邮件发送（基础知识最为要命）

package com.fww.mail;

import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

public class JavaMailSendUtil {

        props = java.lang.System.getProperties(); // 获得系统属性对象  
        String text, String[] filenames, String mimeType) {  
    try {  
        Properties props = new Properties();  

        String smtp = "smtp.163.com"; // 设置发送邮件所用到的smtp  
        String servername = "**@163.com";  //邮箱账号名
        String serverpaswd = "**";  //邮箱密码

        javax.mail.Session mailSession = null; // 邮件会话对象  
        javax.mail.internet.MimeMessage mimeMsg = null; // MIME 邮件对象  

        props = java.lang.System.getProperties(); // 获得系统属性对象  
        props.put("mail.smtp.host", smtp); // 设置SMTP主机  
        props.put("mail.smtp.auth", "true"); // 是否到服务器用户名和密码验证  
        // 到服务器验证发送的用户名和密码是否正确  
        SmtpAuthenticator myEmailAuther = new SmtpAuthenticator(servername,  
                serverpaswd);  
        // 设置邮件会话 注意这里将认证信息放进了Session的创建参数里  
        mailSession = javax.mail.Session.getInstance(props,  
                (Authenticator) myEmailAuther);  
        // 设置传输协议  
        javax.mail.Transport transport = mailSession.getTransport("smtp");  
       // 设置from、to等信息  
       mimeMsg = new javax.mail.internet.MimeMessage(mailSession);  
       if (null != from && !"".equals(from)) {  
           InternetAddress sentFrom = new InternetAddress(from);  
           mimeMsg.setFrom(sentFrom); // 设置发送人地址  
       }  

       InternetAddress[] sendTo = new InternetAddress[to.length];  
       for (int i = 0; i < to.length; i++) {  
           System.out.println("发送到:" + to[i]);  
           sendTo[i] = new InternetAddress(to[i]);  
       }  

       mimeMsg.setRecipients(  
               javax.mail.internet.MimeMessage.RecipientType.TO, sendTo);  
       mimeMsg.setSubject(subject, "gb2312");  

       MimeBodyPart messageBodyPart1 = new MimeBodyPart();  
       // messageBodyPart.setText(UnicodeToChinese(text));  
       messageBodyPart1.setContent(text, mimeType);  

       // 附件传输格式  
       Multipart multipart = new MimeMultipart();  
       multipart.addBodyPart(messageBodyPart1);  

       for (int i = 0; i < filenames.length; i++) {  
           MimeBodyPart messageBodyPart2 = new MimeBodyPart();  

           String filename = filenames[i].split(";")[0];  
           String displayname = filenames[i].split(";")[1];  
           // 得到数据源  
           FileDataSource fds = new FileDataSource(filename);  
           // BodyPart添加附件本身  
           messageBodyPart2.setDataHandler(new DataHandler(fds));  
           // BodyPart添加附件文件名  
           messageBodyPart2.setFileName(MimeUtility  
                   .encodeText(displayname));  
           multipart.addBodyPart(messageBodyPart2);  
       }  
       mimeMsg.setContent(multipart);  
       // 设置信件头的发送日期  
       mimeMsg.setSentDate(new Date());  
       mimeMsg.saveChanges();  
       // 发送邮件  
       transport.send(mimeMsg);  
       transport.close();  
       System.out.println("发送到成功!!!");  
   } catch (Exception e) {  
       e.printStackTrace();  
   }  

}

public static void main(String[] args) throws Exception {

   String title = "测试邮件";// 所发送邮件的标题  
   String from = "**@163.com";// 从那里发送  
   String sendTo[] = { "**@qq.com","**@sina.com" };// 发送到那里  
   // 邮件的文本内容，可以包含html标记则显示为html页面  
   String content = "test java send mail !!!!!!<br><a href='www.baidu.com'>你好啊</a>";  
 // 所包含的附件，及附件的重新命名  
 String fileNames[] = { "d:\\test.jpg;test.jpg","d:\\test.zip;aaa.zip" };  

 JavaMailSendUtil test = new JavaMailSendUtil();  
 try {  
     // MailSender mailsender = new MailSender();  
     test.sendmail(title, from, sendTo, content, fileNames,  
             "text/html;charset=gb2312");  
 } catch (Exception ex) {  
     ex.printStackTrace();  
 }  

}

class SmtpAuthenticator extends Authenticator {

 String username = null;  
 String password = null;  


 public SmtpAuthenticator(String username, String password) {  
     super();  
     this.username = username;  
     this.password = password;  
 }  


 public PasswordAuthentication getPasswordAuthentication() {  
     return new PasswordAuthentication(this.username, this.password);  
   }  

}
}