无法自动连线org.springframework.mail.javamail.JavaMailSender

问题内容：

尝试运行我的应用程序时出现以下问题。已经调试了一切，仍然一无所获。

IDE正在查找bean，没有任何问题，所以我对这里发生的事情感到非常困惑。

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailManager': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void com.testmail.app.service.implement.CustomMManagerService.setMailSender(org.springframework.mail.javamail.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: {}

我的bean生成位于以下文件中：

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.testmail.app")
public class WebConfig extends WebMvcConfigurerAdapter {
 //CODE CODE CODE

    @Bean
    public JavaMailSenderImpl mailSender() {
        JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();

        javaMailSender.setProtocol("SMTP");
        javaMailSender.setHost("127.0.0.1");
        javaMailSender.setPort(25);

        return javaMailSender;
    }

// CODE CODE CODE
}

CustomMManager的代码：

public interface CustomMManager extends Serializable {
    void sendMail(String mailFrom,String mailTo,String subject,String mailBody);
}

最后是CustomMManagerService的代码：

@Service("mailManager")
public class CustomMManagerService implements CustomMManager {
    private JavaMailSender mailSender;

    @Autowired
    public void setMailSender(JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }

    @Override
    public void sendMail(final String mailFrom, final String mailTo, final String subject, final String mailBody) {
        try {
            mailSender.send(new MimeMessagePreparator() {
                public void prepare(MimeMessage mimeMessage)
                        throws Exception {
                    MimeMessageHelper message = new MimeMessageHelper(mimeMessage,
                            false, "UTF-8");
                    message.setFrom(mailFrom);
                    message.addTo(mailTo);
                    message.setSubject(subject);
                    message.setText(mailBody, true);
                }
            });
        } catch (MailSendException e) {
            // your codes;
        }
    }
}

非常感谢您的帮助。

问题答案：

根据mserioli的评论，答案是必须在根调用的配置文件中声明Bean。

在这种情况下：移动

@Bean
    public JavaMailSenderImpl mailSender()

至

public class ExtraConfig {
@Bean
    public JavaMailSenderImpl mailSender() {
        JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();

        javaMailSender.setProtocol("SMTP");
        javaMailSender.setHost("127.0.0.1");
        javaMailSender.setPort(25);

        return javaMailSender;
    }
}

称为：

@Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class<?>[]{ExtraConfig.class};
    }

从而解决问题。谢谢大家的帮助。

无法自动连线org.springframework.mail.javamail.JavaMailSender

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