Spring项目中使用Junit单元测试并配置数据源的操作

<?xml version="1.0" encoding="UTF-8"?>
    <beans:beans xmlns:beans="http://www.springframework.org/schema/beans"  
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                 xmlns:context="http://www.springframework.org/schema/context"
                 xmlns:aop="http://www.springframework.org/schema/aop"
                 xmlns:tx="http://www.springframework.org/schema/tx"
                 xsi:schemaLocation="http://www.springframework.org/schema/beans
                 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                 http://www.springframework.org/schema/context
                 http://www.springframework.org/schema/context/spring-context-3.0.xsd
                 http://www.springframework.org/schema/aop
                 http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
                 http://www.springframework.org/schema/tx
                 http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
    <beans:bean id="dataSource" 
                class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <beans:property name="driverClassName" value="oracle.jdbc.OracleDriver" />
    <beans:property name="url" value="jdbc:oracle:thin:@127.0.0.1:1521:sjk" />
    <beans:property name="username" value="username" />
    <beans:property name="password" value="password" />
    </beans:bean>
</beans:beans>

public class CommonDAOJdbc_StandardTest {
    private volatile static BeanFactory factory;
    @Test
    public void testGetFirmCanOutBalance() {
        // 获取Bean
        CommonDAO commonDAO = (CommonDAO) factory.getBean("commonDAO");
        // 此处可调用CommonDAO类中的方法
    }
    @Before
    public void init() {
        System.out.println("加载spring配置开始 ............");
        ArrayList<String> list = new ArrayList<String>();
        list.add("spring.xml");            // 将Sprint配置文件加入待加载列表
        list.add("Spring_jndi_test.xml");  // 将测试用的数据源配置文件加入待加载列表
        try {
            factory = new ClassPathXmlApplicationContext(list.toArray(new String[list.size()]));
            // 保证虚拟机退出之前 spring中singtleton对象自定义销毁方法会执行
            ((AbstractApplicationContext) factory).registerShutdownHook();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("加载配置文件时发生错误" + e);
        }
        System.out.println("加载spring配置结束.............");
    }
}