Question

我正在尝试实现一个Spring电子邮件服务，为此我实现了GOOF设计模式。我创建了一个接口电子邮件服务，如下所示。

public interface EmailService {

public void sendFeedbackEmail(FeedbackPojo feedbackPojo);

public void sendGenericEmailMessage(SimpleMailMessage message);

}

然后我创建了一个抽象类，它扩展了这个接口并实现了它的一个重写方法，即sendFeedbackEmail(FeedBackPojo feedbackpojo)这个抽象类的实现如下。

public abstract class AbstractEmailService implements EmailService {

@Value("@{default.to.address}")
private String defaultToAddress ;

protected SimpleMailMessage preparedSimpleMailMessageFromFeedbackPojo(FeedbackPojo feedback){
    SimpleMailMessage message = new SimpleMailMessage();
    message.setTo(defaultToAddress);
    message.setFrom(feedback.getEmail());
    message.setSubject("[Subscriber]: Feedback Received from"+ feedback.getFirstName()+" "+feedback.getLastName()+"!");
    message.setText(feedback.getFeedback());

    return message;
}

@Override
public void sendFeedbackEmail(FeedbackPojo feedbackPojo) {
    sendGenericEmailMessage(preparedSimpleMailMessageFromFeedbackPojo(feedbackPojo));
}

}

然后我创建了一个MockEmailService类，它实现了EmailService接口的第二个方法，即sendGenericEmail（SimpleMailMessage message），如下所示

公共类MockEmailService扩展了AbstractEmailService {

private static final Logger log = 
LoggerFactory.getLogger(MockEmailService.class);

@Override
public void sendGenericEmailMessage(SimpleMailMessage message) {
    System.out.println(message.toString());
}

}

然后我在我的控制器类中创建了一个autowired对象的emailService，并按如下方式模拟我的电子邮件服务

@Controller

public class ContactController {

private static final org.slf4j.Logger log = LoggerFactory.getLogger(ContactController.class);
public static final String FEEDBACK_MODEL_KEY="feedback";
private static final String CONTACT_US_VIEW_NAME="contact/contact";

@Autowired
private EmailService emailService;


@RequestMapping(value = "/contact",method = RequestMethod.GET)
public String getContact(ModelMap model){
    FeedbackPojo feedbackPojo = new FeedbackPojo();
    model.addAttribute(ContactController.FEEDBACK_MODEL_KEY,feedbackPojo);
    return ContactController.CONTACT_US_VIEW_NAME;
}

@RequestMapping(value = "/contact",method = RequestMethod.POST)
public String postContact(@ModelAttribute(FEEDBACK_MODEL_KEY) FeedbackPojo feedback){
    log.debug("Feedback content {}",feedback);
    emailService.sendFeedbackEmail(feedback);
    return ContactController.CONTACT_US_VIEW_NAME;
}

}

但是，当我尝试运行我的应用程序时，应用程序终止，我收到的错误如下

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.subscriptionservice.backend.service.EmailService com.subscriptionservice.web.controllers.ContactController.emailService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.subscriptionservice.backend.service.EmailService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

有人可以在我的实施中指出问题。谢谢。

Answer 1

没有类型的限定bean 找到[com.subscriptionservice.backend.service.EmailService] 依赖

据我所知，您尚未将接口EmailService的实例引入Spring管理的bean集合中。

尝试使用MockEmailService对@Service进行注释（刻板印象）。

也...

确保以某种方式定义了component-scan，其中包含MockEmailService所在的包。
您是否打算MockEmailService在您的申请中永久实施EmailService合同？（根据名称，我不会这么认为。）如果MockEmailService仅用于某些情况 - 例如非生产部署或测试 - 您可能需要一个更灵活的系统来定义或连接您的豆子。有很多选项，例如Spring Profiles。

无法获得春季电子邮件的工作

1 个答案: