java mail

public class Mail {
	
	private final String SSL_FACTORY  =  "javax.net.ssl.SSLSocketFactory";
	private String host = null;				//服务器
	private int port = 25;					//端口
	private String auth = null;				//权限
	private String username = null;			//用户邮箱
	private String password = null;			//密码
	private boolean mailusername = false;	//是否显示个人名称
	private Session session = null;			//会话
	
	/**
	 * 线程池
	 */
	ThreadPoolExecutor executor = null;{
		executor = new ThreadPoolExecutor(1, Integer.MAX_VALUE, 60, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(5));
	}
	
	/**
	 * 此方法描述的是：初始化邮件服务
	 * @param mails
	 */
	@SuppressWarnings("unchecked")
	public Mail(Map<String,String> mails) {
		this.host = mails.get("server");					//服务器
		int tempPort = Common.toDigit(mails.get("port"));	//端口
		if(tempPort > 0){
			this.port = tempPort;
		}
		this.auth = mails.get("auth");						//权限
		this.username=mails.get("auth_username");			//权限名
		this.password=mails.get("auth_password");			//权限密码
		if("1".equals(mails.get("mailusername"))){
			this.mailusername = true;
		}
	}
	
	/**
	 * 此方法描述的是：初始化邮件服务
	 * @param host	服务器
	 * @param port	端口
	 * @param auth	权限
	 * @param username	用户名
	 * @param password	密码
	 * @param mailusername	是否显示个人名称
	 */
	public Mail(String host, int port, String auth, String username, String password, String mailusername) {
		this.host = host;
		if(port > 0){
			this.port=port;
		}
		this.auth = auth;
		this.username = username;
		this.password = password;
		if("1".equals(mailusername)){
			this.mailusername = true;
		}
	}


	/**
	 * 此方法描述的是：创建会话
	 */
	private synchronized void createSession() {
		Properties mailProps = new Properties();
		mailProps.setProperty("mail.transport.protocol", "smtp"); 			//协议
		mailProps.setProperty("mail.smtp.host",  host);						//主机
		mailProps.setProperty("mail.smtp.port", String.valueOf(port));		//端口
	  
		if("smtp.gmail.com".equals(host)){
			mailProps.setProperty("mail.smtp.socketFactory.class",  SSL_FACTORY);
			mailProps.setProperty("mail.smtp.socketFactory.fallback",  "false");
			mailProps.setProperty("mail.smtp.socketFactory.port",String.valueOf(port));
		}
		  
		if ("1".equals(auth)) {												//权限
			mailProps.put("mail.smtp.auth", "true");
		}
		
		//--默认初始化
		session = Session.getDefaultInstance(mailProps, new Authenticator() {
					protected PasswordAuthentication getPasswordAuthentication() {
						return new PasswordAuthentication(username, password);
					}
				});
	}

	/**
	 * 此方法描述的是：创建 MimeMessage
	 * @return
	 */
	private MimeMessage createMimeMessage() {
		if (session == null) {
			createSession();
		}
		return new MimeMessage(session);
	}
	
	/**
	 * 此方法描述的是：发送邮件
	 * @param from		发送邮件
	 * @param toEmail	目标邮件
	 * @param subject	标题
	 * @param textBody	内容
	 * @param htmlBody	html
	 * @return
	 */
	public String sendMessage(String from, String toEmail, String subject, String textBody, String htmlBody) {
		String result = null;
		try {
			String encoding = MimeUtility.mimeCharset(JspRunConfig.CHARSET);		 //编码
			MimeMessage message = createMimeMessage();								 //创建信息
			String toEmails[] = toEmail.split(",");									 //目标邮件组
			Address to[] = new Address[toEmails.length];							 //地址长度
			for (int i = 0; i<toEmails.length; i++) {
				String sTo = toEmails[i];
				if(sTo.matches("^.*<.*>$")){
					int index = sTo.indexOf("<");
					to[i] = new InternetAddress(sTo.substring(index+1,sTo.length()-1), mailusername?sTo.substring(0, index):"", encoding);
				}else{
					to[i] = new InternetAddress(sTo, "", encoding);
				}
			}
			String fromName = null;
			String fromEmail;
			if(from.matches("^.*<.*>$")){
				int index = from.indexOf("<");
				if(mailusername){
					fromName = from.substring(0, index);
				}
				fromEmail = from.substring(index+1,from.length()-1);
			}else{
				fromEmail = from;
			}
			Address fromAddress = new InternetAddress(fromEmail,fromName!=null?fromName:"", encoding);

			message.setHeader("Date", Common.gmdate("EEE, dd MMM yyyy HH:mm:ss Z", (int)(System.currentTimeMillis()/1000), "0"));
			message.setHeader("Content-Transfer-Encoding", "8bit");
			message.setRecipients(Message.RecipientType.TO, to);
			message.setFrom(fromAddress);
			message.setSubject(subject, encoding);
			MimeMultipart content = new MimeMultipart("alternative");
			if (textBody != null && htmlBody != null) {
				MimeBodyPart text = new MimeBodyPart();
				text.setText(textBody, encoding);
				text.setDisposition(Part.INLINE);
				content.addBodyPart(text);
				MimeBodyPart html = new MimeBodyPart();
				html.setContent(htmlBody, "text/html; charset="+encoding);
				html.setDisposition(Part.INLINE);
				content.addBodyPart(html);
			} else if (textBody != null) {
				MimeBodyPart text = new MimeBodyPart();
				text.setText(textBody, encoding);
				text.setDisposition(Part.INLINE);
				content.addBodyPart(text);
			} else if (htmlBody != null) {
				MimeBodyPart html = new MimeBodyPart();
				html.setContent(htmlBody, "text/html; charset="+encoding);
				html.setDisposition(Part.INLINE);
				content.addBodyPart(html);
			}
			message.setContent(content);
			message.setDisposition(Part.INLINE);
			addToTask(message);
		} catch (Exception e) {
			result=e.getMessage();
		}
		return result;
	}

	/**
	 * 此方法描述的是：添加线程
	 * @param message
	 */
	private void addToTask(MimeMessage message) {
		if (message != null) {
			sendMessages(Collections.singletonList(message));
		} else {
			System.out.println("Cannot add null email message to queue.");
		}

	}

	/**
	 * 此方法描述的是：发送邮件
	 * @param messages
	 */
	private void sendMessages(Collection<MimeMessage> messages) {
		if (messages.size() == 0) {
			return;
		}
		executor.execute(new EmailTask(messages));
	}

	/**
	 * 此文件描述的是：多线程邮件发送
	 * @author blaiu
	 *
	 */
	private class EmailTask implements Runnable {
		private Collection<MimeMessage> messages;
		public EmailTask(Collection<MimeMessage> messages) {
			this.messages = messages;
		}
		public void run() {
			try {
				sendMessages();
			} catch (MessagingException me) {
				me.printStackTrace();
				int timestamp =(int)(System.currentTimeMillis()/1000);
				Log.writelog("errorlog", timestamp, timestamp+"\tSMTP\t\t("+host+":"+port+") CONNECT - Unable to connect to the SMTP server");
			}
		}
		public boolean sendMessages() throws MessagingException {
			Transport transport = null;
			try {
				URLName url = new URLName("smtp", host, port, "", username, password);
				transport = new SMTPTransport(session, url);
				transport.connect(host, port, username, password);
				for (MimeMessage message : messages) {
					transport.sendMessage(message, message.getRecipients(MimeMessage.RecipientType.TO));
				}
				return true;
			} finally {
				if (transport != null) {
					transport.close();
				}
			}
		}
	}
}