发送邮件的工具类

package com.souvc.mail;

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

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

/**
 * souvc.com
 */

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 {

            // 接收者的邮箱
            String to[] = { "XX@qq.com" };

            // 配置发送邮箱的配置--
            Properties p = new Properties();
            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);
            // 建立信息
            Message msg = new MimeMessage(session);
            // 发件人
            msg.setFrom(new InternetAddress("XX@163.com"));
            // 收件人
            String toList = getMailList(to);
            InternetAddress[] iaToList = new InternetAddress().parse(toList);
            msg.setRecipients(Message.RecipientType.TO, iaToList);
            // 发送日期
            msg.setSentDate(new Date());
            // 主题
            msg.setSubject("测试邮件");
            // 内容
            msg.setText("注意，这是测试程序发的，请不要回复！");
            // 邮件服务器进行验证
            Transport tran = session.getTransport("smtp");
            // *配置发送者的邮箱账户名和密码
            tran.connect("smtp.163.com", "XX@163.com", "mima");
            // 发送
            tran.sendMessage(msg, msg.getAllRecipients());
            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();

    }

    public static void main(String[] args) {
        SendMail sendMail = SendMail.getInstance();
        sendMail.send();
        // System.out.println(System.nanoTime());
        // UUID uuid = UUID.randomUUID();
        // System.out.println(uuid);
    }
}