import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import java.util.Date;
import javax.mail.Message.RecipientType;
import javax.mail.internet.MimeMessage;
import javax.mail.Message;
import javax.mail.Session;
import java.util.Properties;
import javax.mail.MessagingException;
import javax.mail.internet.MimeBodyPart;
import javax.mail.Multipart;
import javax.mail.internet.MimeMultipart;
import org.apache.log4j.Logger;
/** *//**
 * 发送Email类
 */

public class SendEmail ...{
  Logger logger=Logger.getLogger(this.getClass());
  /** *//**
   * Email发送方法
   * @param toemails 需要一个字符串参数，用来设置收件人地址，如果收件人为多个，则用","隔开
   * @param content 邮件内容
   * @param subject 邮件主题
   * @return 邮件成功发送则返回true,否则返回false
   */
  public boolean sendSimpleEmail(String toemails,String content,String subject)...{
    boolean result=false;
    logger.info("进入发送Email类");
      try ...{
        //创建属性对象
        Properties props = new Properties();
        //设置邮件传输协议为：smtp
        props.put("mail.transpost.protocol","smtp");
        //设置邮件服务器地址
        props.put("mail.smtp.host", "smtp.163.com");
        //设置邮件验证为真
        props.put("mail.smtp.auth", "true");
        //设置邮件服务器端口
        props.put("mail.smtp.port","25");

        //调用验证类进行验证,需要参数发件人用户名和密码
        logger.info("验证类实例化==============");
        CheckSendEmail auth=new CheckSendEmail("lip009","lip009");

        logger.info("验证通过");
        //创建session对象
        Session sendMailSession;
        sendMailSession = Session.getInstance(props, auth);
        //设置输出调试信息
        sendMailSession.setDebug(true);

        logger.info("开始创建消息对象");
        //创建信息对象
        Message newMessage = new MimeMessage(sendMailSession);

        //输入发送信息
        //设置发信人地址
        logger.info("设置发信人地址");
        newMessage.setFrom(new InternetAddress("link2friend@163.com"));

        //设置收信人地址，只支持单用户发送
//        newMessage.setRecipient(Message.RecipientType.TO,new InternetAddress("lip0091981@163.com"));

        //设置收信人地址，可以支持多用户发送
        logger.info("设置收信人地址");
        newMessage.setRecipients(Message.RecipientType.TO,
                                InternetAddress.parse(toemails));
       //附件
//==============================================================================
       //msgText是信件的正文，共有两行
//       String msgText = content;

       //msgAttachment是一段字符串作为附件内容
//       String msgAttachment = "This is an attachment string!";

//       MimeBodyPart mbp1 = new MimeBodyPart();

//       mbp1.setText(msgText); //把前面定义的msgText中的文字设定为邮件正文的内容

       //创建附件部分
//       MimeBodyPart mbp2 = new MimeBodyPart();

       //使用setText(text, charset)来加入附件
//       mbp2.setText(msgAttachment, "gb2312");

       //创建Multipart
//       Multipart mp = new MimeMultipart();

//       mp.addBodyPart(mbp1);
//       mp.addBodyPart(mbp2);

       // 添加 Multipart到Message中
//       newMessage.setContent(mp);
//==============================================================================
        //设置信件文本格式（当设置了附件，这里就不能有）
        logger.info("设置格式");
        newMessage.setContent("SendMail", "text/html");

        //设置信件主题
        logger.info("设置主题");
        newMessage.setSubject(subject);

        //设置信件发送日期
        logger.info("设置发送日期");
        newMessage.setSentDate(new Date());

        //设置信件正文（当设置了附件，这里就不能有）
        newMessage.setText(content);
        logger.info("设置完消息");
        //创建对象
        Transport transport;
        transport = sendMailSession.getTransport("smtp");
        logger.info("将要发送");

        //发送
        result=true;
        transport.send(newMessage);//此处总是抛出异常，让人很是郁闷，但是邮件却发送成功！
        logger.info("恭喜你！您的邮件已经成功发送！");
      }
      catch (MessagingException ex) ...{
//        ex.printStackTrace();
      }
      return result;
  }
}

import javax.mail.*;

/** *//**
 * Email发送帐号密码验证类
 */

public class CheckSendEmail extends Authenticator...{
  private String m_username = null;
  private String m_userpass = null;
  public void setUsername(String username)
     {
      m_username = username;
  }
  public void setUserpass(String userpass)
     {
      m_userpass = userpass;
  }
  public CheckSendEmail(String username, String userpass)
     {
      super();
      setUsername(username);
      setUserpass(userpass);
  }
  public PasswordAuthentication getPasswordAuthentication()
      {
      return new PasswordAuthentication(m_username,m_userpass);
  }
}