spring boot 邮件服务

引入依赖

添加spring-boot-starter-mail包引用

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

配置文件

spring:
  mail:
    host: smtp.163.com
    username: 用户名
    password: 密码
    properties:
      mail:
        smtp:
          auth: true
          starttls:
            enable: true
            required: true

注意：若使用QQ邮箱发送邮件，则需要修改为spring.mail.host=smtp.qq.com，同时spring.mail.password改为QQ邮箱的授权码。 
QQ邮箱->设置->账户->POP3/SMTP服务:开启服务后会获得QQ的授权码

发送纯文本的简单邮件

    private final Logger logger = LoggerFactory.getLogger(this.getClass());

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

    /**
     * 发送纯文本的简单邮件
     * @param to
     * @param subject
     * @param content
     */
    public void sendSimpleMail(String to, String subject, String content){
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(from);
        message.setTo(to);
        message.setSubject(subject);
        message.setText(content);

        try {
            sender.send(message);
            logger.info("简单邮件已经发送。");
        } catch (Exception e) {
            logger.error("发送简单邮件时发生异常！", e);
        }
    }

发送html格式的邮件

     /**
     * 发送html格式的邮件
     * @param to
     * @param subject
     * @param content
     */
    public void sendHtmlMail(String to, String subject, String content){
        MimeMessage message = sender.createMimeMessage();

        try {
            //true表示需要创建一个multipart message
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);

            sender.send(message);
            logger.info("html邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送html邮件时发生异常！", e);
        }
    }

发送带附件的邮件

     /**
     * 发送带附件的邮件
     * @param to
     * @param subject
     * @param content
     * @param filePath
     */
    public void sendAttachmentsMail(String to, String subject, String content, String filePath){
        MimeMessage message = sender.createMimeMessage();

        try {
            //true表示需要创建一个multipart message
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);

            FileSystemResource file = new FileSystemResource(new File(filePath));
            String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
            helper.addAttachment(fileName, file);
            //helper.addAttachment(fileName2, file2);   添加多个附件
            sender.send(message);
            logger.info("带附件的邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送带附件的邮件时发生异常！", e);
        }
    }

发送嵌入静态资源的邮件

     /**
     * 发送嵌入静态资源（一般是图片）的邮件
     * @param to
     * @param subject
     * @param content 邮件内容，需要包括一个静态资源的id，比如：<img src=\"cid:rscId01\" >
     * @param rscPath 静态资源路径和文件名
     * @param rscId 静态资源id
     */
    public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId){
        MimeMessage message = sender.createMimeMessage();

        try {
            //true表示需要创建一个multipart message
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);

            FileSystemResource res = new FileSystemResource(new File(rscPath));
            helper.addInline(rscId, res);

            sender.send(message);
            logger.info("嵌入静态资源的邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送嵌入静态资源的邮件时发生异常！", e);
        }
    }

编写测试

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

    @Autowired
    private MailService mailService;

    private String to = "xiewei@anosi.cn";

    @Test
    public void sendSimpleMail() {
        mailService.sendSimpleMail(to, "主题：简单邮件", "测试邮件内容");
    }

    @Test
    public void sendHtmlMail() {
        String content="<html>\n" +
                "<body>\n" +
                "    <h3>hello world ! 这是一封Html邮件!</h3>\n" +
                "</body>\n" +
                "</html>";
        mailService.sendHtmlMail(to, "主题：html邮件", content);
    }

    @Test
    public void sendAttachmentsMail() {
        mailService.sendAttachmentsMail(to, "主题：带附件的邮件", "有附件，请查收！", "E:\\1.jpg");
    }

    @Test
    public void sendInlineResourceMail() {
        String rscId = "rscId001";
        mailService.sendInlineResourceMail(to,
                "主题：嵌入静态资源的邮件",
                "<html><body>这是有嵌入静态资源：<img src=\'cid:" + rscId + "\' ></body></html>",
                "E:\\1.jpg",
                rscId);
    }

}

效果截图

项目参考地址

https://github.com/ithobart/Spring-Boot-Examples