Spring4学习（二）简单的注解

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        使用Spring注解，首先需要安装spring-aop.jar包，在配置文件中添加开启注解的配置

        下面是使用注解的简单的实例

@Service("contactsManagerService")
public class ContactsManagerServiceImpl implements ContactsManagerService {

	private ContactsManagerDao contactsManagerDao;

	public ContactsManagerDao getContactsManagerDao() {
		return contactsManagerDao;
	}

	@Qualifier("contactsManagerDao")
	@Autowired
	public void setContactsManagerDao(ContactsManagerDao contactsManagerDao) {
		this.contactsManagerDao = contactsManagerDao;
	}

	@Override
	public String getContacts() {
		return contactsManagerDao.get();
	}

}

 

@Component("contactsManagerDao")
public class ContactsManagerDaoImpl implements ContactsManagerDao {

	@Override
	public String get() {
		String value = "ContactsDao.get()";
		return value;
	}

}

 单元测试类

public class App {

	public static void main(String[] args) {
		String classPath = "classpath*:conf/spring/app_*.xml";
		// ApplicationContext context = new ClassPathXmlApplicationContext(
		// new String[] { "services.xml", "daos.xml" });
		ApplicationContext context = new ClassPathXmlApplicationContext(classPath);
		GroupManagerService service = context.getBean(GroupManagerService.class);
		System.out.println(service.getGroup());
		ContactsManagerService service2 = context.getBean("contactsManagerService",
				ContactsManagerService.class);
		System.out.println(service2.getContacts());

	}
}