{{{
#!html
<div style="text-align: center; color:#151B8D"><big style="font-weight: bold;"><big><big>
使用 java api 寄信
</big></big></big></div> <div style="text-align: center; color:#7E2217"><big style="font-weight: bold;"><big>
javamail 1.4.4 + java 6 + sendmail
</big></big></div>
}}}

[[PageOutline]]



 * 系統要裝能寄信的工具

{{{
sudo apt-get install sendmail sendmail-bin
}}}

 * 下載 javamail ; 雖然網站上有寫，但此次不需要  JavaBeans Activation Framework (JAF)
[http://www.oracle.com/technetwork/java/javamail/index.html]

 * 解壓縮後，將 javamail.jar 放到 classpath 內

 * 測試將 /home/waue/Desktop/index.html 寄到 gmail

 * 程式碼 
{{{
#!java
package tw.org.nchc.icasIII;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.Transport;
import javax.mail.URLName;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.util.ByteArrayDataSource;

public class sendhtml {

	public static void main(String[] argv) {
		new sendhtml(argv);
	}

	public sendhtml(String[] argv) {

		String to, subject = null, from = null;
		String cc = null, bcc = null, url = null;
		String mailhost = null;
		String mailer = "sendhtml";
		String protocol = null, host = null, user = null, password = null;
		String record = null; // name of folder in which to record mail
		boolean debug = false;
		int optind;
		
		to = "waue0920@gmail.com";
		subject = "test, javamail";
		from = "waue0920@nchc.org.tw";
		cc = null;
		bcc = null;
		url = null;
		mailhost = "localhost";
		mailer = "sendhtml";
		protocol = null;
		host = null;
		user = null;
		password = null;
		record = null; // name of folder in which to record mail
		
		try {
			BufferedReader in = new BufferedReader(new FileReader(new File("/home/waue/Desktop/index.html")));
			if (subject == null) {
				System.out.print("Subject: ");
				System.out.flush();
				subject = in.readLine();
			} else {
				System.out.println("Subject: " + subject);
			}

			Properties props = System.getProperties();

			if (mailhost != null)
				props.put("mail.smtp.host", mailhost);

			Session session = Session.getInstance(props, null);
			if (debug)
				session.setDebug(true);

			// construct the message
			Message msg = new MimeMessage(session);
			if (from != null)
				msg.setFrom(new InternetAddress(from));
			else
				msg.setFrom();

			msg.setRecipients(Message.RecipientType.TO,
					InternetAddress.parse(to, false));
			if (cc != null)
				msg.setRecipients(Message.RecipientType.CC,
						InternetAddress.parse(cc, false));
			if (bcc != null)
				msg.setRecipients(Message.RecipientType.BCC,
						InternetAddress.parse(bcc, false));

			msg.setSubject(subject);

			collect(in, msg);

			msg.setHeader("X-Mailer", mailer);
			msg.setSentDate(new Date());

			// send the thing off
			Transport.send(msg);

			System.out.println("\nMail was sent successfully.");

			// Keep a copy, if requested.

			if (record != 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();
				}

				// Get record Folder. Create if it does not exist.
				Folder folder = store.getFolder(record);
				if (folder == null) {
					System.err.println("Can't get record folder.");
					System.exit(1);
				}
				if (!folder.exists())
					folder.create(Folder.HOLDS_MESSAGES);

				Message[] msgs = new Message[1];
				msgs[0] = msg;
				folder.appendMessages(msgs);

				System.out.println("Mail was recorded successfully.");
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void collect(BufferedReader in, Message msg)
			throws MessagingException, IOException {
		String line;
		String subject = msg.getSubject();
		StringBuffer sb = new StringBuffer();
		sb.append("<HTML>\n");
		sb.append("<HEAD>\n");
		sb.append("<TITLE>\n");
		sb.append(subject + "\n");
		sb.append("</TITLE>\n");
		sb.append("</HEAD>\n");

		sb.append("<BODY>\n");
		sb.append("<H1>" + subject + "</H1>" + "\n");

		while ((line = in.readLine()) != null) {
			sb.append(line);
			sb.append("\n");
		}

		sb.append("</BODY>\n");
		sb.append("</HTML>\n");

		msg.setDataHandler(new DataHandler(new ByteArrayDataSource(sb
				.toString(), "text/html")));
	}
}

}}}

 * 可以參考 demo 內的範例寫 java 寄信的 code