@Configuration
@ComponentScan("com.lan")
@Import({DataSourceConfiguration.class})
public class SpringConfiguration {
}

@PropertySource("classpath:jdbc.properties")
public class DataSourceConfiguration {
    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;
    .....
}  

@Bean(name="dataSource")
public DataSource getDataSource() throws PropertyVetoException {
ComboPooledDataSource dataSource = new ComboPooledDataSource();
    dataSource.setDriverClass(driver);
    dataSource.setJdbcUrl(url);
    dataSource.setUser(username);
    dataSource.setPassword(password);
    return dataSource;
}

@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);
}