SpringBoot uses JavaMailSender to send mail

1. First need to import pom dependencies

        <!--   引入emil模块     -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>

2. Configure application.properties

#邮件定时任务
spring.mail.username=****@sina.com
#密码是邮箱的授权码
spring.mail.password=授权码
#用的那哪类型的邮箱账号，就输入哪种的smtp服务器地址
spring.mail.host=smtp.sina.com
#有些邮箱需要这个，如qq邮箱
#spring.mail.properties.mail.smtp.ssl.enable=true

Configuration as shown in Figure

3, test code

@RestController
public class MailController {
    
    

    @Autowired
    JavaMailSender javaMailSender;

    @PublicInterface
    @RequestMapping("/test/saveMailSender")
    public void saveMailSender(){
    
    
        //发送简单的邮件
        SimpleMailMessage message = new SimpleMailMessage();
        message.setSubject("邮件标题");
        message.setText("邮件的具体内容");
        //发送给谁，可以发送多个邮箱账号
        message.setTo("****@qq.com");
        //谁发送的
        message.setFrom("****@sina.com");
        javaMailSender.send(message);
    }

    @PublicInterface
    @RequestMapping("/test/saveMailSenders")
    public void saveMailSenders() throws Exception{
    
    
        //发送复杂的邮件
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true);
        //设置邮箱内容
        helper.setSubject("邮件标题");
        //true开启html，b标签才会生效
        helper.setText("<b style='color:red'>邮件的具体内容</b>",true);
        //发送给谁，可以发送多个邮箱账号
        helper.setTo("****@qq.com");
        //谁发送的
        helper.setFrom("****@sina.com");
        //上传附件
        helper.addAttachment("1.png",new File("C:\\Users\\zhao\\Desktop\\1.png"));
        helper.addAttachment("2.png",new File("C:\\Users\\zhao\\Desktop\\2.png"));
        javaMailSender.send(mimeMessage);
    }

}