【Spring学习】之 C3P0连接池

（1）导包

（2）目录结构

（3）applicationContext.xml

<?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" xsi:schemaLocation="        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">    <!-- 配置c3p0连接池 -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">        <!-- 注入属性值 -->        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>        <property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/test"></property>        <property name="user" value="root"></property>        <property name="password" value="admin"></property>    </bean>    <bean id="userService" class="cn.yyf.c3p0.UserService">        <!-- 注入dao对象 -->        <property name="userDao" ref="userDao"></property>    </bean>    <bean id="userDao" class="cn.yyf.c3p0.UserDao">        <!-- 注入jdbcTemplate对象 -->        <property name="jdbcTemplate" ref="jdbcTemplate"></property>    </bean>    <!-- 创建jdbcTemplate对象 -->    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">        <!-- 把dataSource传递到模板对象里面 -->        <property name="dataSource" ref="dataSource"></property>    </bean>    <!-- 开启 aop 注解的自动代理: -->    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>    <!-- 1  配置对象 -->    <bean id="book" class="cn.yyf.aop.Book"></bean>    <bean id="myBook" class="cn.yyf.aop.MyBook"></bean></beans>

（4）UserDao.java

（5）UserService.java

测试类