引入 spring-test.jar
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringDemo3 {
    @Resource(name="orderDao")
    private OrderDao orderDao;
    @Test
    public void demo1(){
        orderDao.save();
        orderDao.update();
        orderDao.delete();
        orderDao.find();
    }
}