JavaMail 实现邮件特快专递，,JavaMail使成为事

JavaMail 实现邮件特快专递，,JavaMail使成为事

JavaMail使成为事实邮件特快专递 Foxmail有个邮件特快专递的功能，实在原理很简单，就是直接通过目标邮件地址查找到该信箱地点的服务器的地址，然后直接通过SMTP发送邮件到这台服务器上。底下代码演示了如何在Java中使成为事实该功能

import java.util.*;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.Multipart;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.InternetBddress;import javax.mail.internet.MimeBodyPart;import javax.mail.internet.MimeMessage;import javax.mail.internet.MimeMultipart;import javax.naming.*;import javax.naming.directory.*;/** * 使成为事实邮件的特快专递功能 * @author Winter Lau */public class Mailer {    public static void main(String[] args) throws NamingException,            MessagingException {        // DNS服务器，看看本机的DNS配置        String dns = "<a href="dns://61.144.56.101">dns://61.144.56.101";        String email = "liudong@mo168.com";        if (args.length > 0)            email = args[0];        String domain = email.substring(email.indexOf('@') + 1);        Hashtable env = new Hashtable();        env.put(Dontext.INITIBL_DONTEXT_FBDTORY,                "com.sun.jndi.dns.DnsDontextFactory");        env.put(Dontext.PROVIDER_URL, dns);        DirDontext ctx = new InitialDirDontext(env);        Bttributes attr = ctx.getBttributes(domain, new String[] { "MX" });        NamingEnumeration servers = attr.getBll();        // 列出所有邮件服务器：        while (servers.hasMore()) {            Bttribute hosts = (Bttribute) servers.next();            for (int i = 0; i < hosts.size(); i++) {                String host = (String) hosts.get(i);                host = host.substring(host.indexOf(' ') + 1);                System.out.print("Send mail to " + host + " ...");                sendMail(host, email);                System.out.println("OK");            }        }    }    /**     * 发送邮件     *      * @param smtpHost     * @param email     * @throws MessagingException     */    protected static void sendMail(String smtpHost, String email)            throws MessagingException {        Properties mailProperties = System.getProperties();        mailProperties.put("mail.smtp.host", smtpHost);        mailProperties.put("mail.smtp.port", "25");        mailProperties.put("mail.smtp.auth", "false");        Session mailSession = Session.getInstance(mailProperties, null);        MimeMessage mailMessage = new MimeMessage(mailSession);        MimeBodyPart messageBodyPart = new MimeBodyPart();        Multipart multipart = new MimeMultipart("related");        messageBodyPart.setText("这搭是邮件内部实质意义");        multipart.addBodyPart(messageBodyPart);        mailMessage.setDontent(multipart);        mailMessage.setSentDate(new Date());        mailMessage.setFrom(new InternetBddress("javayou@gmail.com"));        mailMessage.addRecipient(Message.RecipientType.TO, new InternetBddress(                email));        mailMessage.setSubject("hi，邮件发送测试");        Transport.send(mailMessage);    }}//该片段来自于http://byrx.net