邮件多人同时发送

引入pom坐标

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

yml配置文件

spring  
  ## 邮件配置
  mail:
    # 邮件服务地址
    host: smtp.exmail.qq.com
    # 端口,可不写默认
    port: 465
    # 编码格式
    default-encoding: utf-8
    # 用户名
    username: blog@songzixian.com
    # 授权码，就是我们刚才准备工作获取的代码
    password: 123456
    # 其它参数
    properties:
      mail:
        smtp:
          # 如果是用 SSL 方式，需要配置如下属性,使用qq邮箱的话需要开启
          ssl:
            enable: true
            required: true
          # 邮件接收时间的限制，单位毫秒
          timeout: 10000
          # 连接时间的限制，单位毫秒
          connectiontimeout: 10000
          # 邮件发送时间的限制，单位毫秒
          writetimeout: 10000

ResponseResult通用数据的传输对象工具类https://songzixian.com/javatuils/1084.html
创建接口

/**
 * <p>
 * Description:
 * </p>
 *
 * @author songzixian
 * @version v1.0.0
 * @create 2021-01-11 17:20
 * @see com.greatdata.service
 */
public interface MailService {
    public JavaMailSender sendMail(List<String> recipients, String tile, String centent);
}

//创建实现类

/**
 * <p>
 * Description: 邮件发送服务
 * </p>
 *
 * @author songzixian
 * @version v1.0.0
 * @create 2021-01-11 17:20
 * @see com.greatdata.service.impl
 */
@Slf4j
@Service
public class MailServiceImpl implements MailService {

    @Autowired
    private JavaMailSender javaMailSender;

    /**
     * 邮件发送者
     */
    private static final String SENDER = "blog@songzixian.com";

    /**
     * description 邮件发送
     * @params  []
     * @return {@link ResponseResult}
     */
    @Override
    public JavaMailSender sendMail(List<String> recipients, String tile, String centent) {
        //创建数组
        String[] strings = new String[recipients.size()];
        //把集合转为数组
        recipients.toArray(strings);
        //创建消息
        MimeMessage message = javaMailSender.createMimeMessage();

        try {
            //true表示需要创建一个multipart message
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            // 不带昵称
            helper.setFrom(SENDER);
            // 自定义昵称
             // helper.setFrom("定时服务系统"+'<'+SENDER+'>');
            //多人发送邮件
            helper.setTo(strings);
            //邮件标题
            helper.setSubject(tile);
            //邮件内容,支持html
            helper.setText(centent, true);
            JavaMailSender javaMailSender = this.javaMailSender;
            javaMailSender.send(message);
        } catch (MessagingException e) {
            log.error("发送MimeMessge时发生异常,日志是:" + e);
            return javaMailSender;
        }
        return javaMailSender;
    }
}

控制层

/**
 * <p>
 * Description:
 * </p>
 *
 * @author songzixian
 * @version v1.0.0
 * @create 2021-01-12 10:09
 * @see com.greatdata.controller
 */
@Log4j2
@RestController
public class MailController {

    @Autowired
    private MailService mailService;
    /**
     * description 邮件发送服务
     * @params  [recipients 收件人, tile 邮件标题, centent 邮件内容]
     * @return {@link ResponseResult}
     */
    @RequestMapping("sendMail")
    public ResponseResult sendMail(@RequestParam List<String> recipients, String tile, String centent){
       if (recipients==null||recipients.size()==0){
           return new ResponseResult(ResponseCode.FAILURE,"邮件接收人不能为空!");
       }

        try {
            mailService.sendMail(recipients,tile,centent);
        }catch (Exception e){
            return new ResponseResult(ResponseCode.FAILURE,"邮件发送失败");
        }
        return new ResponseResult(ResponseCode.SUCCESS,"邮件发送成功");
    }
}

测试地址:http://localhost:8080/sendMail?recipients=me@songzixian.com,admin@52xbc.cn&tile=邮件标题&centent=邮件内容,支持html