springboot实现自动邮件发送任务详解

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
    <version>2.5.2</version>
</dependency>

@SpringBootTest
class Sprintboot09TestApplicationTests {

    @Autowired
    JavaMailSenderImpl mailSender;
    @Test
    void contextLoads() {
        SimpleMailMessage mailMessage = new SimpleMailMessage();
        mailMessage.setSubject("你好呀");
        mailMessage.setText("谢谢你");
        mailMessage.setTo("2080038188@qq.com");
        mailMessage.setFrom("2080038188@qq.com");
        mailSender.send(mailMessage);
    }

}

@Test
void contextLoads2() throws MessagingException {
    //一个复杂的邮件
    MimeMessage mimeMessage = mailSender.createMimeMessage();
    //组装
    MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
    //正文
    helper.setSubject("小狂神你好呀~plus");
    helper.setText("<p style='color:red'>谢谢你的狂神说java系列课程~</P>",true);
    //附件
    helper.addAttachment("1.jpg",new File("C:\\Users\\86187\\Desktop\\1.jpg"));
    helper.setTo("2080038187@qq.com");
    helper.setFrom("2080038187@qq.com");
    mailSender.send(mimeMessage);
}