21、SpringBoot 异步任务，定时任务，邮件任务

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

spring:
  rabbitmq:
    host: 8.129.215.115
    username: rabbit
    password: 123456
    port: 5672
  mail:
    username: 1635290773@qq.com
    password: mcdtoungbetubbhi
    host: smtp.qq.com
    properties:
      mail.smtp.ssl.enable: true

    @Autowired
    JavaMailSenderImpl mailSender;

    @Test
    public void send01() {
        SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
        simpleMailMessage.setSubject("我要辞职");
        simpleMailMessage.setText("六月要辞职");
        simpleMailMessage.setFrom("1635290773@qq.com");
        simpleMailMessage.setTo("shun2302768@163.com");
        mailSender.send(simpleMailMessage);
    }

    @Autowired
    JavaMailSenderImpl mailSender;

    @Test
    public void send02() throws Exception {
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
        helper.setSubject("我是大帅哥");
        helper.setText("我很帅气");
        helper.setFrom("1635290773@qq.com");
        helper.setTo("shun2302768@163.com");
        helper.addAttachment("1.jpg",new File("C:\\Users\\edwin\\Desktop\\图片\\1.jpg"));
        helper.addAttachment("2.jpg",new File("C:\\Users\\edwin\\Desktop\\图片\\2.jpg"));
        mailSender.send(mimeMessage);
    }