利用SpringBoot+RabbitMQ，实现一个邮件推送服务（二）

2021-07-26 15:56:56

四、邮箱授权码的获取

获取邮箱授权码的目的，主要是为了通过代码进行发送邮件，例如 QQ 邮箱授权码获取方式，如下图：

点击【开启】按钮，然后发送短信，即可获取授权码，该授权码就是配置文件spring.mail.password需要的密码！

利用SpringBoot+RabbitMQ，实现一个邮件推送服务（二）

五、项目介绍

springboot版本：2.1.5.RELEASE
RabbitMQ版本：3.6.5
SendMailUtil：发送邮件工具类
ProduceServiceImpl：生产者，发送消息
ConsumerMailService：消费者，消费消息，发送邮件

六、代码实现

6.1、创建项目

在 IDEA 下创建一个名称为smail的 Springboot 项目，pom文件中加入amqp和mail。

<dependencies>
    <!--spring boot核心-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <!--spring boot 测试-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <!--springmvc web-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!--开发环境调试-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>
    <!--mail 支持-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-mail</artifactId>
    </dependency>
    <!--amqp 支持-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-amqp</artifactId>
    </dependency>
    <!-- commons-lang3 -->
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>3.4</version>
    </dependency>
    <!--lombok-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.16.10</version>
    </dependency>
</dependencies>

6.2、配置rabbitMQ、mail

在application.properties文件中，配置amqp和mail！

#rabbitmq
spring.rabbitmq.host=192.168.0.103
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
# 开启confirms回调 P -> Exchange
spring.rabbitmq.publisher-confirms=true
# 开启returnedMessage回调 Exchange -> Queue
spring.rabbitmq.publisher-returns=true
# 设置手动确认(ack) Queue -> C
spring.rabbitmq.listener.simple.acknowledge-mode=manual
spring.rabbitmq.listener.simple.prefetch=100
# mail
spring.mail.default-encoding=UTF-8
spring.mail.host=smtp.qq.com
spring.mail.username=1370887518@qq.com
spring.mail.password=获取的邮箱授权码
spring.mail.from=1370887518@qq.com
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

其中，spring.mail.password第四步中获取的授权码，同时username和from要一致！

6.3、RabbitConfig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";
    @Autowired
    private CachingConnectionFactory 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");
            } 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);
    }
}

6.4、Mail 邮件实体类

@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
public class Mail {
    @Pattern(regexp = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$", message = "邮箱格式不正确")
    private String to;
    @NotBlank(message = "标题不能为空")
    private String title;
    @NotBlank(message = "正文不能为空")
    private String content;
    private String msgId;// 消息id
}

6.5、SendMailUtil邮件发送类

@Component
@Slf4j
public class SendMailUtil {
    @Value("${spring.mail.from}")
    private String from;
    @Autowired
    private JavaMailSender mailSender;
    /**
     * 发送简单邮件
     *
     * @param mail
     */
    public boolean send(Mail mail) {
        String to = mail.getTo();// 目标邮箱
        String title = mail.getTitle();// 邮件标题
        String content = mail.getContent();// 邮件正文
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(from);
        message.setTo(to);
        message.setSubject(title);
        message.setText(content);
        try {
            mailSender.send(message);
            log.info("邮件发送成功");
            return true;
        } catch (MailException e) {
            log.error("邮件发送失败, to: {}, title: {}", to, title, e);
            return false;
        }
    }
}

6.6、ProduceServiceImpl 生产者类

@Service
public class ProduceServiceImpl implements ProduceService {
    @Autowired
    private RabbitTemplate rabbitTemplate;
    @Override
    public boolean send(Mail mail) {
  //创建uuid
        String msgId = UUID.randomUUID().toString().replaceAll("-", "");
        mail.setMsgId(msgId);
  
  //发送消息到rabbitMQ
        CorrelationData correlationData = new CorrelationData(msgId);
        rabbitTemplate.convertAndSend(RabbitConfig.MAIL_EXCHANGE_NAME, RabbitConfig.MAIL_ROUTING_KEY_NAME, MessageHelper.objToMsg(mail), correlationData);
        return true;
    }
}

6.7、ConsumerMailService 消费者类

@Component
@Slf4j
public class ConsumerMailService {
    @Autowired
    private SendMailUtil sendMailUtil;
    @RabbitListener(queues = RabbitConfig.MAIL_QUEUE_NAME)
    public void consume(Message message, Channel channel) throws IOException {
        //将消息转化为对象
        String str = new String(message.getBody());
        Mail mail = JsonUtil.strToObj(str, Mail.class);
        log.info("收到消息: {}", mail.toString());
        MessageProperties properties = message.getMessageProperties();
        long tag = properties.getDeliveryTag();
        boolean success = sendMailUtil.send(mail);
        if (success) {
            channel.basicAck(tag, false);// 消费确认
        } else {
            channel.basicNack(tag, false, true);
        }
    }
}

6.8、TestController 控制层类

@RestController
@RequestMapping("/test")
@Slf4j
public class TestController {
    @Autowired
    private ProduceService testService;
    @PostMapping("send")
    public boolean sendMail(Mail mail) {
        return testService.send(mail);
    }
}

码农公寓

四、邮箱授权码的获取

五、项目介绍

六、代码实现

6.1、创建项目

6.2、配置rabbitMQ、mail

6.3、RabbitConfig配置类

6.4、Mail 邮件实体类

6.5、SendMailUtil邮件发送类

6.6、ProduceServiceImpl 生产者类

6.7、ConsumerMailService 消费者类

6.8、TestController 控制层类

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