Original link:
http://www.cnblogs.com/bojuetech/p/4905821.html
<!-- 导入外部的资源文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置数据源 -->
<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>
<property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
</bean>
db.property content:
jdbc.user=root
jdbc.password=mysqladmin
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/test
jdbc.initPoolSize=5
jdbc.maxPoolSize=10
Before spring2.0 import external resource file, you must:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="Location" value="classpath:jdbc.property"></property>
</bean>
Reproduced in: https: //www.cnblogs.com/bojuetech/p/4905821.html