ello我正在使用springboot创建一个web应用程序，在相关代码中，我允许单击一个按钮，从数据库中删除一个对象，然后向该对象的电子邮件地址发送一封电子邮件。在我添加电子邮件部分之前，当单击按钮时，它工作得很好，并且行从表中删除，但是现在我得到一个错误：
java.lang.illegalstateexception:没有为作用域名称“restart”注册作用域
我认为这与控制器中的上下文有关：控制器：

@RequestMapping("/rejectApplicant")
@ResponseBody
public String rejectApplicant(@RequestParam String id, HttpServletRequest request, HttpServletResponse response, Model model) {
    Long athleteID = Long.parseLong(id);
    Optional<Athlete> optionalAthlete = athleteAuditor.findAthleteById(athleteID);
    Athlete athlete = optionalAthlete.get();
    AbstractApplicationContext context = new AnnotationConfigApplicationContext(
            EmailConfig.class);
    MailService mailService = context.getBean("mailService", MailServiceImp.class);
    System.out.println("//////         " + mailService.toString());
    String senderEmailId = "Z@gmail.com";
    String receiverEmailId = athlete.getEmail();
    System.out.println("//////         " + receiverEmailId);
    String subject = "Your time at Lyons";
    String message = "Dear " + athlete.getName() + "How goes it?";
    mailService.sendEmail(senderEmailId, receiverEmailId, subject, message);
    context.close();
 athleteAuditor.deleteAthlete(athleteID);
 return "applicants";
}

//配置

@Configuration
@ComponentScan(basePackages = "xda")
public class EmailConfig {

u/Bean
 public JavaMailSender getMailSender()
    {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();

// Using Gmail SMTP configuration.
 mailSender.setHost("smtp.gmail.com");
        mailSender.setPort(587);

/*
         * Use your gmail id and password
         */
 mailSender.setUsername("X@gmail.com");
        mailSender.setPassword("Y");

       Properties javaMailProperties = new Properties();
        javaMailProperties.put("mail.smtp.starttls.enable", "true");
        javaMailProperties.put("mail.smtp.auth", "true");
        javaMailProperties.put("mail.transport.protocol", "smtp");
        javaMailProperties.put("mail.debug", "true");

       mailSender.setJavaMailProperties(javaMailProperties);
 return mailSender;
    }
}

//邮件服务imp

@Service("mailService")
public class MailServiceImp implements MailService
{

u/Autowired

JavaMailSender mailSender;

public void sendEmail(final String senderEmailId, final String receiverEmailId,
 final String subject, final String message)
    {

       MimeMessagePreparator prep = new MimeMessagePreparator()
        {

public void prepare(MimeMessage mimeMessage) throws Exception
            {
                mimeMessage.setFrom(senderEmailId);
                mimeMessage.setRecipient(Message.RecipientType.TO,
 new InternetAddress(receiverEmailId));
                mimeMessage.setSubject(subject);
                mimeMessage.setText(message);

           }
        };

try
 {
 mailSender.send(prep);
            System.out.println("Successfully sent message");
        }
 catch (Exception exe)
        {
            exe.printStackTrace();
        }
    }
}

//邮件服务

public interface MailService
{
 public void sendEmail(final String senderEmailId, final String receiverEmailId,
 final String subject, final String message);
}

抱歉，有这么多的代码，我不知道是什么原因，这是我第一次尝试使用SpringBootStarter邮件，谢谢任何帮助！