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!");
        }
    }
}