Spring_beans.xml

<context:component-scan base-package="com.proc"></context:component-scan>
<context:property-placeholder location="classpath:db.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="user" value="${jdbc.user}"></property>
    <property name="password" value="${jdbc.password}"></property>
    <property name="driverClass" value="${jdbc.driverClass}"></property>
    <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
</bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource"></property>
    <constructor-arg>
		<ref bean="u" />
	</constructor-arg>
</bean>

Spring_beans.xml

原文：https://www.cnblogs.com/junzifeng/p/12742531.html