java使用javax.mail包发送电子邮件：设置账号、密码、主题、文本、附件

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public static void main(String[] args){
      Mail sendmail = new Mail();
      sendmail.setHost("smtp.163.com");
      sendmail.setUserName("aaaaaaaaa@163.com");
      sendmail.setPassWord("aaaaaaaaa");
      sendmail.setTo("aaaaaaaaa@163.com");
      sendmail.setFrom("aaaaaaaaa@163.com");
      sendmail.setSubject("你好，这是测试！");
      sendmail.setContent("你好这是一个带多附件的测试！");    
      //Mail sendmail = new Mail("aaaaaaaaa@163.com","aaaaaaaaa@163.com","smtp.163.com","aaaaaaaaa","aaaaaaaaa","你好","胃，你好吗？");
      sendmail.attachfile("D:\test.jpg");
      sendmail.attachfile("D:\test.mp4");
      sendmail.sendMail();

     }

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package com.lp.app.net;

import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;


String to = "";//收件人
String from = "";//发件人
String host = "";//smtp主机
String username = "" ;
String password = "" ;
String filename = "";//附件文件名
String subject = "";//邮件主题
String content = "";//邮件正文
Vector file = new Vector();//附件文件集合

public Mail(){
}
//构造器，提供直接的参数传入
public Mail(String to,String from,String smtpServer,String username,String password,String subject,String content){
  this.to = to;
  this.from = from;
  this.host = smtpServer;
  this.username = username;
  this.password = password;
  this.subject = subject;
  this.content = content;
}
//设置邮件服务器地址
public void setHost(String host){
  this.host = host;
}
//设置登录服务器校验密码
public void setPassWord(String pwd){
  this.password = pwd;
}
//设置登录服务器校验用户
public void setUserName(String usn){
  this.username = usn;
}
//设置邮件发送目的邮箱
public void setTo(String to){
  this.to = to;
}
//设置邮件发送源邮箱
public void setFrom(String from){
  this.from = from;
}
//设置邮件主题
public void setSubject(String subject){
  this.subject = subject;
}
//设置邮件内容
public void setContent(String content){
  this.content = content;
}
//把主题转换为中文
public String transferChinese(String strText){
  try{
    strText = MimeUtility.encodeText(new String(strText.getBytes(), "GB2312"), "GB2312", "B");
  }catch(Exception e){
    e.printStackTrace();
  }
  return strText;
}
//往附件组合中添加附件
public void attachfile(String fname){
  file.addElement(fname);
}
//发送邮件
public boolean sendMail(){

  //构造mail session
  Properties props = System.getProperties();
  props.put("mail.smtp.host",host);
  props.put("mail.smtp.auth","true");
  Session session=Session.getDefaultInstance(props, new Authenticator(){
   public PasswordAuthentication getPasswordAuthentication(){
    return new PasswordAuthentication(username,password); 
   }
  });

  try {
    //构造MimeMessage 并设定基本的值
    MimeMessage msg = new MimeMessage(session);
    msg.setFrom(new InternetAddress(from));
    InternetAddress[] address={new InternetAddress(to)};
    msg.setRecipients(Message.RecipientType.TO,address);
    subject = transferChinese(subject);
    msg.setSubject(subject);

    //构造Multipart
    Multipart mp = new MimeMultipart();

    //向Multipart添加正文
    MimeBodyPart mbpContent = new MimeBodyPart();
    mbpContent.setText(content);
    //向MimeMessage添加（Multipart代表正文）
    mp.addBodyPart(mbpContent);

    //向Multipart添加附件
    Enumeration 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(fds.getName());
      //向MimeMessage添加（Multipart代表附件）
      mp.addBodyPart(mbpFile);

    }

    file.removeAllElements();
    //向Multipart添加MimeMessage
    msg.setContent(mp);
    msg.setSentDate(new Date());
    //发送邮件
    Transport.send(msg);

  } catch (MessagingException mex) {
    mex.printStackTrace();
    Exception ex = null;
    if ((ex=mex.getNextException())!=null){
      ex.printStackTrace();
    }
    return false;
  }
  return true;
 }

}