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我正在嘗試從退回的郵件中讀取附件的名稱。這是我能夠得到它的一種方式，但我想知道是否有更好的方法來做到這一點。這非常耗時。從退回的郵件中讀取附件名稱
以下是完整的代碼。
import java.io.BufferedReader;
import java.io.StringReader;
import java.util.Properties;
import java.util.Scanner;
import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.search.FlagTerm;
public class CheckingMail {
public static void check(String host, String storeType, String user, String password)
{
try {
Properties properties = new Properties();
properties.put("mail.imap.host", host);
properties.put("mail.imap.port", "993");
properties.put("mail.imap.starttls.enable", "true");
Session emailSession = Session.getDefaultInstance(properties);
Store store = emailSession.getStore("imaps");
store.connect(host, user, password);
Folder emailFolder = store.getFolder("INBOX");
emailFolder.open(Folder.READ_WRITE);
System.out.println("emailFolder.hasNewMessages()---" + emailFolder.hasNewMessages());
System.out.println("emailFolder.getNewMessageCount---" + emailFolder.getNewMessageCount());
System.out.println("emailFolder.getUnreadMessageCount---" + emailFolder.getUnreadMessageCount());
Message[] messages = emailFolder.search(new FlagTerm(new Flags(Flags.Flag.RECENT), false));
System.out.println("messages.length---" + messages.length);
int bcnt = 0;
for (int i = 0, n = messages.length; i < n; i++) {
Message message = messages[i];
if(message.getFrom()[0].toString().contains("MAILER-DAEMON")){
bcnt++;
}
System.out.println("---------------------------------");
System.out.println("Email Number " + (i + 1));
System.out.println("Subject: " + message.getSubject());
System.out.println("From: " + message.getFrom()[0]);
long start = System.currentTimeMillis();
int index = -1;
BufferedReader reader = new BufferedReader(new StringReader(message.getContent().toString()));
String str = "" , filename = "";
while ((str = reader.readLine()) != null) {
index = str.indexOf("filename");
if(index >-1){
filename = str.substring(index+9);
if (filename.length() > 0) System.out.println("Attachment : " + filename);
}
}
System.out.printf("Time : %d%n", System.currentTimeMillis() - start);
for(int j=0;j<message.getAllRecipients().length; j++){
System.out.println("Recipients "+j+" : " + message.getAllRecipients()[j]);
}
System.out.println("Date: " + message.getSentDate());
}
System.out.println("Bounce count : " + bcnt);
emailFolder.close(false);
store.close();
} catch (NoSuchProviderException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
String host = "imap.mail.yahoo.com";
String mailStoreType = "imap";
String username = "[email protected]";
String password = "*****";
check(host, mailStoreType, username, password);
}
}
的實例郵件
Sorry, we were unable to deliver your message to the following address.
<[email protected]>:
No MX or A records for yahoo.fhdf
--- Below this line is a copy of the message.
Received: from [ip] with NNFMP; 02 Jul 2015 07:26:24 -0000
Received: from [ip] with NNFMP; 02 Jul 2015 07:23:24 -0000
Received: from [ip] with NNFMP; 02 Jul 2015 07:23:21 -0000
Received: from [ip] with NNFMP; 02 Jul 2015 07:23:21 -0000
Received: from [] with NNFMP; 02 Jul 2015 07:23:21 -0000
X-Yahoo-Newman-Property: ymail-4
X-Yahoo-Newman-Id: [email protected]
X-YMail-OSG: ByrxKJsVM1ngLTK9ms.eLuFTCEl6w0XU0HtbGqwE70HR4CtF8BU_giAhODvLvMc
NiITUbpoTi2nhfKQ0WnxsPY4KMJyCRONlErkMhBA8a_bi7HLGeUqj53lPEgJ9oZtyTxykF4OVqw8
e3Y0LO_rgeE49pQzvjFDNmE7L3kAePyzTbWfPv7Vper3tC8kWTTU21W5POlCB7LQ38FJoMsGOtSq
qRjYLEILpy6xk34mPTwiSXkIb8iU.--
Received: by 217.12.9.9; Thu, 02 Jul 2015 07:23:21 +0000
Date: Thu, 2 Jul 2015 07:23:20 +0000 (UTC)
From: test <[email protected]>
Reply-To: test <[email protected]>
To: "[email protected]" <[email protected]>
Message-ID: <[email protected]>
Subject:
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_Part_1267464_969780179.1435821801286"
Content-Length: 293584
------=_Part_1267464_969780179.1435821801286
Content-Type: multipart/alternative;
boundary="----=_Part_1267463_786603392.1435821801283"
------=_Part_1267463_786603392.1435821801283
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
------=_Part_1267463_786603392.1435821801283
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit
<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:16px"><div id="yui_3_16_0_1_1435820944162_7576"><br></div></div></body></html>
------=_Part_1267463_786603392.1435821801283--
------=_Part_1267464_969780179.1435821801286
Content-Type: application/pdf
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=img-211134632-0001.pdf
Content-ID: <[email protected]>
JVBERi0xLjQKJeLjz9MKMSAwIG9iago8PAovQ3JlYXRvciAoWGVyb3ggV29ya0NlbnRyZSA1MjMw
這樣一個退回郵件的例子會有所幫助。 – RealSkeptic
@RealSkeptic我已經添加了一個反彈郵件示例 – Ace
我認爲您的方法的主要問題是缺乏可靠性 - 郵件可能包含與附件無關的單詞「文件名」。如果所有退回的消息都與示例類似，我可能會刪除所有行，直到嵌入的副本，然後將其解析爲消息並處理該消息。這會更可靠，但不一定更高效。但並非所有的反彈看起來都一樣，甚至不會給你一個完整的消息副本。 – RealSkeptic