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

spring.mail.host=smtp.qq.com 
spring.mail.username=用戶名 //發(fā)送方的郵箱
spring.mail.password=密碼 //對(duì)于qq郵箱而言 密碼指的就是發(fā)送方的授權(quán)碼
spring.mail.properties.mail.smtp.auth=true 
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

@Service 
public class MailService { 
  private final Logger logger = LoggerFactory.getLogger(this.getClass()); 
  @Autowired 
  private JavaMailSender sender; 
  @Value("${spring.mail.username}") 
  private String from; 
  /** 
   * 發(fā)送純文本的簡(jiǎn)單郵件 
   * @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("簡(jiǎn)單郵件已經(jīng)發(fā)送。"); 
    } catch (Exception e) { 
      logger.error("發(fā)送簡(jiǎn)單郵件時(shí)發(fā)生異常！", e); 
    } 
  } 
  /** 
   * 發(fā)送html格式的郵件 
   * @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?jiǎng)?chuàng)建一個(gè)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郵件已經(jīng)發(fā)送。"); 
    } catch (MessagingException e) { 
      logger.error("發(fā)送html郵件時(shí)發(fā)生異常！", e); 
    } 
  } 
  /** 
   * 發(fā)送帶附件的郵件 
   * @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?jiǎng)?chuàng)建一個(gè)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); 
      sender.send(message); 
      logger.info("帶附件的郵件已經(jīng)發(fā)送。"); 
    } catch (MessagingException e) { 
      logger.error("發(fā)送帶附件的郵件時(shí)發(fā)生異常！", e); 
    } 
  } 
  /** 
   * 發(fā)送嵌入靜態(tài)資源（一般是圖片）的郵件 
   * @param to 
   * @param subject 
   * @param content 郵件內(nèi)容，需要包括一個(gè)靜態(tài)資源的id，比如：<img src=\"cid:rscId01\" > 
   * @param rscPath 靜態(tài)資源路徑和文件名 
   * @param rscId 靜態(tài)資源id 
   */ 
  public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId){ 
    MimeMessage message = sender.createMimeMessage(); 
    try { 
      //true表示需要?jiǎng)?chuàng)建一個(gè)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("嵌入靜態(tài)資源的郵件已經(jīng)發(fā)送。"); 
    } catch (MessagingException e) { 
      logger.error("發(fā)送嵌入靜態(tài)資源的郵件時(shí)發(fā)生異常！", e); 
    } 
  } 
}

public class MailTests extends BasicUtClass{ 
  @Autowired 
  private MailService mailService; 
  private String to = "xujijun@mail.cn"; 
  @Test 
  public void sendSimpleMail() { 
    mailService.sendSimpleMail(to, "主題：簡(jiǎn)單郵件", "測(cè)試郵件內(nèi)容"); 
  } 
}