简单的邮件发送mail.jar

public class MailSender {
    final static Logger logger = Logger.getLogger(MailSender.class);
    /**
     * 发送简单邮件
     * @param str_from：发件人地址
     * @param str_to:收件人地址
     * @param str_title：邮件标题
     * @param str_content：邮件正文
     * @param emailPwd：邮件密码
     */
    @SuppressWarnings("finally")
    public static void send(String str_to, String str_title,String str_content){
         boolean flog=false;
        logger.info("sending... To: " + str_to + " Mail Title: " + str_title + " fileAttachment: " + str_content);
            Properties props = new Properties();
            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

            try {
                props.load(classLoader.getResourceAsStream("mail.properties"));   //使用property读取文件
            } catch (IOException e) {
                e.printStackTrace();
            }
            String str_from = props.getProperty("mail.from");
            String emailPwd = props.getProperty("mail.password");

            final String mailServer_163 = props.getProperty("mail.smtp.163.mailServer");
            final String mailServer_qq = props.getProperty("mail.smtp.qq.mailServer");
            final String mailServer_Sina = props.getProperty("mail.smtp.sina.mailServer");
            String mailServer = "";
            String emailType = Tools.subString(str_from, "@"); //截取@前
            String eName = Tools.subberString(str_from,"@");
            if (emailType.trim() != "" && emailType.equals("qq.com")) {
                mailServer = mailServer_qq;
            }
            if (emailType.trim() != "" && emailType.equals("163.com")) {
                mailServer = mailServer_163;
            }
            if (emailType.trim() != "" && emailType.equals("sina.com.cn")) {
                mailServer = mailServer_Sina;
            }
            if (emailType.trim() != "" && emailType.equals("sina.com")) {
                mailServer = mailServer_Sina;
            }
           // 存储发送邮件服务器的信息
            props.put("mail.smtp.host", mailServer);
            // 同时通过验证
            props.put("mail.smtp.auth", "true");
            // 根据属性新建一个邮件会话
            Session s = Session.getInstance(props);
            s.setDebug(true); // 有他会打印一些调试信息。
            // 由邮件会话新建一个消息对象
            MimeMessage message = new MimeMessage(s);
            // 设置邮件
            InternetAddress from = null;
            try {
                from = new InternetAddress(str_from);
            } catch (AddressException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } // [e-mail]
            try {
                message.setFrom(from);
            } catch (MessagingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } // 设置发件人的地址
            // //设置收件人,并设置其接收类型为TO
            InternetAddress to = null;
            try {
                to = new InternetAddress(str_to);
            } catch (AddressException e) {
                e.printStackTrace();
            }
            try {
                message.setRecipient(Message.RecipientType.TO, to);
                // 设置标题
                message.setSubject(str_title); // java学习
                // 设置信件内容
                // message.setText(str_content); //发送文本邮件 //你好吗？
                message.setContent(str_content, "text/html;charset=gbk"); // 发送HTML邮件
                // 设置发信时间
                message.setSentDate(new Date());
                // 存储邮件信息
                message.saveChanges();
            } catch (MessagingException e) {
                e.printStackTrace();
            }

            // 发送邮件
            Transport transport = null;
            try {
                transport = s.getTransport("smtp");
            } catch (NoSuchProviderException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            // 以smtp方式登录邮箱,第一个参数是发送邮件用的邮件服务器SMTP地址,第二个参数为用户名,第三个参数为密码
            try {
                transport.connect(mailServer, eName, emailPwd) ;
            } catch (MessagingException e) {
                e.printStackTrace();
            }
            // 发送邮件,其中第二个参数是所有已设好的收件人地址
            try {
                transport.sendMessage(message, message.getAllRecipients());
            } catch (MessagingException e) {
                e.printStackTrace();
            }
            try {
                transport.close();
            } catch (MessagingException e) {
                e.printStackTrace();
            }   

    }

    /**
     * 异步发送邮件的方法*/
    public static void sendMailByAsynchronous(final String str_to, final String str_title, final String str_content) throws Exception{
        new Thread(new Runnable() {
            public void run() {
                try {
                    MailSender.send(str_to, str_title, str_content);
                } catch (Exception ex) {
                    logger.error("mail sender error To: " + str_to
                            + " Mail Title: " + str_title + " fileAttachment: "
                            + str_content, ex);
                }
            }
        }).start();
    }

}

 mail.properties

mail.smtp.163.mailServer=smtp.163.com

mail.smtp.qq.mailServer=smtp.qq.com

mail.smtp.sina.mailServer=smtp.sina.com.cn

mail.username=asd

mail.password=123456

mail.from=[e-mail]

 Tool.java

public class Tools {
	public static String subString(String content,String start){
		String subConetent=content.substring(content.indexOf(start)+1, content.length());
		return subConetent;
	}
	public static String subberString(String content,String end){
		String subConetent=content.substring(0,content.indexOf(end));
		return subConetent;
	}
}

调用方法：

MailSender.sendMailByAsynchronous("[e-mail]","topic："+a.getAskTitle(), "content："+a.getAskContent()+"/n请你及时回复");

jar包：mai.jar