javamail使用方法

首先需要下载两个jar包，

一个是mail.jar，下载地址：http://www.javasoft.com/products/javamail/

另一个是activation.jar包，地址：http://java.sun.com/beans/glasgow/jaf.html

并设置到classpath中，

基本代码如下

package groupsms;

import java.util.Properties;
import java.util.Date;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
//import SendMail.Email_Autherticatorbean;

/**
 *
 * @author sweater
 * @version 1.0, 09/01/04
 * @since   JDK1.4.2
 *
 * 利用JavaMail，发送电子邮件
 *
 */
public class SendMail{
 public String to;
 public String from;
 public String subject;
 public String mailhost;
 public String content;
 public String user;
 public String password;
 public String cc;
 public String bcc;
 
    public SendMail(String to,String from,String subject,String mailhost,
                    String content,String user,String password,String cc,
                    String bcc){
  this.to = to;
  this.from = from;
  this.subject = subject;
  this.mailhost = mailhost;
  this.content = content;
  this.user = user;
  this.password = password;
  this.cc = cc;
  this.bcc = bcc;
  
       /*
     System.out.println(user);
     System.out.println(password);
     System.out.println(subject);
     System.out.println(mailhost);
     System.out.println(to);
     System.out.println(from);
  */
 }
  
  
 public int sendMailBySMTP(){
  int flag = -1;
  //MIME邮件对象
  MimeMessage mimeMsg = null;
        //邮件会话对象
  Session session = null;
  try {
   Properties props = System.getProperties();  //获得系统属性
   props.put("mail.smtp.host", mailhost);      //设置SMTP主机
   props.put("mail.smtp.auth","true");         //设置身份验证为真，若须身份验证则必须设为真

   //获得邮件会话对象
   //session = Session.getDefaultInstance(props,null);
   //注意下面这行的 Session.getDefaultInstance 方法的第二个参数
   session = Session.getDefaultInstance(props, new Email_Autherticatorbean(user, password));
   //创建MIME邮件对象
   mimeMsg = new MimeMessage(session);
   //设置发信人
   mimeMsg.setFrom(new InternetAddress(from));
   //设置收信人
   if(to!=null){
    mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
   }
   //设置抄送人
   if(cc!=null){
    mimeMsg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(cc));
   }
   //设置暗送人
   if(bcc!=null){
    mimeMsg.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(bcc));
   }
   //设置邮件主题
   mimeMsg.setSubject(subject,"GBK");
   //设置邮件内容
   mimeMsg.setText(content,"GBK");
   //发送日期
   mimeMsg.setSentDate(new Date());
   //发送邮件
   Transport.send(mimeMsg);
   
   flag = 120;
   //System.out.println( "email send！");
  }catch(MessagingException msgingE){
   flag = 121;
   System.out.println(msgingE.getMessage());
  }

  return flag;
 }

 class Email_Autherticatorbean extends javax.mail.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(){
         super();
       }

       public Email_Autherticatorbean(String username, String userpass){
         super();
         setUsername(username);
         setUserpass(userpass);
       }
       
       //一定要有这个方法，它是在需要身份验证时自动被调用的
       public PasswordAuthentication getPasswordAuthentication(){
         return new PasswordAuthentication(m_username,m_userpass);
       }
    }
   
 public static void main(String[] args) {
  SendMail sm = new SendMail("sswt@163.com,sswt@163.com","sswt@163.com","sswt@163.com","smtp.163.com",
         "smtp.163.com","sswt","密码","sswt@163.com","sswt@163.com");
  
 }

}