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  1.   

    import java.io.*;
    import java.util.*;
    import javax.mail.*;
    import javax.mail.internet.*;/**
     * <p>Title: 简易MailBean</p>
     * <p>Description: 提供简便的Mail发送功能(/p>
     * <p>Copyright: Copyright (c) 2003</p>
     * @version 1.0
     */class ExtendString {
      public ExtendString() {
      }
      /**
       去掉字符串两端的空白字符,并将字符串转化为中国的标准字符gb2312的字符串.
       */
      public String CS(String str) { //去掉字符串2端的空白字符
          try {
              if (str == null)
                  return "";
              str = str.trim();
              if (str == null)
                  return "";
              str = new String(str.getBytes("8859_1"), "GBK");
          }
          catch (Exception e) {
              System.out.println(e);
          }
          return str;
      }}public class SendMail
    {
        private String errMsg = "";
        private ExtendString ExStr = new ExtendString();    private String sender = "";//发件人地址
        private String smtpHost = "";//邮件发送服务器(smtp)
        private String user = ""; //登录用户名
        private String password = "";//登录密码    private String subject = "";//mail主题    public SendMail()
        {
            this.setPropertiesAttri();
        }    private void setPropertiesAttri()
        {
            try
            {
                InputStream is = getClass().getResourceAsStream("MailServer.properties");
                Properties prop = new Properties();
                prop.load(is);            this.setSmtpHost(prop.get("SmtpHost").toString());
                this.setUser(prop.get("User").toString());
                this.setPassword(prop.get("Password").toString());
                this.setSender(prop.get("Sender").toString());
                this.setSubject(ExStr.CS(prop.get("Subject").toString()));
            }
            catch(Exception ex)
            {
                System.err.println("ex1 in sendmail.java:"+ex.toString());
            }
        }
        /** 设置发件人地址 */    public void setSender(String sender)
        {
            this.sender = sender;
        }    public String getSender()
        {
            return sender;
        }    /** 设置邮件发送服务器(smtp) */
        public void setSmtpHost(String smtpHost) {this.smtpHost = smtpHost;}
        public String getSmtpHost() {return smtpHost;}    /** 设置登录用户名 */
        public void setUser(String user)
        {
            this.user = user;
        }
        public String getUser()
        {
            return user;
        }    /** 设置登录密码 */
        public void setPassword(String password)
        {
            this.password = password;
        }
        public String getPassword()
        {
            return password;
        }    /** 设置mail主题 */
        public void setSubject(String subject)
        {
            this.subject = subject;
        }
        public String getSubject()
        {
            return subject;
        }    /**
         * 使用smtp发送邮件 主程序
         * @throws MessagingException mail发送失败
         */
        public void smtp(String receiver,String content) throws MessagingException
        {
            if (smtpHost == null) throw new MessagingException("smtpHost not found");
            if (user == null) throw new MessagingException("user not found");
            if (password == null) throw new MessagingException("password not found");        Properties properties = new Properties();
            properties.put("mail.smtp.host", smtpHost);//设置smtp主机
            properties.put("mail.smtp.auth", "true");//使用smtp身份验证        Session session = Session.getDefaultInstance(properties, 
                 new Authenticator(){
                   public PasswordAuthentication getPasswordAuthentication(){
                     return new PasswordAuthentication(user, password);
                   }
                 });        //获得邮件会话对象
            MimeMessage mimeMsg = new MimeMessage(session);//创建MIME邮件对象
            if (sender != null)//设置发件人地址
                {
                    mimeMsg.setFrom(new InternetAddress(sender));
                }
            if (receiver != null)//设置收件人地址
               {
                   mimeMsg.setRecipients(Message.RecipientType.TO, parse(receiver));
               }
            if (subject != null)//设置邮件主题
               {
                   mimeMsg.setSubject(subject, "GBK");
               }
            MimeBodyPart part = new MimeBodyPart();//mail内容部分
            part.setText(content == null ? "" : content, "GBK");        //设置邮件格式为html cqc
            part.setContent(content.toString(),"text/html;charset=GBK");
            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(part);//在 Multipart 中增加mail内容部分
            mimeMsg.setContent(multipart);//增加 Multipart 到信息体
            mimeMsg.setSentDate(new Date());//设置发送日期
            Transport.send(mimeMsg);//发送邮件
        }    /** 解析地址集合字符串 */
        private InternetAddress[] parse(String addressSet) throws AddressException
        {
            ArrayList list = new ArrayList();
            StringTokenizer tokens = new StringTokenizer(addressSet, ";");
            while (tokens.hasMoreTokens())
            {
                list.add(new InternetAddress(tokens.nextToken().trim()));
            }
            InternetAddress[] addressArray = new InternetAddress[list.size()];
            list.toArray(addressArray);
            return addressArray;
        }    /**
         *  供外部调用的接口
         */
       
        public boolean sendMails(String mail,String content)
        {
            int mailLen = 0 ;
            int contentLen= 0;
            if (mail == null||content==null)
            {
                return false;
            }            try
                {
                    this.smtp(mail,content);
                }
                catch(Exception ex)
                {
                    System.err.println("ex2 in sendmail.java:"+ex.toString());
                }        return true;
        }         public static void main (String[] args)
         {
             SendMail mail = new SendMail();
             String email = "[email protected];[email protected]";
             String content = "账号:123 密码:123 <br/>感谢您注册!<br/><a href='http://www.xxxx.com.cn' target='_blank'>www.xxxx.com.cn</a><br/>此致<br/>xxxx <br/>即日";
             try
             {
                 mail.sendMails(email,content);
             }
             catch (Exception ex)
             {
                System.err.println("ex33:"+ex.toString());
             }
         }
     }编译通过后,在class文件的目录下建立一个文本文件MailServer.properties,
    格式:
    SmtpHost=smtp.163.com
    User=user
    Password=pwd
    [email protected]
    Subject=Hello
      

  2.   

    http://www.javaresearch.org/article/showarticle.jsp?column=2&thread=12137
    http://www.javaresearch.org/article/showarticle.jsp?column=2&thread=15372