依赖

spring-boot-starter-mail

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>

配置信息

spring:
  mail:
    protocol: smtp
    host: smtp.qq.com
    username: 306590769@qq.com
    password: yahbjaebcsxvbgib
    default-encoding: UTF-8
    properties:
      mail:
        smtp:
          auth: true
          starttls:
            enable: true
            required: true
    test-connection: true

封装

@Service
public class EmailServiceImpl implements EmailService {
    @Value("${spring.mail.username}")
    private String from;

    @Autowired
    private JavaMailSender javaMailSender;

    @Override
    public void sendAuthCode(String to,String authCode) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(from);
        message.setTo(to);
        message.setSubject("验证码");
        message.setText(authCode);
        javaMailSender.send(message);
    }
}