iOS版本13.6不会使用默认邮件应用程序打开Mime附件

问题描述

我试图从简单的JavaMail应用程序发送邮件，但是当我尝试在IOS默认邮件应用程序中打开它时，它没有打开（剪辑出现了，但是单击时什么也没有发生）。但是，当我直接从Outlook发送带有附件的电子邮件时，可以将其打开。可能会丢失要打开的特殊标题，或者有其他发送附件的方式吗？

这是我的代码：

import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

public class MailTest {
    
    public static void main(String[] args) throws Exception {

        Properties props = new Properties();
        props.put("mail.smtp.host","smtp.gmail.com");
        props.put("mail.smtp.port","587"); 
        props.put("mail.smtp.auth","true");
        props.put("mail.smtp.starttls.enable","true");
        
        Authenticator auth = new Authenticator() {
            @Override protected PasswordAuthentication getpasswordAuthentication() {
                return new PasswordAuthentication(MailConstants.AUTH_EMAIL,MailConstants.AUTH_PASSWORD);
            }
        };

        Session session = Session.getInstance(props,auth);

        sendEmailWithAttachment(session);

    }

    private static void sendEmailWithAttachment(Session session) throws MessagingException,IOException {
        
        MimeMessage msg = new MimeMessage(session);
        msg.addHeader("Content-type","text/HTML; charset=UTF-8");
        msg.addHeader("format","flowed");
        msg.addHeader("Content-transfer-encoding","8bit");

        msg.setFrom(new InternetAddress("[email protected]","noreply-JD"));
        msg.setReplyTo(InternetAddress.parse("[email protected]",false));
        msg.setSubject(MailConstants.SUBJECT_MAIL,"UTF-8");
        msg.setContent(createContent());
        msg.setSentDate(new Date());
        msg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(MailConstants.RECIPIENT_MAIL,false));
           
        System.out.println("Preparing to send mail...");
        
        Transport.send(msg);
        
        System.out.println("Mail sent to " + MailConstants.RECIPIENT_MAIL);
        
    }
    
    private static MimeMultipart createContent() throws MessagingException,IOException {
        MimeMultipart multipart = new MimeMultipart("related");
        multipart.addBodyPart(createTextPart("some test only...",StandardCharsets.UTF_8.name()));
        multipart.addBodyPart(createAttachmentPart(new File("documentation.pdf"),StandardCharsets.UTF_8.name()));
        return multipart;
    }
    
    private static MimeBodyPart createTextPart(String text,String charset) throws MessagingException {
        MimeBodyPart mimeBodyPart = new MimeBodyPart();
        mimeBodyPart.setContent(text,"text/html; charset=" + charset);
        return mimeBodyPart;
    }
    
    private static MimeBodyPart createAttachmentPart(File file,String charset) throws MessagingException,IOException {
        MimeBodyPart attachmentPart = new MimeBodyPart();
        DataSource dataSource = new FileDataSource(file);
        attachmentPart.setDataHandler(new DataHandler(dataSource)); 
        attachmentPart.setFileName(MimeUtility.encodeText(dataSource.getName(),charset,null));
        return attachmentPart;
    }
    
}

解决方法

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