Springboot实现发送邮件

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

spring.mail.host=smtp.163.com
spring.mail.username=XXX@163.com
spring.mail.passWord=XXX
spring.mail.default-encoding=utf-8

SimpleMailMessage message = new SimpleMailMessage();

@Autowired
private JavaMailSender mailSender;
//使用JavaMailSender发送邮件
mailSender.send(message);

@Service
public class MailService {

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

    @Autowired
    private JavaMailSender mailSender;

    
     public void sendSimpleMail(String to,String subject,String content) {
         SimpleMailMessage message = new SimpleMailMessage();
         //接收方
         message.setTo(to);
         //发送邮件的主题
         message.setSubject(subject);
         //发送邮件内容
         message.setText(content);
         //发送人
         message.setFrom(sendPeople);
         //使用JavaMailSender发送邮件
         mailSender.send(message);

     }

}

package com.yzy.restaurant.mapper;

import com.yzy.restaurant.MailService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class MailTest {

    @Autowired
    private MailService mailService;


    @Test
    public void sendSimpleMailTest() {
        mailService.sendSimpleMail("yzy20162362@163.com","这是一个简单的demo","哈哈哈，发送成功了！");
    }
}

     public void sendMailhtml(String to,String subject,String content) throws MessagingException {
         MimeMessage message = mailSender.createMimeMessage();
         MimeMessageHelper helper = new MimeMessageHelper(message,true);
         helper.setTo(to);
         helper.setSubject(subject);
         helper.setText(content,true);
         helper.setFrom(sendPeople);
         mailSender.send(message);
     }

     public void sendMailHtml(String to,String subject,String content) throws MessagingException {
         MimeMessage message = mailSender.createMimeMessage();
         MimeMessageHelper helper = new MimeMessageHelper(message,true);
         helper.setTo(to);
         helper.setSubject(subject);
         helper.setText(content,true);
         helper.setFrom(sendPeople);
         mailSender.send(message);
     }

  
     public void sendAttachmentsMail(String to,String subject,String content,String filePath) throws MessagingException {
         MimeMessage message = mailSender.createMimeMessage();
         MimeMessageHelper helper = new MimeMessageHelper(message,true);
         helper.setTo(to);
         helper.setSubject(subject);
         helper.setText(content,true);
         helper.setFrom(sendPeople);

         //读取
         FileSystemResource file = new FileSystemResource(new File(filePath));
         //获取文件名
         String filename = file.getFilename();
         //设置附件
         helper.addAttachment(filename,file);
         //发送
         mailSender.send(message);

     }

 @Test
    public void sendAttachmentsMailTest() throws MessagingException {
        String filePath = "D:/玖佳智能 2020年3月第3周周工作汇总（3月16-3月20日)(1).xlsx";
        mailService.sendAttachmentsMail("yzy20162362@163.com","这是一封附件邮件","哈哈哈，附件邮件发送成功了",filePath);
    }

    public void sendPhotoMail(String to,String subject,String content,String rscPath, String rscId) throws MessagingException {
        MimeMessage message = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message,true);
        helper.setTo(to);
        helper.setSubject(subject);
        helper.setText(content,true);
        helper.setFrom(sendPeople);

        //读取
        FileSystemResource rec = new FileSystemResource(new File(rscPath));
        helper.addInline(rscId,rec);
        //发送
        mailSender.send(message);


}

@Test
    public void sendPhotoMailTest () throws MessagingException {
        String imgPath = "C:\\Users\\yzy\\Desktop\\微信图片_20210917201828.jpg";
        String rsc = "0001";
        mailService.sendPhotoMail("yzy20162362@163.com","这是一封图片邮件","哈哈哈，图片邮件发送成功了",imgPath,rsc);
    }

<!DOCTYPE html>
<html lang="en" xmlns:th="Http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>邮件模板</title>
</head>
<body>
    你好，感谢您的注册，这是一封验证邮件，请点击下面的连接完成注册，感谢您的支持！<br>
    <a rel="#" th:href="@{https://mail.163.com}" rel="external nofollow" >激活账户</a>>
</body>
</html>

@Test
    public void sendTemplateMailTest () throws MessagingException {
        Context content = new Context();
        content.setVariable("id","111");
        String emailContent = templateEngine.process("emailTemplate", content);
        mailService.sendMailHtml("yzy20162362@163.com","这是一封模板邮件",emailContent);
    }