import java.io.File;
import java.util.Date;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;

/**

• 發送帶附件的郵件
  */
  public class AttachmentMailSender {

  public static boolean sendMail(MailSenderInfo mailInfo) {
  

  // 判斷是否需要身份認證
  MyAuthenticator authenticator = null;
  if (mailInfo.isValidate()) {
  // 如果需要身份認證，則創建一個密碼驗證器
  authenticator = new MyAuthenticator(mailInfo.getUserName(),
  mailInfo.getPassword());
  }
  // 根據郵件發送的屬性和密碼驗證器構造一個發送郵件的session
  Session sendMailSession = Session.getInstance(mailInfo
  .getProperties(), authenticator);
  try {
  
  // 根據session創建一個郵件消息
  Message mailMessage = new MimeMessage(sendMailSession);
  // 創建郵件發送者地址
  Address from = new InternetAddress(mailInfo.getFromAddress());
  // 設置郵件消息的發送者
  mailMessage.setFrom(from);
  // 創建郵件的接收者地址，並設置到郵件消息中
  Address to = new InternetAddress(mailInfo.getToAddress());
  mailMessage.setRecipient(Message.RecipientType.TO,to);
  // 設置郵件消息的主題
  mailMessage.setSubject(mailInfo.getSubject());
  // 設置郵件消息發送的時間
  mailMessage.setSentDate(new Date());

      // MiniMultipart類是一個容器類，包含MimeBodyPart類型的對象
      Multipart mainPart = new MimeMultipart();
      // 創建一個包含HTML內容的MimeBodyPart
      BodyPart html = new MimeBodyPart();
      // 設置HTML內容
      html.setContent(mailInfo.getContent(), "text/html; charset=GBK");
      mainPart.addBodyPart(html);
      // 為郵件添加附件
      String[] attachFileNames = mailInfo.getAttachFileNames();
      if (attachFileNames != null && attachFileNames.length > 0) {
          // 存放郵件附件的MimeBodyPart
          MimeBodyPart attachment = null;
          File file = null;
          for (int i = 0; i < attachFileNames.length; i++) {
              attachment = new MimeBodyPart();
              // 根據附件文件創建文件數據源
              file = new File(attachFileNames[i]);
              FileDataSource fds = new FileDataSource(file);
              attachment.setDataHandler(new DataHandler(fds));
              // 為附件設置文件名
              attachment.setFileName(MimeUtility.encodeWord(file.getName(), "GBK",
                      null));
              mainPart.addBodyPart(attachment);
          }
      }
      // 將MiniMultipart對象設置為郵件內容
      mailMessage.setContent(mainPart);
      // 發送郵件
      Transport.send(mailMessage);
      return true;
  
  } catch (Exception e) {
      e.printStackTrace();
      return false;
  }

  }

  public static void main(String[] args) {
  // 創建郵件信息
  // 創建郵件信息
  MailSenderInfo mailInfo = new MailSenderInfo();
  mailInfo.setMailServerHost("mail.XXX.com")//mail.qq.com 這個自己看類型百度查詢下，我們公司地址不透露啦
  mailInfo.setMailServerPort("25");
  mailInfo.setValidate(true);
  mailInfo.setUserName("用戶名");
  mailInfo.setPassword("密碼");
  mailInfo.setFromAddress("你的郵箱");
  mailInfo.setToAddress("收件郵箱");
  mailInfo.setSubject("MyMail測試");
  mailInfo.setContent("我的郵件測試\n\rMy test mail\n\r");
  //附件
  String[] fileNames = new String[3];
  fileNames[0] = "C:/temp/new.txt";
  fileNames[1] = "C:/temp/test.wav";
  fileNames[2] = "C:/temp/mary_photo.jpg";
  mailInfo.setAttachFileNames(fileNames);

  AttachmentMailSender.sendMail(mailInfo);

  }
  }

Java代碼實現發送郵件