我尝试发送一封带有附件(PDF文件)的电子邮件,但接收者收到的文件名称不同,并且没有.pdf结尾。该文件名称为希腊语。
try {
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress("from@mail.com"));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(mail));
message.setSubject(title,"utf-8");
// Create the message part
BodyPart messageBodyPart = new MimeBodyPart();
// Now set the actual message
messageBodyPart.setText("This is message body");
// Create a multipar message
Multipart multipart = new MimeMultipart();
// Set text message part
multipart.addBodyPart(messageBodyPart);
// Part two is attachment
messageBodyPart = new MimeBodyPart();
String filename = "file.pdf";
String f = name + " Πρόγραμμα Ιανουάριος 2016.pdf"; // the desired name of the file
DataSource source = new FileDataSource(filename);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(MimeUtility.encodeText(f, "UTF-8", null));
multipart.addBodyPart(messageBodyPart);
// Send the complete message parts
message.setContent(multipart);
Transport.send(message);
System.out.println("Mail " + mail +" sent");
} catch (MessagingException e) {
throw new RuntimeException(e);
}
name
是一个字符串变量,之前已经赋值。奇怪的是,如果我有String f = name + " αααα.pdf"
,接收方会成功地得到一个名为Ρουβάς αααα.pdf
的pdf文件,但是如果我有这个字符串f = name + " Πρόγραμμα Ιανουάριος 2016.pdf";
他就不行了。他得到的东西类似于=_UTF-8_B_zpzOtc Dz4POsc67zrHPgiDOmc6xzr3Ov8 FzqzPgc65zr_Pgi___ ___filename_1=__5wZGY=_=
我添加了message.writeTo(System.out);
,并得到了:
MIME-Version: 1.0
Content-Type: multipart/mixed;
bou
ndary="----=_Part_0_1825884453.1457025565509"
------=_Part_0_1825884453.1457025565509
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
This is message body
------=_Part_0_1825884453.1457025565509
Content-Type: application/octet-stream;
name*0="=?UTF-8?B?zpzOtc+Dz4POsc67zrHPgiDOmc6xzr3Ov8+FzrHPgc6vzr/Pgi";
name*1="Ay?=
=?UTF-8?B?MDE2zpnOsc69zr/Phc6sz4HOuc6/z4IgMjAxNi5wZGY=?";
name*2="="
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename*0="=?UTF-8?B?zpzOtc+Dz4POsc67zrHPgiDOmc6xzr3Ov8+FzrHPgc6vzr/Pgi";
filename*1="Ay?=
=?UTF-8?B?MDE2zpnOsc69zr/Phc6sz4HOuc6/z4IgMjAxNi5wZGY=?";
filename*2="="
使用 props.setProperty("mail.mime.encodeparameters", "false");
或 true
。
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_Part_0_797681969.1457074816557"
------=_Part_0_797681969.1457074816557
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
This is message body
------=_Part_0_797681969.1457074816557
Content-Type: application/octet-stream; name="?????????? 2016.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename*=Cp1252''%3F%3F%3F%3F%3F%3F%3F%3F%3F%3F%202016.pdf
message.writeTo(System.out);
,那么消息头看起来像什么?用于读取和显示接收到的消息的是哪个程序? - Bill ShannonJavaMail 1.5.5
。接收者得到的文件没有文件扩展名,所以如果你添加.pdf
,你将可以正常打开它。 - yaylitzismessage.writeTo(System.out);
的输出添加到了 @BillShannon 的问题中。 - yaylitzis