JavaMail发送邮件(带附件)

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import javax.activation.*;
public class SendMail2 {
  
 private String host = "";  //smtp服务器
 private String from = "";  //发件人地址
 private String to = "";    //收件人地址
 private String affix = ""; //附件地址
 private String affixName = ""; //附件名称
 private String user = "";  //用户名
 private String pwd = "";   //密码
 private String subject = ""; //邮件标题
 
 public void setAddress(String from,String to,String subject){
  this.from = from;
  this.to   = to;
  this.subject = subject;
 }
 
 public void setAffix(String affix,String affixName){
  this.affix = affix;
  this.affixName = affixName;
 }
 
    public void send(String host,String user,String pwd) {
     this.host = host;
  this.user = user;
  this.pwd  = pwd;
      
        Properties props = new Properties();
      
        //设置发送邮件的邮件服务器的属性(这里使用网易的smtp服务器)
        props.put("mail.smtp.host", host);
        //需要经过授权,也就是有户名和密码的校验,这样才能通过验证(一定要有这一条)
        props.put("mail.smtp.auth", "true");
      
        //用刚刚设置好的props对象构建一个session
        Session session = Session.getDefaultInstance(props);
      
        //有了这句便可以在发送邮件的过程中在console处显示过程信息,供调试使
        //用(你可以在控制台(console)上看到发送邮件的过程)
        session.setDebug(true);
      
        //用session为参数定义消息对象
        MimeMessage message = new MimeMessage(session);
        try{
         //加载发件人地址
            message.setFrom(new InternetAddress(from));
           //加载收件人地址
            message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
           //加载标题
            message.setSubject(subject);
          
            // 向multipart对象中添加邮件的各个部分内容,包括文本内容和附件
            Multipart multipart = new MimeMultipart();         
          
          
            //   设置邮件的文本内容
            BodyPart contentPart = new MimeBodyPart();
            contentPart.setText("邮件的具体内容在此");
            multipart.addBodyPart(contentPart);
            //添加附件
            BodyPart messageBodyPart= new MimeBodyPart();
            DataSource source = new FileDataSource(affix);
            //添加附件的内容
            messageBodyPart.setDataHandler(new DataHandler(source));
            //添加附件的标题
            //这里很重要,通过下面的Base64编码的转换可以保证你的中文附件标题名在发送时不会变成乱码
            sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
            messageBodyPart.setFileName("=?GBK?B?"+enc.encode(affixName.getBytes())+"?=");
            multipart.addBodyPart(messageBodyPart);
          
          
            //将multipart对象放到message中
            message.setContent(multipart);
            //保存邮件
            message.saveChanges();
            //   发送邮件
            Transport transport = session.getTransport("smtp");
            //连接服务器的邮箱
            transport.connect(host, user, pwd);
            //把邮件发送出去
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
        }catch(Exception e){
            e.printStackTrace();
        }
    }  
  
    public static void main(String[] args){
     SendMail2 cn = new SendMail2();
     //设置发件人地址、收件人地址和邮件标题
     cn.setAddress("[email protected]","[email protected]","一个带附件的JavaMail邮件");
     //设置要发送附件的位置和标题
     cn.setAffix("d:/cafe.gif","咖啡.gif");
     //设置smtp服务器以及邮箱的帐号和密码
     cn.send("smtp.163.com","shw","wwx1981");
    
    }
}

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