javamail实现邮件群发

Demo2.java:

package com.cz.email;

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;

import org.apache.log4j.Logger;

public class Demo2 {
    private static final String MAIL_USER = "mylearn";   //邮件服务器登录用户名 
    
    private static final String MAIL_PASSWORD = "mylearn";   //邮件服务器登录密码 
   
    private static final String MAIL_FROM_SMTP = "[e-mail]";  //发送邮件地址
    
    public void sendmail(String[] mailArray,String subject,String content){
        Properties props = new Properties();
        //设置服务器验证
        props.setProperty("mail.smtp.auth", "true");
        //设置传输协议
        props.setProperty("mail.transport.protocol", "smtp");
        //选择服务类型
        props.setProperty("mail.host", "smtp.sina.com");
        //通过认证创建一个session实例
        Session session = Session.getInstance(props,
                new Authenticator()
                {
                    protected PasswordAuthentication getPasswordAuthentication()
                    {
                        return new PasswordAuthentication(MAIL_USER,MAIL_PASSWORD);
                    }
                }
        );
        //显示邮件发送过程中的交互信息
        session.setDebug(true);
        
        Message msg = new MimeMessage(session);
        Transport transport=null;
        try {
            //邮件发送人
            msg.setFrom(new InternetAddress(MAIL_FROM_SMTP));
            //邮件主题
            msg.setSubject(subject);            
            //邮件内容
            msg.setText(content);
            int len=mailArray.length;  
            InternetAddress address[]=new InternetAddress[len];  
            for (int i = 0; i < mailArray.length; i++) {
                address[i]=new InternetAddress(mailArray[i]); 
            }
            //邮件接收方
            msg.addRecipients(Message.RecipientType.TO, address);
            transport.send(msg);            
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                if(transport!=null){
                    transport.close();
                }               
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }       
    }
    public static void main(String[] args) throws Exception{
        Demo2 demo2=new Demo2();
        String[] mailArray ={"[e-mail]","[e-mail]"};
        String subject="冬天来啦!";
        String content="Hello world啊!";
        demo2.sendmail(mailArray,subject,content);
    }


}

 上传需要的mail.jar包：