<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

注入值 基本信息(必须要有的)

<property name="user" value="root"></property>

<property name="password" value="1234"></property>

<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test"></property>

<property name="driverClass" value="com.mysql.jdbc.Driver"></property>

<property name="initialPoolSize" value="5"></property>

<property name="maxPoolSize" value="10"></property>

</bean> 

<context:property-placeholder location="classpath:db.properties"/>

jdbc.password=1234

jdbc.url=jdbc:mysql://localhost:3306/test

jdbc.driver=com.mysql.jdbc.Driver

jdbc.initPoolSize=5

jdbc.maxPoolSize=10

<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="jdbcUrl" value="${jdbc.url}"></property>

<property name="driverClass" value="${jdbc.driver}"></property>

<property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>

<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>

</bean>

<!-- <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> -->

<!-- <property name="user" value="USER_RZCLOUD"></property> -->

<!-- <property name="password" value="Richway1"></property> -->

<!-- <property name="jdbcUrl" value="jdbc:oracle:thin:@localhost/orcl"></property> -->

<!-- <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"></property> -->

<!-- <property name="initialPoolSize" value="5"></property> -->

<!-- <property name="maxPoolSize" value="10"></property> -->

<!-- </bean> -->

<context:property-placeholder location="classpath:db.properties" />

jdbc.user = USER_RZCLOUD

jdbc.password = Richway1

jdbc.url = jdbc:oracle:thin:@localhost/orcl

jdbc.driver = oracle.jdbc.driver.OracleDriver

jdbc.initPoolSize=5

jdbc.maxPoolSize=10

-->

<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="jdbcUrl" value="${jdbc.url}"></property>

<property name="driverClass" value="${jdbc.driver}"></property>

<property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>

<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>

</bean>