java - NoSuchBeanDefinition异常 : No qualifying bean of type 'org.springframework.mail.MailSender'

Question

我试图在我的 ApplicationListener 中使用 MailSender，通过 Autowiring SpringContext:

package example.util.emailUtil;

@Component
public class PostUserListener implements ApplicationListener<OnPostUserDataEvent> {

@Autowired
private MailSender mailSender;
}

配置类是:

 @ComponentScan(basePackages ={"example.util.emailUtil","example.model","example.service"})
 @Configuration
 public class MailProvider {

   @Bean(name = "mailSender")
   public MailSender javaMailService() 
    JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();
    javaMailSender.setHost("smtp.gmail.com");
    javaMailSender.setPort(587);
    javaMailSender.setProtocol("smtp");
    javaMailSender.setUsername("sender’s email");
    javaMailSender.setPassword("sender’s password");
    Properties mailProperties = new Properties();
    mailProperties.put("mail.smtp.auth", "true");
    mailProperties.put("mail.smtp.starttls.enable", "true");
    mailProperties.put("mail.smtp.debug", "true");
    javaMailSender.setJavaMailProperties(mailProperties);
    return javaMailSender;
   }
 }

但是我发现了以下异常:

 NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.mail.MailSender' available: expected at least 1 bean which qualifies as autowire candidat

Answer 1

它不会将您的 MailSender 类视为可以使用 @autowired 注释的类或我们可以注入(inject)的 bean。并检查是否添加了@component、@service或其他注释。也许还会有其他错误。这个来自那里。