javaMail实现邮件发送，群发功能

 邮件系统很简单哦，只有下面两个类： 
MailBean 和 SendMailOnTime 
需要jar组件： 
activation.jar 
mail.jar 
log4j.jar 

代码如下：

 /*
   * Created on 2005-9-7
   *
   * TODO To change the template for this generated file go to
   * Window - Preferences - Java - Code Style - Code Templates
   *
   * Update on 2008-8-14
   */
 package javaMail;

 import javax.mail.MessagingException;
 import javax.mail.Session;
 import javax.mail.Transport;
 import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeMessage;

 import org.apache.log4j.Logger;



 /**
   * @author panshengti 类功能 : 处理意见反馈邮件发送 调用 jar:activation.jar 、 mail.jar
   */

 public class MailBean {

     public static Logger log = null ;
     static {
        log = Logger.getLogger (MailBean. class );
     }

     // smtpHost 发件人所用到的 smtp 服务器
     String smtpHost = "smtp.163.com" ;
     // from 发件人邮箱
     String from = "[email protected]" ;
     // to 收件人邮箱
     String to = "[email protected]" ;
     // subject 邮件标题
     String subject = "receive a mail from [email protected]" ;
     // theMessage 邮件内容
     StringBuffer theMessage = new StringBuffer();

     /**
       * 固定的给 [email protected] ,[email protected] 发送邮件
       * create date:2008- 8- 15
       * author:Administrator
       *
       * @param smtpHost
       * @param from
       * @param subject
       * @param messageText
       * @throws MessagingException
       */
     public void sendMessage(String smtpHost, String from,
            String subject, String messageText) throws MessagingException {
        SmtpAuth sa = new SmtpAuth();
        sa.getuserinfo( "d-ear" , "123abc" );
        java.util.Properties props = new java.util.Properties();
        props.put( "mail.smtp.auth" , "true" );
        props.put( "mail.smtp.host" , smtpHost);
        System. out .println( "Constructing message- from=" + from + " to=" + to );
        InternetAddress fromAddress = new InternetAddress(from);
        InternetAddress[] toAddresss = new InternetAddress[2];
        toAddresss[0] = new InternetAddress( "[email protected]" );
        toAddresss[1] = new InternetAddress( "[email protected]" );
        int i = 0;
        while (i < toAddresss. length ) {
            Session mailSession = Session.getDefaultInstance (props, sa);
            MimeMessage testMessage = new MimeMessage(mailSession);
            testMessage.setFrom(fromAddress);
            testMessage.addRecipient(javax.mail.Message.RecipientType. TO ,
                   toAddresss[i]);
            testMessage.setSentDate( new java.util.Date());
            testMessage.setSubject(subject);
            testMessage.setText(messageText);

            Transport.send (testMessage);
            System. out .println( "A mail have been sent!" );
            i++;
        }
     }

     /*
       * 由 163 服务器向目的邮箱发送邮件
       * 邮件发送处理 @param stmHost,from,to,subject,messageText
       */

     public void sendMessage(String smtpHost, String from, String to,
            String subject, String messageText) throws MessagingException {
        SmtpAuth sa = new SmtpAuth();
        sa.getuserinfo( "d-ear" , "123abc" );
        java.util.Properties props = new java.util.Properties();
        props.put( "mail.smtp.auth" , "true" );
        props.put( "mail.smtp.host" , smtpHost);
        System. out .println( "Constructing message- from=" + from + " to=" + to);
        InternetAddress fromAddress = new InternetAddress(from);
        InternetAddress toAddresss = new InternetAddress(to);


            Session mailSession = Session.getDefaultInstance (props, sa);
            MimeMessage testMessage = new MimeMessage(mailSession);
            testMessage.setFrom(fromAddress);
            testMessage.addRecipient(javax.mail.Message.RecipientType. TO ,
                   toAddresss);
            testMessage.setSentDate( new java.util.Date());
            testMessage.setSubject(subject);
            testMessage.setText(messageText);

            Transport.send (testMessage);
            System. out .println( "A mail have been sent to " + to);

     }

     /**
       * 功能：群发功能 , 把所有的目的邮箱作为一个数组参数传入
       * create date:2008- 8- 15
       * author:Administrator
       *
       * @param smtpHost
       * @param from
       * @param to 目的邮箱数组
       * @param subject
       * @param messageText
       * @throws MessagingException
       */
     public void sendMessage(String smtpHost, String from, String[] to,
            String subject, String messageText) throws MessagingException {
        SmtpAuth sa = new SmtpAuth();
        sa.getuserinfo( "d-ear" , "123abc" );
        java.util.Properties props = new java.util.Properties();
        props.put( "mail.smtp.auth" , "true" );
        props.put( "mail.smtp.host" , smtpHost);
        System. out .println( "Constructing message- from=" + from + " to=" + to);
        InternetAddress fromAddress = new InternetAddress(from);

        InternetAddress[] toAddresss = new InternetAddress[to. length ];
        for ( int len=0;len<to. length ;len++){
            toAddresss[0] = new InternetAddress(to[len]);
        }

        int i = 0;
        while (i < toAddresss. length ) {
            Session mailSession = Session.getDefaultInstance (props, sa);
            MimeMessage testMessage = new MimeMessage(mailSession);
            testMessage.setFrom(fromAddress);
            testMessage.addRecipient(javax.mail.Message.RecipientType. TO ,
                   toAddresss[i]);
            testMessage.setSentDate( new java.util.Date());
            testMessage.setSubject(subject);
            testMessage.setText(messageText);

            Transport.send (testMessage);
            System. out .println( "A mail have been sent to " +to[i]);
            i++;
        }
     }
     /*
       * 邮件用户名和密码认证
       */
     static class SmtpAuth extends javax.mail.Authenticator {
        private String user , password ;

        public void getuserinfo(String getuser, String getpassword) {
            user = getuser;
            password = getpassword;
        }

        protected javax.mail.PasswordAuthentication getPasswordAuthentication() {
            return new javax.mail.PasswordAuthentication( user , password );
        }
     }

 }


 package javaMail;

 import javax.mail.MessagingException;

 import org.apache.log4j.Logger;

 public class SendMailOnTime {

     public static Logger log = null ;
     static {
        log = Logger.getLogger (SendMailOnTime. class );
     }

     /**
       * @param args
       */
     public static void sendMail(String str) {

        MailBean mail = new MailBean();
        try {
            mail.sendMessage( "smtp.163.com" , "[email protected]" ,
                   "rent information" , str);
        } catch (MessagingException e) {
            System. out .println( "mail send error !" );
            log .debug( "mail send error !" + e.getMessage());
            e.printStackTrace();
        }
        System. out .println( "Mail have been sended ." );
     }

     /**
       * 给一个指定邮箱发送指定的邮件内容 create date:2008- 8- 15 author:Administrator
       *
       * @param str
       */
     public static void sendMail(String toMail, String content) {

        MailBean mail = new MailBean();
        try {
            mail.sendMessage( "smtp.163.com" , "[email protected]" , toMail,
                   "spider information" , content);
        } catch (MessagingException e) {
            System. out .println( "mail send error !" );
            log .debug( "mail send error !" + e.getMessage());
            e.printStackTrace();
        }
        System. out .println( "Mail have been sended ." );
     }

     /**
       * 指定目的邮箱数组进行群发 create date:2008- 8- 15 author:Administrator
       *
       * @param toMail
       * @param content
       */
     public static void sendMail(String[] toMail, String content) {

        MailBean mail = new MailBean();
        try {
            mail.sendMessage( "smtp.163.com" , "[email protected]" , toMail,
                   "spider information" , content);
        } catch (MessagingException e) {
            System. out .println( "mail send error !" );
            log .debug( "mail send error !" + e.getMessage());
            e.printStackTrace();
        }
        System. out .println( "Mail have been sended ." );
     }

 }