java mail recieve 1

[fuadhamidov]

hi

i need an example code about how i can get mail from mail server. i have found a number examples for java send mail but no one for java get mail

 

[sedj]

This one is for POP3 :

http://www.javaworld.com/javaworld/jw-10-2001/jw-1026-javamail-p2.html

but the pronciple is the same for IMAP. Remember though that for IMAP, you have to 'ping' the server to get new messages, so I expect you will want to implement the MessageCountListener and keep calling getMessageCount(), and then retrieving the new mails using the MessageCountEvent.getMessages() call.

You may want to look at

http://www.jguru.com/faq/JavaMail

also.

 

[hologram]

From "Java 2 Network Protocols. Black Book" (Al Williams) from Coriolis

POP3 :

// JavaMail Demo -- Williams
import javax.mail.*;
import javax.mail.internet.*;
import java.util.Properties;

public class JMailDemo {
    public static void main(String args[]) throws Exception {
	String host = args[0];
	String username = args[1];
	String password = args[2];

	// Create empty properties
	Properties props = new Properties();
	
	// Get session
	Session session = Session.getDefaultInstance(props, null);

	// Get the store
	Store store = session.getStore("pop3");
	store.connect(host, username, password);

	// Get folder
	Folder folder = store.getFolder("INBOX");
	folder.open(Folder.READ_ONLY);

	// Get directory
	Message message[] = folder.getMessages();

	// print first sender, subject, and message
	for (int i=0, n=message.length; i<n; i++) {
	    System.out.println(i + ": " + message[i].getFrom()[0] 
			       + "\t" + message[i].getSubject());
	    System.out.println(message[i].getContent().toString());
	}

	// Close connection 
	folder.close(false);
	store.close();
    }
}

IMAP :

// JavaMail Demo -- Williams
import javax.mail.*;
import javax.mail.internet.*;
import java.util.Properties;

public class IMapMailDemo {
    public static void main(String args[]) throws Exception {
	String host = args[0];
	String username = args[1];
	String password = args[2];

	// Create empty properties
	Properties props = new Properties();
	
	// Get session
	Session session = Session.getDefaultInstance(props, null);

	// Get the store
	Store store = session.getStore("imap");
	store.connect(host, username, password);

	// Get folder
	Folder folder = store.getFolder("INBOX");
	folder.open(Folder.READ_ONLY);
	// print sub folders
	Folder [] folders = folder.list();
	if (folders.length==0) System.out.println("No sub folders");
	for (int ij=0;ij<folders.length;ij++) {
	    System.out.println("Subfolder: " + folders[ij].getFullName());
	}


	// Get directory
	Message message[] = folder.getMessages();
	if (message.length==0) System.out.println("No mail");
	// print first sender, subject, and message
	for (int i=0, n=message.length; i<n; i++) {
	    System.out.println(i + ": " + message[i].getFrom()[0] 
			       + "\t" + message[i].getSubject());
	    System.out.println(message[i].getContent().toString());
	}

	// Close connection 
	folder.close(false);
	store.close();
    }
}

 

[fuadhamidov]

i have two problem

1.

System.out.println(message[i].getContent().toString());

gives
javax.mail.internet.MimeMultipart@196c1b0,
not content

2.i put "fetching mail" in a method which returns message, so Folder and Store are closed at the end of method. It is interesting if i disable

System.out.println(i + ": " + message[i].getFrom()[0] 
                   + "\t" + message[i].getSubject());
System.out.println(message[i].getContent().toString());

statement in the FetchMail() method, i get following message

java.lang.IllegalStateException: Folder is not Open


i can't understand why, but i have tried several times. is reason that Message not be invoked.