1.首先配置QQ邮箱---设置---账户---开启服务POP3/SMTP开启---获取授权码

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2.在pom.xml中添加依赖

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

3.在application.properties中配置

spring.mail.host=smtp.qq.com
spring.mail.username=824772535@qq.com   //自己的邮箱地址
spring.mail.password=fvbiwufrqsfbbcbc   //开启时获取的授权码
spring.mail.default-encoding=UTF-8


##如果不加下面3句,会报530错误
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

4.写service接口

public interface MailService {
    /**
     * 发送简单邮件
     */
    void sendMail(String to,String subject,String content);

}

5.实现类接口

@Service("mailService")
public class MailServiceImpl implements MailService {
    @Autowired
    private JavaMailSender mailSender;

    @Override
    public void sendMail(String to, String subject, String content) {
        SimpleMailMessage mailMessage=new SimpleMailMessage();
        mailMessage.setFrom("824772535@qq.com");//发起者
        mailMessage.setTo("16422802@qq.com");//接受者
        mailMessage.setSubject("朱芮林");//标题
        mailMessage.setText("abcdefghijklmnopqrstuvwxyz 9:50发送");//发送的邮件内容
        try {
            mailSender.send(mailMessage);
            System.out.println("发送简单邮件");
        }catch (Exception e){
            System.out.println("发送简单邮件失败");
        }
    }

}

6.定时任务

@Service
//@Async
public class TaskService {
   @Autowired
   private MailService mailService;

   @Scheduled(cron = "0 15 10 ? * MON") //corn表达式:定时为每周一早上9:50发送，可更换
   public void proces(){
       mailService.sendMail("16422802@qq.com","张文旭","dsf");
       System.out.println("发送成功");
   }
}