javax.mail

依赖__javax.mail + mq

<!--javax.mail-->
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.7</version>
        </dependency>
<!--activeMQ-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-activemq</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.activemq</groupId>
            <artifactId>activemq-pool</artifactId>
        </dependency>

application.properties

#ActiveMQ
spring.activemq.broker-url=tcp://localhost:61616

场景：

用户注册时，需要给用户发送邮件，采用ActiveMQ作为消息中间件

Controller 中的 Producer

//注入JmsTemplate
@Autowired
    private JmsTemplate jmsTemplate;

 @RequestMapping("/register")
    public String register(HttpServletRequest request) throws MessagingException {
        String userName = request.getParameter("username");
        String passWord = request.getParameter("password");
        String email = request.getParameter("email");
        User user = new User();
        user.setUserName(userName);
        user.setPassWord(passWord);
        user.setEmail(email);
        user.setState("0");
        user.setCreateTime(new Date());
        userService.addUser(user);
       // MailUtils.sendMail(email,"欢迎您成为我们的会员");
        /**
         * MQ
         */
        jmsTemplate.send("mail_lp", new MessageCreator() {
            @Override
            public Message createMessage(Session session) throws JMSException {
                MapMessage message = session.createMapMessage();
                message.setString("title","注册邮件");
                message.setString("email",email);
                return message;
            }
        });
        return "/success";
    }

Consumer

消费类上必须有 @Component 或者@Service 注解，这样Consumer才会委派给Listener.

@Component
public class Consumer {
    @JmsListener(destination = "mail_lp")
    public void sendMail(Message message) throws JMSException, MessagingException {
        MapMessage mm = (MapMessage) message;
        String title = mm.getString("title");
        String email = mm.getString("email");
        MailUtils.sendMail(email,title);
    }
}

MailUtils

public class MailUtils {

    public static void sendMail(String email, String emailMsg)
            throws AddressException, MessagingException {
        // 1.创建一个程序与邮件服务器会话对象 Session

        Properties props = new Properties();
        props.setProperty("mail.transport.protocol", "SMTP");
        props.setProperty("mail.host", "smtp.126.com");
        props.setProperty("mail.smtp.auth", "true");// 指定验证为true

        // 创建验证器
        Authenticator auth = new Authenticator() {
            public PasswordAuthentication getPasswordAuthentication() {
             //return new PasswordAuthentication("CalistaAngel", "lp123456");给你们用我的问题也不大毕竟我不是那么小气的人哈哈哈哈哈
                return new PasswordAuthentication("邮箱名", "授权码");
            }
        };

        Session session = Session.getInstance(props, auth);

        // 2.创建一个Message，它相当于是邮件内容
        Message message = new MimeMessage(session);

        message.setFrom(new InternetAddress("CalistaAngel@126.com")); // 设置发送者

        message.setRecipient(RecipientType.TO, new InternetAddress(email)); // 设置发送方式与接收者

        message.setSubject("用户注册");
        // message.setText("这是一封激活邮件，请<a href='#'>点击</a>");

        message.setContent(emailMsg, "text/html;charset=utf-8");

        // 3.创建 Transport用于将邮件发送

        Transport.send(message);
    }
}

mq

Email