Commons Net example source code file (IMAPMail.java)

This example Commons Net source code file (IMAPMail.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons Net tags/keywords

could, imapclient, imapclient, imapmail, imapmail, imapsclient, io, ioexception, ioexception, messages, runtimeexception, string, string, tls, usage

The Commons Net IMAPMail.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package examples.mail;

import java.io.IOException;

import org.apache.commons.net.PrintCommandListener;
import org.apache.commons.net.imap.IMAPClient;
import org.apache.commons.net.imap.IMAPSClient;

/**
 * This is an example program demonstrating how to use the IMAP[S]Client class.
 * This program connects to a IMAP[S] server, lists its capabilities and shows
 * the status of the inbox.
 * <p>
 * Usage: IMAPMail <imap[s] server hostname>   [secure protocol, e.g. TLS]
 * <p>
 */
public final class IMAPMail
{

    public static final void main(String[] args)
    {
        if (args.length < 3)
        {
            System.err.println(
                "Usage: IMAPMail <imap server hostname>   [TLS]");
            System.exit(1);
        }

        String server = args[0];
        String username = args[1];
        String password = args[2];

        String proto = (args.length > 3) ? args[3] : null;

        IMAPClient imap;

        if (proto != null) {
            System.out.println("Using secure protocol: " + proto);
            imap = new IMAPSClient(proto, true); // implicit
            // enable the next line to only check if the server certificate has expired (does not check chain):
//            ((IMAPSClient) imap).setTrustManager(TrustManagerUtils.getValidateServerCertificateTrustManager());
            // OR enable the next line if the server uses a self-signed certificate (no checks)
//            ((IMAPSClient) imap).setTrustManager(TrustManagerUtils.getAcceptAllTrustManager());
        } else {
            imap = new IMAPClient();
        }
        System.out.println("Connecting to server " + server + " on " + imap.getDefaultPort());

        // We want to timeout if a response takes longer than 60 seconds
        imap.setDefaultTimeout(60000);

        // suppress login details
        imap.addProtocolCommandListener(new PrintCommandListener(System.out, true));

        try
        {
            imap.connect(server);
        }
        catch (IOException e)
        {
            throw new RuntimeException("Could not connect to server.", e);
        }

        try
        {
            if (!imap.login(username, password))
            {
                System.err.println("Could not login to server. Check password.");
                imap.disconnect();
                System.exit(3);
            }

            imap.setSoTimeout(6000);

            imap.capability();

            imap.select("inbox");

            imap.examine("inbox");

            imap.status("inbox", new String[]{"MESSAGES"});

            imap.logout();
            imap.disconnect();
        }
        catch (IOException e)
        {
            System.out.println(imap.getReplyString());
            e.printStackTrace();
            System.exit(10);
            return;
        }
    }
}

/* kate: indent-width 4; replace-tabs on; */