23 December 2010

Fetch Mails From IMAP server using Java Mail API

Requisite:
  • The JavaMail API supports JDK 1.4 or higher
  • JavaMail API 1.4.3 release
  • Please see the FAQ



import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

/*
* Application for Fetching mails from IMAP server
*
* @author Prashant A. Gadekar
*/

public class MerceIndexer
{

public static void main(String argv[])
{
String url = null;
String protocol = "imap";
String host = "localhost";
String user = "user";
String password = "passowrd";

try {
// Get a Properties object
Properties props = System.getProperties();

// Get a Session object
Session session = Session.getInstance(props, null);

// Get a Store object
Store store = null;
if (url != null) {
URLName urln = new URLName(url);
store = session.getStore(urln);
store.connect();
} else {
if (protocol != null)
store = session.getStore(protocol);
else
store = session.getStore();

// Connect
if (host != null || user != null || password != null)
store.connect(host, user, password);
else
store.connect();
}

// Open the Folder
String mbox = "INBOX";
Folder folder = store.getDefaultFolder();
if (folder == null) {
System.out.println("No default folder");
System.exit(1);
}

folder = folder.getFolder(mbox);
if (!folder.exists()) {
System.out.println(mbox + " does not exist");
System.exit(1);
}

if (!(folder instanceof UIDFolder)) {
System.out.println(
"This Provider or this folder does not support UIDs");
System.exit(1);
}

UIDFolder ufolder = (UIDFolder)folder;

folder.open(Folder.READ_WRITE);
int totalMessages = folder.getMessageCount();

if (totalMessages == 0) {
System.out.println("Empty folder");
folder.close(false);
store.close();
System.exit(1);
}

// Attributes & Flags for ALL messages ..
Message[] msgs = ufolder.getMessagesByUID(1, UIDFolder.LASTUID);
// Use a suitable FetchProfile
FetchProfile fp = new FetchProfile();
fp.add(FetchProfile.Item.ENVELOPE);
fp.add(FetchProfile.Item.FLAGS);
folder.fetch(msgs, fp);

for (int i = 0; i < msgs.length; i++) {
System.out.println("--------------------------");
System.out.println("MESSAGE UID #" +
ufolder.getUID(msgs[i]) + ":");
dumpPart(msgs[i]);
}

folder.close(false);
store.close();
} catch (Exception ex) {
System.out.println("Oops, got exception! " + ex.getMessage());
ex.printStackTrace();
System.exit(1);
}
}

public static void dumpPart(Part p) throws Exception
{
if (p instanceof Message) {
dumpEnvelope((Message)p);
}
System.out.println("CONTENT-TYPE: " + p.getContentType());

Object o = p.getContent();
if (o instanceof String) {
System.out.println("This is a String");
System.out.println("---------------------------");
System.out.println((String)o);
} else if (o instanceof Multipart) {
System.out.println("This is a Multipart");
System.out.println("---------------------------");
Multipart mp = (Multipart)o;
int count = mp.getCount();
for (int i = 0; i < count; i++)
dumpPart(mp.getBodyPart(i));
} else if (o instanceof Message) {
System.out.println("This is a Nested Message");
System.out.println("---------------------------");
dumpPart((Part)o);
} else if (o instanceof InputStream) {
InputStream is = (InputStream)o;
int c;
while ((c = is.read()) != -1) {
System.out.write(c);
}
}

}

public static void dumpEnvelope(Message m) throws Exception
{
System.out.println("This is the message envelope");
System.out.println("---------------------------");
Address[] a;
// FROM
if ((a = m.getFrom()) != null) {
for (int j = 0; j < a.length; j++)
System.out.println("FROM: " + a[j].toString());
}

// TO
if ((a = m.getRecipients(Message.RecipientType.TO)) != null) {
for (int j = 0; j < a.length; j++)
System.out.println("TO: " + a[j].toString());
}

// SUBJECT
System.out.println("SUBJECT: " + m.getSubject());

// DATE
Date d = m.getSentDate();
System.out.println("SendDate: " +
(d != null ? d.toString() : "UNKNOWN"));

// SIZE
System.out.println("Size: " + m.getSize());
}
}

2 comments:

  1. If you want to connect on SSL set the following properties:

    props.setProperty("mail.imap.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    props.setProperty("mail.imap.socketFactory.port","993");

    ReplyDelete