通过 apache common java api 转发带有附件的电子邮件（使用 JavaMailApi 阅读）
Forward an email(read using JavaMailApi) with Attachments by apache common java api
我正在阅读来自 Outlook 网络邮件的邮件并获取邮件列表 ('javax.mail.Message')。现在我想使用 java 程序将这些消息转发到另一个电子邮件地址。
private void sendTestMail(String from, String subject, String sentDate, Object object, Message message)
throws EmailException, Exception {
MultiPartEmail email = new MultiPartEmail();
email.setHostName(forwardHost);
email.addTo(mailRecipients(to));
email.setFrom(emailFrom);
email.setSubject(subject);
email.setMsg("Testing email by sahil.");
EmailAttachment attachment = new EmailAttachment();
attachment.setPath("c:\sahil\test.jpg");
attachment.setDisposition(EmailAttachment.ATTACHMENT);
attachment.setDescription("Picture_of_John");
attachment.setName("John.jpg");
email.attach(attachment);
MimeMultipart multiPart = getMimeMultipart(message);
email.addPart(multiPart);
email.send();
}
如果我在上面的代码中的两行下面注释，那么它就可以正常工作。
MimeMultipart multiPart = getMimeMultipart(message);
email.addPart(multiPart);
但是这两行我遇到了异常。
2020-04-20 15:41:44,271 ERROR com.st.ict.ols.service.impl.ReplyToMessageServiceImpl [main] Inner Exception occurred while processing individual message. Error stacktrace is[org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtpapp1.sgp.st.com:25
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1421)
at org.apache.commons.mail.Email.send(Email.java:1448)
at com.st.ict.ols.service.impl.ReplyToMessageServiceImpl.sendTestMail(ReplyToMessageServiceImpl.java:342)
at com.st.ict.ols.service.impl.ReplyToMessageServiceImpl.processMessage(ReplyToMessageServiceImpl.java:167)
at com.st.ict.ols.service.impl.MessageServiceImpl.processMessage(MessageServiceImpl.java:22)
at com.st.ict.ols.OlsMailSenderApplication.run(OlsMailSenderApplication.java:36)
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:732)
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:716)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:703)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:304)
at com.st.ict.ols.OlsMailSenderApplication.main(OlsMailSenderApplication.java:27)
Caused by: javax.mail.MessagingException: IOException while sending message;
nested exception is:
java.io.IOException: Exception writing Multipart
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1308)
at javax.mail.Transport.send0(Transport.java:255)
at javax.mail.Transport.send(Transport.java:124)
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1411)
... 10 more
Caused by: java.io.IOException: Exception writing Multipart
at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:83)
at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:884)
at javax.activation.DataHandler.writeTo(DataHandler.java:317)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1652)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:961)
at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:553)
at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:81)
at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:884)
at javax.activation.DataHandler.writeTo(DataHandler.java:317)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1652)
at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1850)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1259)
... 13 more
Caused by: javax.mail.MessagingException: Empty multipart: multipart/mixed;
boundary="----=_Part_1_1176580790.1587377502798"
at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:548)
at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:81)
... 24 more
我编写的代码用于从 JavaMailApi 的 Message 对象中检索 MimeMultipart，以使用附加函数设置在 apache common 的 org.apache.commons.mail.MultiPartEmail 对象中。
public MimeMultipart getMimeMultipart(Message message) throws Exception {
Object content = message.getContent();
if (content instanceof String)
return null;
if (content instanceof MimeMultipart) {
MimeMultipart multiPartResult = new MimeMultipart();
MimeMultipart multiPart = (MimeMultipart) content;
List<BodyPart> result = new ArrayList<>();
for (int i = 0; i < multiPart.getCount(); i++) {
BodyPart bodyPart = (BodyPart) multiPart.getBodyPart(i);
result.addAll(getMimeMultipart(bodyPart));
}
for(BodyPart part:result) {
multiPart.addBodyPart(part);
}
return multiPartResult;
}
return null;
}
private List<BodyPart> getMimeMultipart(BodyPart part) throws Exception{
List<BodyPart> result = new ArrayList<>();
Object content = part.getContent();
if (content instanceof InputStream || content instanceof String) {
if (Part.ATTACHMENT.equalsIgnoreCase(part.getDisposition()) || StringUtils.isNotBlank(part.getFileName())) {
result.add(part);
}
return result;
}
if (content instanceof MimeMultipart) {
MimeMultipart multipart = (MimeMultipart) content;
for (int i = 0; i < multipart.getCount(); i++) {
BodyPart bodyPart = (BodyPart) multipart.getBodyPart(i);
result.addAll(getMimeMultipart(bodyPart));
}
}
return result;
}
我能够转发不包括附件的电子邮件，但在转发 attachments/inline 图片时遇到问题。
请帮我解决这个问题。
我可以转发完整的邮件作为附件，如何原样转发邮件。[=19=]
MultiPartEmail email = new MultiPartEmail();
MimeMultipart mp = new MimeMultipart();
MimeBodyPart fmbp = new MimeBodyPart();
fmbp.setContent(message, "message/rfc822");
fmbp.setDisposition(Part.INLINE);
mp.addBodyPart(fmbp);
email.setContent(mp);
或者如果我使用代码
MimeMultipart mp = (MimeMultipart) message.getContent();
email.setContent(mp, message.getContentType());
我收到这样的转发邮件
screenshot of forwarded encoded mail
这里的情况是在同一个应用程序中从一个邮件服务器读取邮件并将相同的邮件发送到另一个电子邮件 ID。
为此，我使用 Java 邮件 API 进行阅读和发送。
如果您在这两个步骤中使用不同的主机，请务必更新属性。
private void sendMailJavax(Message oldMessage) {
try {
// creating a new message using the older message
MimeMessage message = new MimeMessage((MimeMessage)oldMessage);
// updating properties as per sender Mailing API
message.getSession().getProperties().clear();
message.getSession().getProperties().setProperty("mail.smtp.host", forwardHost);
// setting appropriate headers. // make sure you don't append using .add methods.
message.setFrom(new InternetAddress(emailFrom));
message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
message.setReplyTo(new Address[] { new InternetAddress(replyToEmail)});
Transport.send(message);
System.out.println("Email Sent successfully....");
} catch (MessagingException mex) {
mex.printStackTrace();
}
}
我正在阅读来自 Outlook 网络邮件的邮件并获取邮件列表 ('javax.mail.Message')。现在我想使用 java 程序将这些消息转发到另一个电子邮件地址。
private void sendTestMail(String from, String subject, String sentDate, Object object, Message message)
throws EmailException, Exception {
MultiPartEmail email = new MultiPartEmail();
email.setHostName(forwardHost);
email.addTo(mailRecipients(to));
email.setFrom(emailFrom);
email.setSubject(subject);
email.setMsg("Testing email by sahil.");
EmailAttachment attachment = new EmailAttachment();
attachment.setPath("c:\sahil\test.jpg");
attachment.setDisposition(EmailAttachment.ATTACHMENT);
attachment.setDescription("Picture_of_John");
attachment.setName("John.jpg");
email.attach(attachment);
MimeMultipart multiPart = getMimeMultipart(message);
email.addPart(multiPart);
email.send();
}
如果我在上面的代码中的两行下面注释，那么它就可以正常工作。
MimeMultipart multiPart = getMimeMultipart(message);
email.addPart(multiPart);
但是这两行我遇到了异常。
2020-04-20 15:41:44,271 ERROR com.st.ict.ols.service.impl.ReplyToMessageServiceImpl [main] Inner Exception occurred while processing individual message. Error stacktrace is[org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtpapp1.sgp.st.com:25
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1421)
at org.apache.commons.mail.Email.send(Email.java:1448)
at com.st.ict.ols.service.impl.ReplyToMessageServiceImpl.sendTestMail(ReplyToMessageServiceImpl.java:342)
at com.st.ict.ols.service.impl.ReplyToMessageServiceImpl.processMessage(ReplyToMessageServiceImpl.java:167)
at com.st.ict.ols.service.impl.MessageServiceImpl.processMessage(MessageServiceImpl.java:22)
at com.st.ict.ols.OlsMailSenderApplication.run(OlsMailSenderApplication.java:36)
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:732)
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:716)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:703)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:304)
at com.st.ict.ols.OlsMailSenderApplication.main(OlsMailSenderApplication.java:27)
Caused by: javax.mail.MessagingException: IOException while sending message;
nested exception is:
java.io.IOException: Exception writing Multipart
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1308)
at javax.mail.Transport.send0(Transport.java:255)
at javax.mail.Transport.send(Transport.java:124)
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1411)
... 10 more
Caused by: java.io.IOException: Exception writing Multipart
at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:83)
at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:884)
at javax.activation.DataHandler.writeTo(DataHandler.java:317)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1652)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:961)
at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:553)
at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:81)
at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:884)
at javax.activation.DataHandler.writeTo(DataHandler.java:317)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1652)
at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1850)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1259)
... 13 more
Caused by: javax.mail.MessagingException: Empty multipart: multipart/mixed;
boundary="----=_Part_1_1176580790.1587377502798"
at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:548)
at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:81)
... 24 more
我编写的代码用于从 JavaMailApi 的 Message 对象中检索 MimeMultipart，以使用附加函数设置在 apache common 的 org.apache.commons.mail.MultiPartEmail 对象中。
public MimeMultipart getMimeMultipart(Message message) throws Exception {
Object content = message.getContent();
if (content instanceof String)
return null;
if (content instanceof MimeMultipart) {
MimeMultipart multiPartResult = new MimeMultipart();
MimeMultipart multiPart = (MimeMultipart) content;
List<BodyPart> result = new ArrayList<>();
for (int i = 0; i < multiPart.getCount(); i++) {
BodyPart bodyPart = (BodyPart) multiPart.getBodyPart(i);
result.addAll(getMimeMultipart(bodyPart));
}
for(BodyPart part:result) {
multiPart.addBodyPart(part);
}
return multiPartResult;
}
return null;
}
private List<BodyPart> getMimeMultipart(BodyPart part) throws Exception{
List<BodyPart> result = new ArrayList<>();
Object content = part.getContent();
if (content instanceof InputStream || content instanceof String) {
if (Part.ATTACHMENT.equalsIgnoreCase(part.getDisposition()) || StringUtils.isNotBlank(part.getFileName())) {
result.add(part);
}
return result;
}
if (content instanceof MimeMultipart) {
MimeMultipart multipart = (MimeMultipart) content;
for (int i = 0; i < multipart.getCount(); i++) {
BodyPart bodyPart = (BodyPart) multipart.getBodyPart(i);
result.addAll(getMimeMultipart(bodyPart));
}
}
return result;
}
我能够转发不包括附件的电子邮件，但在转发 attachments/inline 图片时遇到问题。
请帮我解决这个问题。
我可以转发完整的邮件作为附件，如何原样转发邮件。[=19=]
MultiPartEmail email = new MultiPartEmail();
MimeMultipart mp = new MimeMultipart();
MimeBodyPart fmbp = new MimeBodyPart();
fmbp.setContent(message, "message/rfc822");
fmbp.setDisposition(Part.INLINE);
mp.addBodyPart(fmbp);
email.setContent(mp);
或者如果我使用代码
MimeMultipart mp = (MimeMultipart) message.getContent();
email.setContent(mp, message.getContentType());
我收到这样的转发邮件 screenshot of forwarded encoded mail
这里的情况是在同一个应用程序中从一个邮件服务器读取邮件并将相同的邮件发送到另一个电子邮件 ID。
为此，我使用 Java 邮件 API 进行阅读和发送。 如果您在这两个步骤中使用不同的主机，请务必更新属性。
private void sendMailJavax(Message oldMessage) {
try {
// creating a new message using the older message
MimeMessage message = new MimeMessage((MimeMessage)oldMessage);
// updating properties as per sender Mailing API
message.getSession().getProperties().clear();
message.getSession().getProperties().setProperty("mail.smtp.host", forwardHost);
// setting appropriate headers. // make sure you don't append using .add methods.
message.setFrom(new InternetAddress(emailFrom));
message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
message.setReplyTo(new Address[] { new InternetAddress(replyToEmail)});
Transport.send(message);
System.out.println("Email Sent successfully....");
} catch (MessagingException mex) {
mex.printStackTrace();
}
}