java mail 读取邮件附件 java读取邮箱邮件

我正在使用javax.mail开发客户端邮件来读取邮箱内的邮件：

Properties properties = System.getProperties();
properties.setProperty("mail.store.protocol", "imap");
try {
Session session = Session.getDefaultInstance(properties, null);
Store store = session.getStore("pop3");//create store instance
store.connect("pop3.domain.it", "mail.it", "*****");
Folder inbox = store.getFolder("inbox");
FlagTerm ft = new FlagTerm(new Flags(Flags.Flag.SEEN), false);
inbox.open(Folder.READ_ONLY);//set access type of Inbox
Message messages[] = inbox.search(ft);
String mail,sub,bodyText="";
Object body;
for(Message message:messages) {
mail = message.getFrom()[0].toString();
sub = message.getSubject();
body = message.getContent();
//bodyText = body.....
}
} catch (Exception e) {
System.out.println(e);
}

我知道方法getContent()返回一个对象,因为内容可能是一个String,一个MimeMultiPart,一个SharedByteArrayInputstream和其他(我认为)……有没有办法在消息正文中获取文本？谢谢！！

最佳答案

这个答案延伸到yurin’s answer.他提出的问题是MimeMultipart的内容本身可能是另一个MimeMultipart.下面的getTextFromMimeMultipart()方法在这种情况下对内容进行递归,直到完全解析了消息体.

private String getTextFromMessage(Message message) throws MessagingException, IOException {
String result = "";
if (message.isMimeType("text/plain")) {
result = message.getContent().toString();
} else if (message.isMimeType("multipart/*")) {
MimeMultipart mimeMultipart = (MimeMultipart) message.getContent();
result = getTextFromMimeMultipart(mimeMultipart);
}
return result;
}
private String getTextFromMimeMultipart(
MimeMultipart mimeMultipart) throws MessagingException, IOException{
String result = "";
int count = mimeMultipart.getCount();
for (int i = 0; i < count; i++) {
BodyPart bodyPart = mimeMultipart.getBodyPart(i);
if (bodyPart.isMimeType("text/plain")) {
result = result + "
" + bodyPart.getContent();
break; // without break same text appears twice in my tests
} else if (bodyPart.isMimeType("text/html")) {
String html = (String) bodyPart.getContent();
result = result + "
" + org.jsoup.Jsoup.parse(html).text();
} else if (bodyPart.getContent() instanceof MimeMultipart){
result = result + getTextFromMimeMultipart((MimeMultipart)bodyPart.getContent());
}
}
return result;
}