@Test
public void testAnnoConfiguration() throws Exception {
ApplicationContext applicationContext = new
          AnnotationConfigApplicationContext(SpringConfiguration.class);    UserService userService = (UserService)   
    applicationContext.getBean("userService");
    userService.save();
    DataSource dataSource = (DataSource)
    applicationContext.getBean("dataSource");
    Connection connection = dataSource.getConnection();
    System.out.println(connection);
    }

@Test
public void testAnnoConfiguration() throws Exception {
ApplicationContext applicationContext = new
          AnnotationConfigApplicationContext(SpringConfiguration.class);    UserService userService = (UserService)   
    applicationContext.getBean("userService");
    userService.save();
    DataSource dataSource = (DataSource)
    applicationContext.getBean("dataSource");
    Connection connection = dataSource.getConnection();
    System.out.println(connection);
    }