spring 框架jdbc连接数据库

user=LF
password=LF
url=jdbc:oracle:thin:@localhost:1521:orcl
driver=oracle.jdbc.driver.OracleDriver

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

    <context:property-placeholder location="classpath:jdbc.properties"/>
    <bean id="connection" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="username" value="${user}"></property>
        <property name="password" value="${password}"></property>
        <property name="driverClassName" value="${driver}"></property>
        <property name="url" value="${url}"></property>
    </bean>

</beans>

public class Utils_jdbc {

    public static void main(String[] args) {

        ApplicationContext ctc = new ClassPathXmlApplicationContext("applicationContext.xml");

        DriverManagerDataSource dSource = (DriverManagerDataSource) ctc.getBean("connection");

        try {

            System.out.println(dSource.getConnection());
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

}