="1" />   
    <property name="maxActive" value="20" />  
    <!-- 配置获取连接等待超时的时间 -->  
    <property name="maxWait" value="60000" />  
    <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->  
    <property name="timeBetweenEvictionRunsMillis" value="60000" />  
    <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->  
    <property name="minEvictableIdleTimeMillis" value="300000" />  
    <property name="validationQuery" value="SELECT 'x'" />  
    <property name="testWhileIdle" value="true" />  
    <property name="testOnBorrow" value="false" />  
    <property name="testOnReturn" value="false" />  
    <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->  
    <property name="poolPreparedStatements" value="true" />  
    <property name="maxPoolPreparedStatementPerConnectionSize" value="20" />  
</dataSource>