【JavaMail】JavaMail整合RabbitMq发送邮件案例

前言

Linux安装RabbitMQ：https://www.cnblogs.com/jxd283465/p/11975094.html

SpringBoot整合RabbitMQ：https://www.cnblogs.com/jxd283465/p/11975136.html

流程

代码

 数据库表

CREATE TABLE `msg_log` (
  `msg_id` varchar(255) NOT NULL DEFAULT '' COMMENT '消息唯一标识',
  `msg` text COMMENT '消息体, json格式化',
  `exchange` varchar(255) NOT NULL DEFAULT '' COMMENT '交换机',
  `routing_key` varchar(255) NOT NULL DEFAULT '' COMMENT '路由键',
  `status` int(11) NOT NULL DEFAULT '0' COMMENT '状态: 0投递中 1投递成功 2投递失败 3已消费',
  `try_count` int(11) NOT NULL DEFAULT '0' COMMENT '重试次数',
  `next_try_time` datetime DEFAULT NULL COMMENT '下一次重试时间',
  `create_time` datetime DEFAULT NULL COMMENT '创建时间',
  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (`msg_id`),
  UNIQUE KEY `unq_msg_id` (`msg_id`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='消息投递日志';

邮件发送类

package cc.mrbird.febs.common.utils;
/**
 * 邮件发送工具类。
 * 以下邮件中的配置参数，请在实际环境中，根据需要采取合适的配置方式。
 * 发送邮件依赖 com.sun.mail（1.6.1） 包、javax.mail（1.5.0-b01） 包。
 * 如果使用 Idea 运行，请将这两个包（可以直接到Maven目录下面去找）添加到项目的 Libraries 里面（快捷键：Ctrl + Alt + Shift + S）
 *
 * @author Zebe
 */
public class SendEmailUtil {

    /**
     * 发件人别名（可以为空）
     */
    private final static String fromAliasName = "***";

    /**
     * 登录用户名
     */
    private String ACCOUNT;

    /**
     * 登录密码
     */
    private String PASSWORD;

    /**
     * 邮件服务器地址
     */
    //QQ企业邮箱：smtp.exmail.qq.com
    //网易企业邮箱：smtphz.qiye.163.com
    private String HOST;

    /**
     * 发信端口
     */
    //QQ企业邮箱：465
    //网易企业邮箱：994
    private String PORT;

    /**
     * 发信协议
     */
    private final static String PROTOCOL = "ssl";

    /**
     * 收件人
     */
    private String to;

    /**
     * 收件人名称
     */
    private String toName;

    /**
     * 主题
     */
    private String subject;

    /**
     * 内容
     */
    private String content;

    /**
     * 附件列表（可以为空）
     */
    private List<String> attachFileList;

    /**
     * 构造器
     *
     * @param attachFileList 附件列表
     */
    public SendEmailUtil(MailTemplate mailTemplate, List<String> attachFileList) {
        this.to = mailTemplate.getTo();
        this.toName = mailTemplate.getToName();
        this.subject = mailTemplate.getSubject();
        this.content = mailTemplate.getContent();
        this.attachFileList = attachFileList;
        this.ACCOUNT = mailTemplate.getAccount();
        this.PASSWORD = mailTemplate.getPassword();
        switch (mailTemplate.getSendType()) {
            case "qq":
                this.HOST = "smtp.exmail.qq.com";
                this.PORT = "465";
                break;
            case "163":
                this.HOST = "smtp.ym.163.com";
                this.PORT = "994";
                break;
        }
    }

    /**
     * 认证信息
     */
    static class MyAuthenticator extends Authenticator {

        /**
         * 用户名
         */
        String username = null;

        /**
         * 密码
         */
        String password = null;

        /**
         * 构造器
         *
         * @param username 用户名
         * @param password 密码
         */
        public MyAuthenticator(String username, String password) {
            this.username = username;
            this.password = password;
        }

        @Override
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
    }

    /**
     * 发送邮件
     */
    public boolean send() {
        // 设置邮件属性
        Properties prop = new Properties();
        prop.setProperty("mail.transport.protocol", PROTOCOL);
        prop.setProperty("mail.smtp.host", HOST);
        prop.setProperty("mail.smtp.port", PORT);
        prop.setProperty("mail.smtp.auth", "true");
        MailSSLSocketFactory sslSocketFactory = null;
        try {
            sslSocketFactory = new MailSSLSocketFactory();
            sslSocketFactory.setTrustAllHosts(true);
        } catch (GeneralSecurityException e1) {
            e1.printStackTrace();
        }
        if (sslSocketFactory == null) {
            System.err.println("开启 MailSSLSocketFactory 失败");
        } else {
            prop.put("mail.smtp.ssl.enable", "true");
            prop.put("mail.smtp.ssl.socketFactory", sslSocketFactory);
            // 创建邮件会话（注意，如果要在一个进程中切换多个邮箱账号发信，应该用 Session.getInstance）
            Session session = Session.getDefaultInstance(prop, new MyAuthenticator(ACCOUNT, PASSWORD));
            // 开启调试模式（生产环境中请不要开启此项）
            session.setDebug(true);
            try {
                MimeMessage mimeMessage = new MimeMessage(session);
                // 设置发件人别名（如果未设置别名就默认为发件人邮箱）
                mimeMessage.setFrom(new InternetAddress(ACCOUNT, fromAliasName));
                // 设置主题和收件人、发信时间等信息
                mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(to, toName));
                mimeMessage.setSubject(subject);
                mimeMessage.setSentDate(new Date());
                // 如果有附件信息，则添加附件
                if (!attachFileList.isEmpty()) {
                    Multipart multipart = new MimeMultipart();
                    MimeBodyPart body = new MimeBodyPart();
                    body.setContent(content, "text/html; charset=UTF-8");
                    multipart.addBodyPart(body);
                    // 添加所有附件（添加时判断文件是否存在）
                    for (String filePath : attachFileList) {
                        if (Files.exists(Paths.get(filePath))) {
                            MimeBodyPart tempBodyPart = new MimeBodyPart();
                            tempBodyPart.attachFile(filePath);
                            multipart.addBodyPart(tempBodyPart);
                        }
                    }
                    mimeMessage.setContent(multipart);
                } else {
                    Multipart multipart = new MimeMultipart();
                    MimeBodyPart body = new MimeBodyPart();
                    body.setContent(content, "text/html; charset=UTF-8");
                    multipart.addBodyPart(body);
                    mimeMessage.setContent(multipart);
                    //mimeMessage.setText(content);
                }
                // 开始发信
                mimeMessage.saveChanges();
                Transport.send(mimeMessage);
                return true;
            } catch (MessagingException | IOException e) {
                e.printStackTrace();
                return false;
            }
        }
        return false;
    }
}

邮件模板

@Data
@NoArgsConstructor
public class MailTemplate implements Serializable {

    private String msgId;
    /**
     * 收件人
     */
    private String to;

    /**
     * 收件人名称
     */
    private String toName;

    /**
     * 主题
     */
    private String subject;

    /**
     * 内容
     */
    private String content;

    /**
     * 附件列表
     */
    private List<String> attachFileList;

    /**
     * 邮箱账号
     */
    private String account;

    /**
     * 邮箱密码
     */
    private String password;

    /**
     * 邮箱类型
     */
    private String sendType;

    /**
     * 构造器
     *
     * @param to      收件人
     * @param subject 主题
     * @param content 内容
     */
    public MailTemplate(String account, String password, String sendType, String to, String toName, String subject, String content) {
        this.account = account;
        this.password = password;
        this.sendType = sendType;
        this.to = to;
        this.toName = toName;
        this.subject = subject;
        this.content = content;
    }

    /**
     * 构造器
     *
     * @param to             收件人
     * @param subject        主题
     * @param content        内容
     * @param attachFileList 附件列表
     */
    public MailTemplate(String account, String password, String sendType, String to, String toName, String subject, String content, List<String> attachFileList) {
        this(account, password, sendType, to, toName, subject, content);
        this.attachFileList = attachFileList;
    }
}

rabbit mq配置类

@Configuration
@Slf4j
public class RabbitConfig {

    // 发送邮件
    public static final String MAIL_QUEUE_NAME = "mail.queue";
    public static final String MAIL_EXCHANGE_NAME = "mail.exchange";
    public static final String MAIL_ROUTING_KEY_NAME = "mail.routing.key";
    public final static Integer MAIL_DELIVER_SUCCESS = 1;
    public final static Integer MAIL_DELIVER_FAIL = 2;
    public final static Integer MAIL_CONSUMED_SUCCESS = 3;
    public static boolean ENABLE_SCHEDULED = false;
    private final CachingConnectionFactory connectionFactory;

    @Autowired
    private IMsgLogService iMsgLogService;

    public RabbitConfig(CachingConnectionFactory connectionFactory) {
        this.connectionFactory = connectionFactory;
    }

    @Bean
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        rabbitTemplate.setMessageConverter(converter());

        // 消息是否成功发送到Exchange
        rabbitTemplate.setConfirmCallback((correlationData, ack, cause) -> {
            if (ack) {
                log.info("消息成功发送到Exchange");
                String msgId = correlationData.getId();
                UpdateWrapper<MsgLog> updateWrapper = new UpdateWrapper<>();
                updateWrapper.eq("msg_id",msgId);
                MsgLog msgLog = new MsgLog();
                msgLog.setStatus(MAIL_DELIVER_SUCCESS);
                iMsgLogService.update(msgLog, updateWrapper);
            } else {
                log.info("消息发送到Exchange失败, {}, cause: {}", correlationData, cause);
            }
        });

        // 触发setReturnCallback回调必须设置mandatory=true, 否则Exchange没有找到Queue就会丢弃掉消息, 而不会触发回调
        rabbitTemplate.setMandatory(true);
        // 消息是否从Exchange路由到Queue, 注意: 这是一个失败回调, 只有消息从Exchange路由到Queue失败才会回调这个方法
        rabbitTemplate.setReturnCallback((message, replyCode, replyText, exchange, routingKey) -> {
            log.info("消息从Exchange路由到Queue失败: exchange: {}, route: {}, replyCode: {}, replyText: {}, message: {}", exchange, routingKey, replyCode, replyText, message);
        });

        return rabbitTemplate;
    }

    @Bean
    public Jackson2JsonMessageConverter converter() {
        return new Jackson2JsonMessageConverter();
    }

    @Bean
    public Queue mailQueue() {
        return new Queue(MAIL_QUEUE_NAME, true);
    }

    @Bean
    public DirectExchange mailExchange() {
        return new DirectExchange(MAIL_EXCHANGE_NAME, true, false);
    }

    @Bean
    public Binding mailBinding() {
        return BindingBuilder.bind(mailQueue()).to(mailExchange()).with(MAIL_ROUTING_KEY_NAME);
    }

}

生产者

@RestController
@RequestMapping("mail")
public class MailController {

    @Autowired
    private IMsgLogService iMsgLogService;
    @Autowired
    private RabbitTemplate rabbitTemplate;
  

    @PostMapping("/test")
    public void test(String account, String password, String sendType) {
        try {
            for (int j = 1; j <= 3; j++) {
                for (int i = 1; i <= 15; i++) {
                    for (int num = 1; num <= 73; num++) {
                        // 设置发信参数
                        final String toName = "我是" + num + "号";
                        final String to = "test" + num + "@forexgwg.com";
                        String subject = num + " 第" + num + "次发送测试邮件标题";
                        final String content = "<p style='color:red'>这是邮件内容正文。</p></br>";
                        MailTemplate mailTemplate = new MailTemplate();
                        String msgId = UUID.randomUUID().toString();
                        mailTemplate.setMsgId(msgId);
                        mailTemplate.setAccount(account);
                        mailTemplate.setPassword(password);
                        mailTemplate.setSendType(sendType);
                        mailTemplate.setToName(toName);
                        mailTemplate.setTo(to);
                        mailTemplate.setSubject(subject);
                        mailTemplate.setContent(content);
                        mailTemplate.setAttachFileList(new ArrayList<>());

                        MsgLog msgLog = new MsgLog(msgId, JSON.toJSONString(mailTemplate), RabbitConfig.MAIL_EXCHANGE_NAME, RabbitConfig.MAIL_ROUTING_KEY_NAME, LocalDateTime.now());
                        iMsgLogService.save(msgLog);
                        CorrelationData correlationData = new CorrelationData(msgId);
                        Thread.sleep(1000);
                        rabbitTemplate.convertAndSend(RabbitConfig.MAIL_EXCHANGE_NAME, RabbitConfig.MAIL_ROUTING_KEY_NAME, JSON.toJSONString(mailTemplate), correlationData);// 发送消息
                    }
                }
            }
            RabbitConfig.ENABLE_SCHEDULED = true;
        } catch (Exception e) {
            System.out.println("错误： " + e);
        }
    }
}

消费者

@Component
@Slf4j
public class MailConsumer {

    @Autowired
    private IMsgLogService iMsgLogService;

    @RabbitListener(queues = RabbitConfig.MAIL_QUEUE_NAME)
    public void consume(Message message, Channel channel) throws IOException {
        String msg = new String(message.getBody());
        msg = msg.replaceAll("\\\\", "");
        msg = msg.substring(1, msg.length() - 1);
        MailTemplate mailTemplate = JSON.parseObject(msg, MailTemplate.class);
        log.info("收到消息: {}", mailTemplate.toString());

        String msgId = mailTemplate.getMsgId();
        QueryWrapper<MsgLog> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("msg_id", msgId);
        UpdateWrapper<MsgLog> updateWrapper = new UpdateWrapper<>();
        updateWrapper.eq("msg_id", msgId);
        MsgLog msgLog = iMsgLogService.getOne(queryWrapper);

        // 消费幂等性
        if (null == msgLog || msgLog.getStatus().equals(RabbitConfig.MAIL_CONSUMED_SUCCESS)) {
            log.info("重复消费, msgId: {}", msgId);
            return;
        }

        msgLog.setStatus(3);
        msgLog.setUpdateTime(LocalDateTime.now());
        iMsgLogService.update(msgLog, updateWrapper);

        MessageProperties properties = message.getMessageProperties();
        long tag = properties.getDeliveryTag();

        boolean success = new SendEmailUtil(mailTemplate, new ArrayList<>()).send();
        if (success) {
            msgLog.setStatus(RabbitConfig.MAIL_CONSUMED_SUCCESS);
            msgLog.setUpdateTime(LocalDateTime.now());
            iMsgLogService.update(msgLog, updateWrapper);
            log.info("消费成功！");
            channel.basicAck(tag, false);// 消费确认
        } else {
            channel.basicNack(tag, false, true);
        }
    }
}

重新发送

@Component
@Slf4j
public class ResendMsg {

    @Autowired
    private IMsgLogService iMsgLogService;

    @Autowired
    private RabbitTemplate rabbitTemplate;

    // 最大投递次数
    private static final int MAX_TRY_COUNT = 3;

    /**
     * 每30s拉取投递失败的消息, 重新投递
     */
    @Scheduled(cron = "0 0/1 * * * ?")
    public void resend() {
        log.info("开始执行定时任务(重新投递消息)");
        UpdateWrapper<MsgLog> updateWrapper = new UpdateWrapper<>();
        QueryWrapper<MsgLog> queryWrapper = new QueryWrapper<>();
        queryWrapper.ne("status", RabbitConfig.MAIL_DELIVER_FAIL).ne("status", RabbitConfig.MAIL_CONSUMED_SUCCESS);

        List<MsgLog> msgLogs = iMsgLogService.list(queryWrapper);
        if (msgLogs.size() == 0){
            RabbitConfig.ENABLE_SCHEDULED = false;
        }
        msgLogs.forEach(msgLog -> {
            String msgId = msgLog.getMsgId();
            updateWrapper.eq("msg_id", msgId);
            if (msgLog.getTryCount() >= MAX_TRY_COUNT) {
                msgLog.setStatus(RabbitConfig.MAIL_DELIVER_FAIL);
                msgLog.setUpdateTime(LocalDateTime.now());
                iMsgLogService.update(msgLog, updateWrapper);
                log.info("超过最大重试次数, 消息投递失败, msgId: {}", msgId);
            } else {
                msgLog.setTryCount(msgLog.getTryCount() + 1);
                msgLog.setUpdateTime(LocalDateTime.now());
                msgLog.setNextTryTime(LocalDateTime.now().plusSeconds(60));
                iMsgLogService.update(msgLog, updateWrapper);// 投递次数+1

                CorrelationData correlationData = new CorrelationData(msgId);
                rabbitTemplate.convertAndSend(msgLog.getExchange(), msgLog.getRoutingKey(), msgLog.getMsg(), correlationData);// 重新投递
                log.info("第 " + (msgLog.getTryCount() + 1) + " 次重新投递消息");
            }
        });
        log.info("定时任务执行结束(重新投递消息)");
    }

}