1.邮箱设置

开启SMTP服务并保存
开启SMTP服务

2. Spring Email

2.1导入Jar包

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
            <version>2.2.2.RELEASE</version>
</dependency>

2.2邮箱参数配置

#MailProperties
spring.mail.host=smtp.sina.com
spring.mail.port=465
spring.mail.username=niukexiangmu@sina.com
spring.mail.password=asdfasdfasdasd
spring.mail.protocol=smtps
#采用ssl安全连接
spring.mail.properties.mail.stmp.ssl.enable = true

2.3使用JavaMailSender发送邮件

@Component
public class MailClient {

    private static final Logger logger = LoggerFactory.getLogger(MailClient.class);

    @Autowired
    private JavaMailSender mailSender;

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

    public void sendMail(String to, String subject, String content) {
        try {
            //这里的message相当于一个邮件模板，但是是空的，需要helper去添加信息
            MimeMessage message = mailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(message);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);
            mailSender.send(helper.getMimeMessage());
        } catch (MessagingException e) {
            logger.error("发送邮件失败" + e.getMessage());
        }

    }

}

3.Thymeleaf模板引擎

template中创建demo.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>邮件实例</title>
</head>
<body>
    <p>欢迎你,<span style="color:red;" th:text="${username}"></span></p>
</body>
</html>
@Test
    public void testHtmlMail(){
        Context context = new Context();
        context.setVariable("username","heihei");
        //使用上文创建的模板引擎
        String content = templateEngine.process("/mail/demo",context);
        System.out.println(content);

        mailClient.sendMail("1009156204@qq.com","html",content);
    }