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[]={"[email protected]","[email protected]"};
            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("[email protected]")); //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();

}


}