以Excel作为附件的Java电子邮件中的UTF-8字符

Question

我正在开发一个遗留应用程序，在这个应用程序中，我必须在电子邮件正文和附件（Excel、xls文件）中发送一封带有特殊字符（utf-8）的电子邮件。

我在这方面做了很多尝试。特殊字符在附件xls文件中没有正确显示，但在电子邮件正文中显示正确。

我正在使用的代码片段如下所示。

    private void initalizeMailSession()
    {
        java.util.Properties props = new java.util.Properties();
        props.setProperty("mail.smtp.host", Properties.MAIL_SMTP_HOST);
        mailSession = Session.getInstance(props);
    }

    public void sendMailUtf8Attachment() throws Exception
    {
        // Send mail for current object

        if(mailSession==null)
            initalizeMailSession();
        MimeMessage mailMsg = new MimeMessage(mailSession);
        InternetAddress recipient=null;
        
        if(toList==null&&ccList==null&&bccList==null)
        {
            throw new Exception("No Recipents Found");
        }
        if(toList!=null)
        {
            for(String toAddress: toList)
            {
                recipient=new InternetAddress(toAddress);
                mailMsg.addRecipient(javax.mail.Message.RecipientType.TO, recipient);
            }
        }
        
        if(sender==null)
            throw new Exception("Sender not found");
        
        InternetAddress sender=new InternetAddress(this.sender);
        mailMsg.setFrom(sender);
        
        mailMsg.setSubject(subject);

        MimeMultipart mult = new MimeMultipart();
        
        MimeBodyPart messagePart = new MimeBodyPart();
        messagePart.setContent(mailMessage, mailType);  
        
        mult.addBodyPart(messagePart);

        MimeBodyPart filePart = new MimeBodyPart();
            
        filePart.setText(message, "UTF-8"); // message string is having html code with Chinese characters in it.
        filePart.setDisposition(MimeBodyPart.ATTACHMENT);
        filePart.setFileName("attachmen.xls");
        filePart.setHeader("Content-Transfer-Encoding", "base64");
        filePart.setHeader("Content-Type", HTML);
            
        mult.addBodyPart(filePart);


        mailMsg.setContent(mult);
        
        Transport.send(mailMsg);
        
        System.out.println("Mail send..");
    }

具有特殊字符的邮件正文：

请帮助我如何做到这一点，以正确显示附件中的特殊字符。

Answer 1

尝试此项目-