从.eml文件中获取文本的最佳方式是什么

Question

我试图从本地驱动器上的几个eml文件中获取主题和消息正文。现在我尝试使用Apache Commons电子邮件，但有时它会循环而不会出错。这是我的代码，它应该从eml中获取文本并将其保存到txt:

MimeMessage mimeMessage = MimeMessageUtils.createMimeMessage(null, file);
MimeMessageParser parser = new MimeMessageParser(mimeMessage);
if (parser.parse().hasPlainContent()) {
//Trying to get text of the message
try (FileWriter writer = new FileWriter(txtName)) {
writeHeaders(writer, parser);
writer.write(parser.parse().getPlainContent());
} catch (IOException e) {
e.printStackTrace();
}
} else if (parser.parse().hasHtmlContent()) {
try (FileWriter writer = new FileWriter(txtName)) {
writeHeaders(writer, parser);
String text = Jsoup.parse(parser.parse().getHtmlContent()).text();
writer.write(text);
} catch (IOException e) {
e.printStackTrace();
}
}

这里还有writeHeaders方法：

private void writeHeaders(FileWriter writer, MimeMessageParser parser) throws Exception {
writer.write("From :" + parser.getFrom() + "n");
writer.write("To：" + parser.getTo() + "n");
writer.write("Subject：" + parser.getSubject() + "n");
writer.write("Message:" + "n" + "n");
}

下面是获取附件的方法：

if (parser.parse().hasAttachments()) {
//Getting and saving attachments from eml
List<DataSource> attachments = parser.parse().getAttachmentList();
for (DataSource attachment : attachments) {
if (attachment.getName() != null && !attachment.getName().isEmpty()) {
try (InputStream is = attachment.getInputStream()) {
File save = new File(saveDir + File.separator + attachment.getName());
FileOutputStream fos = new FileOutputStream(save);
byte[] buf = new byte[4096];
int bytesRead;
while ((bytesRead = is.read(buf)) != -1) {
fos.write(buf, 0, bytesRead);
}
fos.close();
if (save.getName().endsWith("eml")) {
parseEml(save, count);
}
} catch (Exception e) {
e.printStackTrace();
}

那么，也许有什么更简单的方法可以获取文本和附件呢？

Answer 1

是更容易。SimpleJavaMail(Github(可以读取.eml文件，并使内容非常容易访问。如果你在那里也发现了类似循环错误的东西(不太可能(，我很乐意在那里为你提供帮助(我积极维护Simple Java Mail(：

Email email = EmailConverter.emlToEmail(emlFile);
email.getFromRecipient();
email.getSubject();
email.getPlainText();
email.getHTMLText();
email.getAttachments();
email.getEmbeddedImages();
email.getHeaders();
// etc. etc.

还支持S/MIME加密电子邮件(如果您拥有解密电子邮件所需的证书(。