是否可以使用Java Api获取邮件源数据[邮件未保存为文件]

Question

我可以使用Java Api获取邮件主题和正文内容。

但是在我的应用程序中，我收到了一封电子邮件中的模板，其中包含图像背后的网址。我需要获取该网址，当我手动查看该电子邮件的来源时，我发现该网址已显示。

请记住，我没有下载电子邮件，而是连接到邮件服务器，然后读取任何特定用户的邮件数据

有没有办法可以查看电子邮件来源，就像我收到邮件主题一样。

以下是代码：

    import org.jsoup.Jsoup;
    import javax.mail.*;
    import javax.mail.internet.MimeMessage;
    import java.io.IOException;
    import java.util.Properties;

    public class VerifyEmails {
     public Message message;
     public int i, n;
     public String result;
     public void check(String host, String user, String password) throws IOException, MessagingException {

      Properties properties = new Properties();
      properties.put("mail.imap.host", host);
      properties.put("mail.imap.user", user);
      properties.put("mail.imap.port", "143");
      properties.put("mail.imap.starttls.enable", "false");
      Session emailSession = Session.getDefaultInstance(properties);
      Store store = emailSession.getStore("imap");
      System.out.println("test1 " + store);
      store.connect(host, user, password);
      Folder emailFolder = store.getFolder("INBOX");
      emailFolder.open(Folder.READ_ONLY);
      Message[] messages = emailFolder.getMessages();
      System.out.println("messages.length---" + messages.length);
      for (i = 0, n = messages.length; i < n; i++) {
       message = messages[i];
       System.out.println("---------------------------------");
       System.out.println("Email Number " + (i + 1));
       System.out.println("Subject: " + message.getSubject());
       System.out.println("From: " + message.getFrom()[0]);
       System.out.println("Email contents are :" + message.getContentType());
       System.out.println("Email headers are :" + message.getContent());
      }

      if (message instanceof MimeMessage) {
       MimeMessage m = (MimeMessage) message;
       Object contentObject = message.getContent();
       if (contentObject instanceof Multipart) {
        BodyPart clearTextPart = null;
        BodyPart htmlTextPart = null;
        Multipart content = (Multipart) contentObject;

        int count = content.getCount();
        for (int i = 0; i < count; i++) {
         BodyPart part = content.getBodyPart(i);
         if (part.isMimeType("text/plain")) {
          clearTextPart = part;
          String test = String.valueOf(clearTextPart.getAllHeaders());

          System.out.println("check1" + test);
          break;
         } else if (part.isMimeType("text/html")) {

          htmlTextPart = part;
         }
        }
        if (clearTextPart != null) {
         result = (String) clearTextPart.getContent();
         String test = String.valueOf(clearTextPart.getAllHeaders());

         System.out.println("check2" + test);

         System.out.println("plain text: " + result);
        } else if (htmlTextPart != null) {
         String html = (String) htmlTextPart.getContent();
         result = Jsoup.parse(html).text();
         System.out.println("html text: " + result);
        }
       } else if (contentObject instanceof String) // a simple text message
       {
        result = (String) contentObject;
        System.out.println("String text: " + result);
       } else // not a mime message
       {
        result = null;
        System.out.println("null : " + result);
       }
       emailFolder.close(false);
       store.close();
      }
     }
}