看起来像JavaMail';s MimeBodyPart.setFileName在电子邮件中插入换行符,并导致文件名显示为无效
我们有代码,可以发送到一个人的邮箱,并将带有附件的电子邮件复制到文件系统 用于复制消息和附件的代码对于大多数文件都可以正常工作,但长文件名存在问题看起来像JavaMail';s MimeBodyPart.setFileName在电子邮件中插入换行符,并导致文件名显示为无效,java,jakarta-mail,Java,Jakarta Mail,我们有代码,可以发送到一个人的邮箱,并将带有附件的电子邮件复制到文件系统 用于复制消息和附件的代码对于大多数文件都可以正常工作,但长文件名存在问题 if (attachment instanceof FileAttachment || attachment.getIsInline()) { System.out.println(attachment.getName()); String FILE_NAME = "C:path\\" + attachment.getName();
if (attachment instanceof FileAttachment || attachment.getIsInline()) {
System.out.println(attachment.getName());
String FILE_NAME = "C:path\\" + attachment.getName();
attachment.load(FILE_NAME);
MimeBodyPart attachmentMime = new MimeBodyPart();
attachmentMime.setContent(new MimeMultipart(attachment.getContentType()));
javax.activation.DataSource source = new FileDataSource(FILE_NAME);
attachmentMime.setDataHandler(new DataHandler(source));
attachmentMime.setFileName(attachment.getName());
multipart.addBodyPart(attachmentMime);
}
例如,文件名“CRLM population.xlsx的SKI17042手术CPT选择副本”显示在名为“Untitled attachment 00006.dat”的电子邮件附件中。当我查看创建的.EML文件时,它看起来像JavaMail插入文件名中间的换行符,这可能引起问题。
在文本编辑器中打开.eml时,我会看到带有换行符的标题(请注意,跨文件名的第3/4行和第7/8行中的换行符:
------=_Part_3_840180718.1542390637623
Content-Type: application/octet-stream;
name*0="Copy of SKI17042 surgery CPT choices for CRLM
population.xls"; name*1=x
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename*0="Copy of SKI17042 surgery CPT choices for CRLM
population.xls"; filename*1=x
文件内容很好,如果您获取文件并使用.xlsx,它将在Excel中以预期的内容打开
有没有人对如何解决JavaMail中的文件附件名问题有任何信息或想法
谢谢
编辑-解决方案
Properties props = System.getProperties();
props.put("mail.mime.splitlongparameters", false);
Session session = Session.getInstance(props, null);
createProjectFolder(folder);
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(objectJSON.getString("from"), objectJSON.getString("fromName")));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(objectJSON.getString("to")));
message.setRecipients(Message.RecipientType.CC, InternetAddress.parse(objectJSON.getString("cc")));
message.setSubject(objectJSON.getString("subject"));
message.setSentDate(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss a").parse(objectJSON.getString("date")));
// create the message part
Multipart multipart = new MimeMultipart("mixed");
MimeBodyPart content = new MimeBodyPart();
// fill message
if (objectJSON.getString("body").toLowerCase().contains("html")) {
content.setContent( objectJSON.getString("body"), "text/html; charset=utf-8" );
}
else {
content.setText(objectJSON.getString("body"), "utf-8");
}
multipart.addBodyPart(content);
if (objectJSON.getInt("hasAttachment") == 1) {
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
service.setUrl(new URI("https://mail/ews/Exchange.asmx"));
ExchangeCredentials credentials = new WebCredentials(developerEmail, password);
service.setCredentials(credentials);
try {
EmailMessage messageWithAttachment = EmailMessage.bind(service, new ItemId(emailId));
AttachmentCollection attachmentsCol = messageWithAttachment.getAttachments();
System.out.println("attachments: " + attachmentsCol.getCount());
for (int i = 0; i < attachmentsCol.getCount(); i++) {
FileAttachment attachment = (FileAttachment)attachmentsCol.getPropertyAtIndex(i);
if (attachment instanceof FileAttachment || attachment.getIsInline()) {
System.out.println(attachment.getName());
String FILE_NAME = "C:\\R2D4\\eclipse-workspace\\DataLine\\WebContent\\WEB-INF\\email_attachments\\" + attachment.getName();
attachment.load(FILE_NAME);
MimeBodyPart attachmentMime = new MimeBodyPart();
attachmentMime.setContent(new MimeMultipart(attachment.getContentType()));
javax.activation.DataSource source = new FileDataSource(FILE_NAME);
attachmentMime.setDataHandler(new DataHandler(source));
attachmentMime.setFileName(attachment.getName());
multipart.addBodyPart(attachmentMime);
}
}
}
catch(Exception e) {
e.printStackTrace();
}
service.close();
}
// integration
message.setContent(multipart);
message.saveChanges();
Properties-props=System.getProperties();
props.put(“mail.mime.splitlongparameters”,false);
Session Session=Session.getInstance(props,null);
createProjectFolder(文件夹);
Message Message=新的mimessage(会话);
message.setFrom(新的InternetAddress(objectJSON.getString(“from”)、objectJSON.getString(“fromName”));
message.setRecipients(message.RecipientType.TO,InternetAddress.parse(objectJSON.getString(“TO”));
message.setRecipients(message.RecipientType.CC,InternetAddress.parse(objectJSON.getString(“CC”));
message.setSubject(objectJSON.getString(“subject”);
message.setEntDate(新的SimpleDataFormat(“yyyy-MM-dd hh:MM:ss a”).parse(objectJSON.getString(“date”));
//创建消息部分
Multipart Multipart=新的mimemmultipart(“混合”);
MimeBodyPart内容=新的MimeBodyPart();
//填充消息
if(objectJSON.getString(“body”).toLowerCase()包含(“html”)){
setContent(objectJSON.getString(“body”),“text/html;charset=utf-8”);
}
否则{
content.setText(objectJSON.getString(“body”),“utf-8”);
}
multipart.addBodyPart(内容);
if(objectJSON.getInt(“hasAttachment”)==1){
ExchangeService服务=新的ExchangeService(ExchangeVersion.Exchange2010_SP2);
service.setUrl(新URI(“https://mail/ews/Exchange.asmx"));
ExchangeCredentials credentials=新的WebCredentials(developerMail,密码);
服务。设置凭据(凭据);
试一试{
EmailMessageWithAttachment=EmailMessage.bind(服务,新项目ID(emailId));
AttachmentCollection attachmentsCol=messageWithAttachment.getAttachments();
System.out.println(“附件:+attachmentsCol.getCount());
对于(inti=0;i
如果文件名长度大于60个字符,则将按照中所述在多个参数中拆分文件名
处理消息的代码似乎不了解如何处理RFC 2231编码的参数。以下是可能的解决方案:
- 通过将属性设置为
,可以禁用所有RFC 2231编码的使用false
- 通过将属性
设置为mail.mime.splitlongparameters
,可以禁用长参数的拆分false