<?xml version="1.0" encoding="UTF-8"?>
<!-- 引入beans的头 -->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!-- 配置Spring默认的连接池 -->
    <!-- 这个类由Spring来帮我们创建,它默认情况下只创建一次,因为是单例的. -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql:///spring3_day02"></property>
        <property name="username" value="root"></property>
        <property name="password" value=""></property>
        
    </bean>
    <!-- 配置DBCP连接池 -->
    <bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql:///spring3_day02"></property>
        <property name="username" value="root"></property>
        <property name="password" value=""></property>
        
    </bean>
    
    <!-- 配置C3P0连接池 -->
    <bean id="dataSource2" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///spring3_day02"></property>
        <property name="user" value="root"></property>
        <property name="password" value=""></property>
    
    </bean>
    <!-- 定义jdbctemplate -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
          <property name="dataSource" ref="dataSource2"></property><!-- 把上面定义好的连接池注入进来了 -->
    </bean>
</beans>