首先导入依赖

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


然后设置配置文件

我用的是qq邮箱

mail:
  default-encoding: UTF-8
  host: smtp.qq.com
  username: qq邮箱号
  password: 百度一下，qq邮箱设置里面哪个pop3的十六位字符串
  port: 587
  properties:
    mail:
      smtp:
        auth: true
        starttls:
          enable: true
          required: true


然后是后台设置


注入对象

@Resource
private JavaMailSender mailSender;

设置发送邮箱

@Value("${spring.mail.username}")
private String sendUser;

    public void sendEmailCode(String email) throws MessagingException {


            
            MimeMessage message = mailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(new InternetAddress(sendUser));
//email 是接收者邮箱
            helper.setTo(email);
            helper.setSubject("测试");
            helper.setText("测试成功",true);
            mailSender.send(message);


    }



不难用   就是网上资料不全   哪个配置文件搞了很久