深入理解java的spring-ioc的使用

public interface EmailLogService {
 void send(String email, String message);
}

@Component()
public class EmailLogServiceHttpImpl implements EmailLogService {
 private static final Logger logger = LoggerFactory.getLogger(EmailLogServiceHttpImpl.class);

 @Override
 public void send(String email, String message) {
 Assert.notNull(email, "email must not be null!");
 logger.info("send email:{},message:{}", email, message);
 }
}
@Component("email-socket")
public class EmailLogServiceSocketImpl implements EmailLogService {
 private static final Logger logger = LoggerFactory.getLogger(EmailLogServiceSocketImpl.class);

 @Override
 public void send(String email, String message) {
 Assert.notNull(email, "email must not be null!");
 logger.info("send email2:{},message:{}", email, message);
 }
}
// 看一下调用时的测试代码
 @Resource(name = "email-socket")
 EmailLogService socketEmail;
 @Autowired
 @Qualifier( "emailLogServiceHttpImpl")
 EmailLogService httpEmail;

 @Test
 public void testIoc2() {
 socketEmail.send("ok", "ok");
 }


 @Test
 public void testIoc1() {
 httpEmail.send("ok", "ok");
 }

class Api_version1(){
@Autowired 
@Qualifier("print-version1")
PrintService printService;
}

class Api_version2(){
@Autowired 
@Qualifier("print-version2")
PrintService printService;
}

class BasePrintService{}

interface PrintService{}

@Service("print-version1")
class PrintServiceImplVersion1 extends BasePrintService implements PrintService{}

@Service("print-version2")
class PrintServiceImplVersion2 extends BasePrintService implements PrintService{}