SpringBoot-Mail工具实现邮箱验证码登录注册功能

<!--邮箱依赖-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<!--redis依赖-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

public class MailConstant {
   /**
    * 邮箱验证redis前缀
    */
   public static final String CODE_KEY_PREFIX = "mail:";
}

@Slf4j
@Service
public class MailUtils {
   @Resource
   RedisTemplate<String, Integer> redisTemplate;
   @Resource
   private JavaMailSenderImpl mailSender;
   public void sendMail(Mail mail) throws MailSendException {
      try {
         MimeMessageHelper messageHelper = new MimeMessageHelper(mailSender.createMimeMessage(), true);
      if (mail.getFrom() == null || mail.getFrom().isEmpty()) {
         mail.setFrom("xxx");
      }
      //邮件发信人
      messageHelper.setFrom(mailSender.getUsername() + '(' + mail.getFrom() + ')');
      //邮件收信人
      messageHelper.setTo(mail.getTo().split(","));
      //邮件主题
      messageHelper.setSubject(mail.getSubject());
      //邮件内容
      messageHelper.setText(mail.getText());
      //发送邮件
      mailSender.send(messageHelper.getMimeMessage());
      } catch (Exception e) {
         log.warn("邮件发送失败：{}", e.getMessage());
         throw new MailSendException("邮件发送失败:" + e.getMessage());
      }
   }
   /**
    * 发送验证码邮件
    *
    * @param mail 邮件信息
    */
   public void sendVerificationCode(Mail mail) {
      // 判断当前待发送邮箱是否已经有验证码
      String key = CODE_KEY_PREFIX + mail.getTo();
      Integer code = redisTemplate.opsForValue().get(key);
      if (code != null) {
         throw new UserException("当前邮箱已经发送验证码");
      }
      // 生成随机 6位验证码
      int idenCode = (int) ((Math.random() * 9 + 1) * 100000);
      mail.setSubject("xxx");
      mail.setText("验证码：" + idenCode);
      redisTemplate.opsForValue().set(key, idenCode, 60, TimeUnit.SECONDS);
      sendMail(mail);
   }
}

/**
 * 发送邮箱验证码
 *
 * @param email 用户邮箱
 * @return 发送结果
 */
@PostMapping("send/code")
public Result<?> sendUserMail(String email) {
    Mail mail = new Mail();
    mail.setTo(email);
    mailUtils.sendVerificationCode(mail);
    return Result.ok(null, "发送成功");
}

@Override
public boolean userRegister(User user, Integer captcha) {
    //判断用户是否已经注册
    User exist = getOne(Wrappers.<User>lambdaQuery().eq(User::getMail, user.getMail()));
    if(exist!=null){
        throw new UserException("用户已注册");
    }
    // 判断验证码是否相同
    String key = CODE_KEY_PREFIX + user.getMail();
    Integer authcode = (Integer) redisTemplate.opsForValue().get(key);
    if (authcode == null) {
        throw new UserException("验证码已过期，请重新发送");
    }
    if (!authcode.equals(captcha)) {
        throw new UserException("验证码错误");
    }
    return userMapper.insert(user)>0;
}