javamail向多人发送邮件例子代码

注意：此代码需要添加mail.jar和activation.jar两个包，这两个包可以到sun的官网下载javamail和jaf这两个文件。

Java代码  

package com.lccert.crm.chemistry.util;

import java.util.Date;
import java.util.Properties;

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;


public class SendMail {

    private static SendMail instance = null;

    private SendMail() {

    }

    public static SendMail getInstance() {
        if (instance == null) {
            instance = new SendMail();
        }
        return instance;
    }

    public void send() {
        try {
            String to[]={"[e-mail]","[e-mail]"};
           Properties p = new Properties(); //Properties p = System.getProperties();
            p.put("mail.smtp.auth", "true");
            p.put("mail.transport.protocol", "smtp");
            p.put("mail.smtp.host", "smtp.163.com");
            p.put("mail.smtp.port", "25");
            //建立会话
            Session session = Session.getInstance(p);
            Message msg = new MimeMessage(session); //建立信息

            msg.setFrom(new InternetAddress("[e-mail]")); //发件人

            String toList = getMailList(to);
            InternetAddress[] iaToList = new InternetAddress().parse(toList);

            msg.setRecipients(Message.RecipientType.TO,iaToList); //收件人

            msg.setSentDate(new Date()); // 发送日期
            msg.setSubject("javamail测试邮件"); // 主题
            msg.setText("注意，这是测试程序发的，请不要回复！"); //内容
            // 邮件服务器进行验证
            Transport tran = session.getTransport("smtp");
            tran.connect("smtp.163.com", "tiwson", "9041160");
            // bluebit_cn是用户名，xiaohao是密码
            tran.sendMessage(msg, msg.getAllRecipients()); // 发送
            System.out.println("邮件发送成功");

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private String getMailList(String[] mailArray){

        StringBuffer toList = new StringBuffer();
    int length = mailArray.length;
        if(mailArray!=null && length <2){
             toList.append(mailArray[0]);
        }else{
             for(int i=0;i<length;i++){
                     toList.append(mailArray[i]);
                     if(i!=(length-1)){
                         toList.append(",");
                     }

             }
         }
     return toList.toString();

}


}