邮件发送程序（可以同时发给多个地址、可以带附件）

发送邮件的主程序

import java.util.Properties;
import common.util.Email_Autherticatorbean;
import javax.mail.Authenticator;
import javax.mail.internet.InternetAddress;
import org.apache.commons.lang.StringUtils;
import javax.mail.internet.MimeBodyPart;
import javax.mail.Multipart;
import javax.activation.FileDataSource;
import javax.mail.internet.MimeMultipart;
import javax.activation.DataHandler;
import javax.mail.internet.MimeUtility;
import java.util.Date;

/**
 * 利用java.mail的邮件发送程序
 */

public class SendMailTest
{
  public static void main(String[] args)
  {
    String title = "titleTest";//所发送邮件的标题
    String from ="[email protected]";//从那里发送
    String sendTo[] = {"[email protected]","[email protected]"};//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 = "mail test!!!!!!<br><a href=#>aaa</a>";
    //所包含的附件，及附件的重新命名
    String fileNames[] = {"F:\\music\\text1.txt,text1.txt","F:\\music\\text2.txt,text2.txt"};
    try {
    //  MailSender mailsender = new MailSender();
      sendmail(title, from, sendTo, content, fileNames,"text/html;charset=gb2312");
      } catch (Exception ex) { ex.printStackTrace(); }
  }

  public static void sendmail(String subject, String from, String[] to, String text, String[] filenames,String mimeType) throws Exception
  {
    //ResourceBundle mailProps = ResourceBundle.getBundle("mail");   可以从配置文件读取相应的参数
    Properties props = new Properties();

    String smtp = "smtp.163.com";  //设置发送邮件所用到的smtp
    String servername = "sir_znp";
    String serverpaswd = "123";

    javax.mail.Session mailSession; //邮件会话对象
    javax.mail.internet.MimeMessage mimeMsg; //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
    Email_Autherticatorbean myEmailAuther = new Email_Autherticatorbean(servername, serverpaswd);
    //设置邮件会话
    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 (!StringUtils.isEmpty(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);

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

    for (int i = 0; i < filenames.length; i++) {
      MimeBodyPart messageBodyPart2 = new MimeBodyPart();
      //选择出每一个附件名
      String filename = filenames[i].split(",")[0];
      System.out.println("附件名：" + filename);
      String displayname = filenames[i].split(",")[1];
      //得到数据源
      FileDataSource fds = new FileDataSource(filename);
      //得到附件本身并至入BodyPart
      messageBodyPart2.setDataHandler(new DataHandler(fds));
      //得到文件名同样至入BodyPart
      //messageBodyPart2.setFileName(displayname);
      // messageBodyPart2.setFileName(fds.getName());
      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();
  }

}

验证类
package common.util;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
public class Email_Autherticatorbean  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 Email_Autherticatorbean(String username, String userpass)
{
   super();
   setUsername(username);
   setUserpass(userpass);

}
public PasswordAuthentication getPasswordAuthentication()
{

  return new PasswordAuthentication(m_username,m_userpass);
}
}

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