JAVA MAIL API:无法将XLS文件附加到邮件

我下面的Java类必须使用java邮件复制文本文件内容并邮寄给收件人，以及附加的xls文件。

现在我可以阅读和邮寄文本文件内容，但无法附加 xls 文件。

以下是我的片段：

static void sendmail() throws IOException,     
MessagingException,AddressException,FileNotFoundException
   {
          DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy 
HH:mm:ss");
          Calendar cal = Calendar.getInstance();
            String to1=getOrderinfo.to1;
            String to2 = getOrderinfo.to2;
            String to3 = getOrderinfo.to3; 
            String to4 = getOrderinfo.to4;
            String from =getOrderinfo.from;
            String host = getOrderinfo.host;
            Properties properties = System.getProperties();
            properties.setProperty("mail.smtp.host", host);
            Session session = Session.getDefaultInstance(properties);
            MimeMessage message = new MimeMessage(session); 
             Multipart multipart = new MimeMultipart();

            String pathLogFile = "E:/car_failed_report/log.txt";
            try {
                    message.setFrom(new InternetAddress(from));   
                    message.addRecipient(Message.RecipientType.TO, new 
InternetAddress(to1));
                   message.setSubject(" CAR NOT YET INTEGRATED REPORT at 
: "+dateFormat.format(cal.getTime()));
                    StringBuffer sb = new StringBuffer();
                    FileInputStream fstream = new 
FileInputStream(pathLogFile);
                    BufferedReader br = new BufferedReader(new 
InputStreamReader(fstream));
                    String singleLine;
                    while ((singleLine = br.readLine()) != null) 
                    {
                        sb.append(singleLine + "<br>");
                       // CarParser1.sb1.append(singleLine +"<br>");
                    }
                    br.close();
                    String allLines;
                   allLines = sb.toString();

                    String allLines_html=" <html><head><title></title> 
</head>"
                            + "<body >"+allLines+"</body ></html>";
                  message.setContent(allLines_html, "text/html; 
charset=ISO-8859-1");
                 MimeBodyPart attachPart = new MimeBodyPart();
                File attachement = new File("E:\car_failed_report
\failed.xls");
                if (attachement.exists()) {
                    attachPart.attachFile(attachement);
                } else {
                    System.out.println("ERROR READING THE FILE");
                    throw new FileNotFoundException();
                }
                 Transport.send(message);

                System.out.println("Email Sent successfully....");

                System.out.println();
            } 
            catch(FileNotFoundException f1)
            {
                System.out.println("File not yet created..this is from 
mailer class");
                return;
            }
            catch (MessagingException mex) 
            {
                System.out.println("Invalid Email Address.please provide 
a valid email id to send with");
                mex.printStackTrace();

            }

任何人都可以帮我附加 xls 文件吗？

提前谢谢。

您使用附件创建了正文部分，但未将其添加到邮件中。替换以 message.setContent 开头的代码：

            MimeMultipart mp = new MimeMultipart();
            MimeBodyPart body = new MimeBodyPart();
            body.setText(allLines_html, "iso-8859-1", "html");
            mp.addBodyPart(body);
            MimeBodyPart attachPart = new MimeBodyPart();
            File attachement = new File("E:\car_failed_report\failed.xls");
            if (attachement.exists()) {
                attachPart.attachFile(attachement);
                mp.addBodyPart(attachPart);
            } else {
                System.out.println("ERROR READING THE FILE");
                throw new FileNotFoundException();
            }
            message.setContent(mp);

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