Javamail邮件发送程序（smtp）

import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

import org.apache.commons.lang.StringUtils;

/**
 * 邮件发送器，方法调用顺序：<code>connect->send->close</code>。
 */
public class MailSender {
	public static final String DEFAULT_MIME_TYPE = "text/html;charset=gb2312";

	private String smtp;
	private String serverName;
	private String serverPasswd;
	private String from;

	private Session session;
	private Transport transport;

	/**
	 * 构造器
	 * 
	 * @param smtp
	 *            SMTP服务地址
	 * @param serverName
	 *            服务用户名
	 * @param serverPasswd
	 *            服务密码
	 * @param from
	 *            发送邮件的Email
	 */
	public MailSender(String smtp, String serverName, String serverPasswd,
			String from) {
		super();
		this.smtp = smtp;
		this.serverName = serverName;
		this.serverPasswd = serverPasswd;
		this.from = from;
	}
	
	/**
	 * 连接邮件服务器
	 */
	public void connect() throws NoSuchProviderException {
		// ResourceBundle mailProps = ResourceBundle.getBundle("mail");
		// 可以从配置文件读取相应的参数
		Properties props = System.getProperties(); // 获得系统属性对象
		props.put("mail.smtp.host", smtp); // 设置SMTP主机
		props.put("mail.smtp.auth", "true"); // 是否到服务器用户名和密码验证
		// 到服务器验证发送的用户名和密码是否正确
		MailAutherticator emailAuther = new MailAutherticator(this.serverName,
				this.serverPasswd);
		// 设置邮件会话
		this.session = Session.getInstance(props, emailAuther);
		// 设置传输协议
		this.transport = session.getTransport("smtp");
	}

	/**
	 * 发送邮件
	 * 
	 * @param toEmails
	 *            邮件接收地址列表
	 * @param subject
	 *            主题
	 * @param content
	 *            正文
	 * @param fileNames
	 *            附件列表（文件名,显示名称）. <code>null</code>表示无附件.
	 * @param mimeType
	 *            MIME 类型
	 * @throws MessagingException
	 * @throws UnsupportedEncodingException
	 *             如果读取附件或发送失败
	 */
	public void send(String[] toEmails, String subject, String content,
			String[] fileNames, String mimeType) throws MessagingException,
			UnsupportedEncodingException {
		// 设置from、to等信息
		MimeMessage mimeMsg = new MimeMessage(this.session);
		if (!StringUtils.isEmpty(this.from)) {
			InternetAddress sentFrom = new InternetAddress(this.from);
			mimeMsg.setFrom(sentFrom); // 设置发送人地址
		}

		InternetAddress[] sendTo = new InternetAddress[toEmails.length];
		for (int i = 0; i < toEmails.length; i++) {
			sendTo[i] = new InternetAddress(toEmails[i]);
		}

		mimeMsg.setRecipients(MimeMessage.RecipientType.TO, sendTo);
		mimeMsg.setSubject(subject, Charset.defaultCharset().name());

		MimeBodyPart messageBodyPart1 = new MimeBodyPart();
		messageBodyPart1.setContent(content, mimeType);

		Multipart multipart = new MimeMultipart();// 附件传输格式
		multipart.addBodyPart(messageBodyPart1);
		if (fileNames != null) {
			for (int i = 0; i < fileNames.length; i++) {
				MimeBodyPart messageBodyPart2 = new MimeBodyPart();
				String[] strings = fileNames[i].split(",");
				// 选择出每一个附件名
				String fileName = strings[0];
				String displayName = strings[1];
				// 得到数据源
				FileDataSource fds = new FileDataSource(fileName);
				// 得到附件本身并至入BodyPart
				messageBodyPart2.setDataHandler(new DataHandler(fds));
				// 得到文件名同样至入BodyPart
				messageBodyPart2.setFileName(MimeUtility
						.encodeText(displayName));
				multipart.addBodyPart(messageBodyPart2);
			}
		}
		mimeMsg.setContent(multipart);
		// 设置信件头的发送日期
		mimeMsg.setSentDate(new Date());
		mimeMsg.saveChanges();
		// 发送邮件
		Transport.send(mimeMsg);
	}

	/**
	 * 关闭连接
	 */
	public void close()  {
		try {
			transport.close();
		} catch (MessagingException e) {
			throw new MailException("关闭连接出错",e);
		}
	}

	/**
	 * 发送邮件（DEFAULT_MIME_TYPE）
	 * 
	 * @param toEmails
	 *            邮件接收地址列表
	 * @param subject
	 *            主题
	 * @param content
	 *            正文
	 * @param fileNames
	 *            附件列表（文件名,显示名称）. <code>null</code>表示无附件.
	 * 
	 * @throws MessagingException
	 * @throws UnsupportedEncodingException
	 *             如果读取附件或发送失败
	 */
	public void send(String[] toEmails, String subject, String content,
			String[] fileNames) throws MessagingException,
			UnsupportedEncodingException {
		this.send(toEmails, subject, content, fileNames, DEFAULT_MIME_TYPE);
	}

	/**
	 * 发送邮件（无附件，DEFAULT_MIME_TYPE）
	 * 
	 * @param toEmails
	 *            邮件接收地址列表
	 * @param subject
	 *            主题
	 * @param content
	 *            正文
	 * 
	 * @throws MessagingException
	 * @throws UnsupportedEncodingException
	 *             如果读取附件或发送失败
	 */
	public void send(String[] toEmails, String subject, String content)
			throws MessagingException, UnsupportedEncodingException {
		this.send(toEmails, subject, content, null, DEFAULT_MIME_TYPE);
	}

	/**
	 * 发送邮件（无正文，无附件，DEFAULT_MIME_TYPE）
	 * 
	 * @param toEmails
	 *            邮件接收地址列表
	 * @param subject
	 *            主题
	 * 
	 * @throws MessagingException
	 * @throws UnsupportedEncodingException
	 *             如果读取附件或发送失败
	 */
	public void send(String[] toEmails, String subject)
			throws MessagingException, UnsupportedEncodingException {
		this.send(toEmails, subject, "", null, DEFAULT_MIME_TYPE);
	}
}

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

/**
 * 邮件服务器验证
 */
public class MailAutherticator extends Authenticator {
	private String username;
	private String userpass;

	public void setUsername(String username) {
		this.username = username;
	}

	public void setUserpass(String userpass) {
		this.userpass = userpass;
	}

	public MailAutherticator(String username, String userpass) {
		super();
		setUsername(username);
		setUserpass(userpass);
	}

	public PasswordAuthentication getPasswordAuthentication() {
		return new PasswordAuthentication(username, userpass);
	}
}