java发送邮件带附件

 package com.smtp;

 import java.util.Vector;

 public class MailBean {
     private String to; // 收件人
     private String from; // 发件人
     private String host; // SMTP主机
     private String username; // 发件人的用户名
     private String password; // 发件人的密码
     private String subject; // 邮件主题
     private String content; // 邮件正文
     Vector<String> file; // 多个附件
     private String filename; // 附件的文件名

     public String getTo() {
         return to;
     }

     public void setTo(String to) {
         this.to = to;
     }

     public String getFrom() {
         return from;
     }

     public void setFrom(String from) {
         this.from = from;
     }

     public String getHost() {
         return host;
     }

     public void setHost(String host) {
         this.host = host;
     }

     public String getUsername() {
         return username;
     }

     public void setUsername(String username) {
         this.username = username;
     }

     public String getPassword() {
         return password;
     }

     public void setPassword(String password) {
         this.password = password;
     }

     public String getSubject() {
         return subject;
     }

     public void setSubject(String subject) {
         this.subject = subject;
     }

     public String getContent() {
         return content;
     }

     public void setContent(String content) {
         this.content = content;
     }

     public String getFilename() {
         return filename;
     }

     public void setFilename(String filename) {
         this.filename = filename;
     }

     public Vector<String> getFile() {
         return file;
     }

     public void attachFile(String fileName) {
         if (file == null){
             file = new Vector<String>();
         }
         file.addElement(fileName);
     }
 }

 package com.smtp;

 import java.util.Date;
 import java.util.Enumeration;
 import java.util.Properties;
 import java.util.Vector;

 import javax.activation.DataHandler;
 import javax.activation.FileDataSource;
 import javax.mail.Authenticator;
 import javax.mail.Message;
 import javax.mail.MessagingException;
 import javax.mail.Multipart;
 import javax.mail.PasswordAuthentication;
 import javax.mail.Session;
 import javax.mail.Transport;
 import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeBodyPart;
 import javax.mail.internet.MimeMessage;
 import javax.mail.internet.MimeMultipart;
 import javax.mail.internet.MimeUtility;

 public class SendMail {

     public String toChinese(String text) {
         try {
             text = MimeUtility.encodeText(new String(text.getBytes(), "GB2312"), "GB2312", "B");
         } catch (Exception e) {
             e.printStackTrace();
         }
         return text;
     }

     public boolean sendMail(MailBean mb) {
         String host = mb.getHost();
         final String username = mb.getUsername();
         final String password = mb.getPassword();
         String from = mb.getFrom();
         String to = mb.getTo();
         String subject = mb.getSubject();
         String content = mb.getContent();
         String fileName = mb.getFilename();
         Vector<String> file = mb.getFile();

         Properties props = System.getProperties();
         props.put("mail.smtp.host", host); // 设置SMTP的主机
         props.put("mail.smtp.auth", "true"); // 需要经过验证

         Session session = Session.getInstance(props, new Authenticator() {
             public PasswordAuthentication getPasswordAuthentication() {
                 return new PasswordAuthentication(username, password);
             }
         });

         try {
             MimeMessage msg = new MimeMessage(session);
             msg.setFrom(new InternetAddress(from));
             InternetAddress[] address = { new InternetAddress(to) };
             msg.setRecipients(Message.RecipientType.TO, address);
             msg.setSubject(toChinese(subject));

             Multipart mp = new MimeMultipart();
             MimeBodyPart mbpContent = new MimeBodyPart();
             mbpContent.setText(content);
             mp.addBodyPart(mbpContent);

             /* 往邮件中添加附件 */
             if (file != null) {
                 Enumeration<String> efile = file.elements();
                 while (efile.hasMoreElements()) {
                     MimeBodyPart mbpFile = new MimeBodyPart();
                     fileName = efile.nextElement().toString();
                     FileDataSource fds = new FileDataSource(fileName);
                     mbpFile.setDataHandler(new DataHandler(fds));
                     mbpFile.setFileName(toChinese(fds.getName()));
                     mp.addBodyPart(mbpFile);
                 }
                 System.out.println("添加成功");
             }

             msg.setContent(mp);
             msg.setSentDate(new Date());
             Transport.send(msg);

         } catch (MessagingException me) {
             me.printStackTrace();
             return false;
         }
         return true;
     }

 }

 package com.smtp;

 public class TestJavaMail {

     public static void main(String[] args) {

         MailBean mb = new MailBean();
         mb.setHost("smtp.126.com"); // 设置SMTP主机(163)，若用126，则设为：smtp.126.com
         mb.setUsername("邮箱地址"); // 设置发件人邮箱的用户名
         mb.setPassword("邮箱密码"); // 设置发件人邮箱的密码，需将*号改成正确的密码
         mb.setFrom("设置发件人的邮箱"); // 设置发件人的邮箱
         mb.setTo("设置收件人的邮箱"); // 设置收件人的邮箱
         mb.setSubject("测试_JavaMail"); // 设置邮件的主题
         mb.setContent("本邮件中包含三个附件，请检查！"); // 设置邮件的正文

         mb.attachFile("往邮件中添加附件"); // 往邮件中添加附件
         mb.attachFile("往邮件中添加附件");
         mb.attachFile("往邮件中添加附件");

         SendMail sm = new SendMail();
         System.out.println("正在发送邮件...");
         // 发送邮件
         if (sm.sendMail(mb)){
             System.out.println("发送成功!");
         }else{
             System.out.println("发送失败!");
         }
     }
 }