发送邮件功能：使用Spring Email、邮件工具类、使用Thymeleaf模板引擎 发送html邮件

开启自己邮箱的POP3/SMTP服务

导入spring mail 依赖

    org.springframework.boot
    spring-boot-starter-mail
    2.6.3

#MailProperties
spring.mail.host=smtp.sina.com //新浪   对应邮件服务厂家域名  QQ --- smtp.qq.com
spring.mail.port=465
spring.mail.username=xxxxxxxxxxxx
spring.mail.password=xxxxxxxxxxx //若出现连接错误，可替换为 认证码，去服务厂家获取
#ssl安全连接
spring.mail.properties.mail.smtp.ssl.enable=true

@Component
public class MailClient {
    public static final Logger logger = LoggerFactory.getLogger(MailClient.class);

    @Resource
    private JavaMailSender mailSender;

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

    
    public void sendMail(String to, String subject, String content) {
        try {
            // 构建邮件
            MimeMessage message = mailSender.createMimeMessage();

            //使用邮件助手构建邮件内容
            MimeMessageHelper helper = new MimeMessageHelper(message);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);//true代表可发送html格式

            //发送邮件
            mailSender.send(helper.getMimeMessage());

        } catch (MessagingException e) {
            logger.error("发送邮件失败" + e.getMessage());
        }
    }
}

@SpringBootTest
public class MailTest {

    @Autowired
    private MailClient mailClient;

    
    @Resource
    private TemplateEngine templateEngine;

    @Test
    public void testTextMail(){
        mailClient.sendMail("xxxxxxx@qq.com", "TEST", "你好啊！");
    }

    @Test
    public void testHtmlMail() {
        //向html中传入数据
        Context context = new Context();
        context.setVariable("username", "sunday");

        //构建邮件内容
        String content = templateEngine.process("/mail/demo", context);
        System.out.println(content);

        //发送邮件
        mailClient.sendMail("xxxxxxx@qq.com", "html邮件", content);

    }

}

    
    


  
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