Не удалось создать поле autowire: private org.springframework.mail.javamail.JavaMailSender com.badmap.controller.SignUpController.javaMailSender;

Question

Моя программа дает мне сообщение об ошибке «Не удалось автополе поля», может ли кто-нибудь помочь мне с этим?

@RestController 
public class SignUpController { 

    @Autowired 
    private UserRepository repo; 

    @Autowired 
    private JavaMailSender javaMailSender; 

    @RequestMapping(method = RequestMethod.POST, value = "/signup") 
    public @ResponseBody 
    Object create(@Valid @RequestBody User user, BindingResult result, Errors error) throws MessagingException { 
     //Check the result, if error, return error and don't add user 
     System.out.println("Result: " + result); 
     if (result.hasErrors()) { 
      FieldError fieldError = result.getFieldError(); 
      if (fieldError.getField().equals("email")) { 
       throw new DuplicateEmailException(); 
      } 
      //Lazy Else 
      throw new DuplicateUsernameException(); 
    } 

    User newUser = User.createUser(user.getUsername(), user.getEmail(), user.getPassword()); 

    //String emailMessage = "Thank you, you username is"+user.getUsername(); 
    SimpleMailMessage mailmessage = new SimpleMailMessage(); 
    mailmessage.setTo(newUser.getEmail()); 
    mailmessage.setSubject("Registration"); 
    mailmessage.setText("Hello " +newUser.getUsername() +"\n Your registration is successfull"); 

    javaMailSender.send(mailmessage); 
    return repo.save(newUser); 

} 

Ниже выводится:

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.javamail.JavaMailSender com.badmap.controller.SignUpController.javaMailSender; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] 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)} 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561) 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331) 
    ... 16 common frames omitted 
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1301) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1047) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942) 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533) 
    ... 18 common frames omitted 

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'signUpController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.javamail.JavaMailSender com.badmap.controller.SignUpController.javaMailSender; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] 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)} 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210) 

Answer 1

Ваше сообщение об ошибке также упоминает, что нет квалификационная боб, который реализует JavaMailSender

NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSender] 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)} 

Вы либо не имеют компонент, который реализует JavaMailSender или это не в сфере охвата.