java发送邮件

package com.east.email;
 
import java.util.Date;
import java.util.Properties;
 
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
 
/**
 *author:East(张栋芳)
 *date:2008-7-17
 *
 **/
public class SendMail {
 private static MailAuthenticator autherticator=null;
 public static void main(String[] args) {
     for (int i=0;i<5;i++){
      
    String from="zdf_zdf520@163.com";
    String to="271536394@qq.com";
    String smtpServer="smtp.163.com";
    String subject="Hello ,this is a email Test!!";
    String content ="Welcome to you!!";
    Properties props = System.getProperties();
     
    props.put("mail.smtp.host", smtpServer);
    props.put("mail.smtp.auth","true");
    autherticator = new MailAuthenticator("zdf_zdf520@163.com","XXXXXXXX");
    Session session = Session.getDefaultInstance(props,autherticator);
    MimeMessage msg = new MimeMessage(session);
    try{
       msg.setFrom(new InternetAddress(from));
       msg.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(to));
       msg.setSubject(subject);
       msg.setSentDate(new Date());
       msg.setText(content);
       Transport.send(msg);
       System.out.println("成功发送邮件......");
    }catch(Exception se){
        se.printStackTrace();
    }
    }
}
}
    //现在的大部分的邮件服务器都要求有身份验证，所以需要此类实现验证功能
    class MailAuthenticator extends Authenticator{
     
        private String username = null;
        private String userpasswd = null;
     
        public MailAuthenticator(){}
        public MailAuthenticator(String username,String userpasswd){
            this.username = username;
            this.userpasswd = userpasswd;
        }
         
        public void setUserName(String username){
            this.username = username;
        }
     
        public void setPassword(String password){
            this.userpasswd = password;
        }
     
        public PasswordAuthentication getPasswordAuthentication(){
            return new PasswordAuthentication(username,userpasswd);
        }
    }