Commons Net example source code file (SMTPMail.java)

This example Commons Net source code file (SMTPMail.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

arraylist, bufferedreader, bufferedreader, filename, filereader, filereader, io, printcommandlistener, simplesmtpheader, smtpclient, smtpclient, string, string, subject, util, writer

The Commons Net SMTPMail.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.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.net.PrintCommandListener;
import org.apache.commons.net.io.Util;
import org.apache.commons.net.smtp.SMTPClient;
import org.apache.commons.net.smtp.SMTPReply;
import org.apache.commons.net.smtp.SimpleSMTPHeader;

/***
 * This is an example program using the SMTP package to send a message
 * to the specified recipients.  It prompts you for header information and
 * a filename containing the message.
 * <p>
 ***/

public final class SMTPMail
{

    public final static void main(String[] args)
    {
        String sender, recipient, subject, filename, server, cc;
        List<String> ccList = new ArrayList();
        BufferedReader stdin;
        FileReader fileReader = null;
        Writer writer;
        SimpleSMTPHeader header;
        SMTPClient client;

        if (args.length < 1)
        {
            System.err.println("Usage: mail smtpserver");
            System.exit(1);
        }

        server = args[0];

        stdin = new BufferedReader(new InputStreamReader(System.in));

        try
        {
            System.out.print("From: ");
            System.out.flush();

            sender = stdin.readLine();

            System.out.print("To: ");
            System.out.flush();

            recipient = stdin.readLine();

            System.out.print("Subject: ");
            System.out.flush();

            subject = stdin.readLine();

            header = new SimpleSMTPHeader(sender, recipient, subject);


            while (true)
            {
                System.out.print("CC <enter one address per line, hit enter to end>: ");
                System.out.flush();

                cc = stdin.readLine();

                if (cc== null || cc.length() == 0)
                    break;

                header.addCC(cc.trim());
                ccList.add(cc.trim());
            }

            System.out.print("Filename: ");
            System.out.flush();

            filename = stdin.readLine();

            try
            {
                fileReader = new FileReader(filename);
            }
            catch (FileNotFoundException e)
            {
                System.err.println("File not found. " + e.getMessage());
            }

            client = new SMTPClient();
            client.addProtocolCommandListener(new PrintCommandListener(
                                                  new PrintWriter(System.out), true));

            client.connect(server);

            if (!SMTPReply.isPositiveCompletion(client.getReplyCode()))
            {
                client.disconnect();
                System.err.println("SMTP server refused connection.");
                System.exit(1);
            }

            client.login();

            client.setSender(sender);
            client.addRecipient(recipient);



            for (String recpt : ccList)
                client.addRecipient(recpt);

            writer = client.sendMessageData();

            if (writer != null)
            {
                writer.write(header.toString());
                Util.copyReader(fileReader, writer);
                writer.close();
                client.completePendingCommand();
            }

            if (fileReader != null ) {
                fileReader.close();
            }

            client.logout();

            client.disconnect();
        }
        catch (IOException e)
        {
            e.printStackTrace();
            System.exit(1);
        }
    }
}