#################Email config start###############################

MAIL_SMTPSERVER=192.168.3.253

##if it is more than one,please separating it by ","  For example "aa@icil.net,bb@icil.net"

MAIL_SEND_TO=qqq.@163.com

MAIL_FROM=www@qq.net

MAIL_SEND_TO_FAIL=afsa2_test@qq.net

#################Email config end###############################

@Component

public class EmailConfig {

    private static String MAIL_SMTPSERVER;

    private static String MAIL_SEND_TO;

    private static String MAIL_FROM;

    private static String MAIL_SEND_TO_FAIL;

    public static String getMAIL_SMTPSERVER() {

        return MAIL_SMTPSERVER;

    }

    @Value("${MAIL_SMTPSERVER}")

    public void setMAIL_SMTPSERVER(String mAIL_SMTPSERVER) {

        MAIL_SMTPSERVER = mAIL_SMTPSERVER;

    }

    public static String getMAIL_SEND_TO() {

        return MAIL_SEND_TO;

    }

    @Value("${MAIL_SEND_TO}")

    public void setMAIL_SEND_TO(String mAIL_SEND_TO) {

        MAIL_SEND_TO = mAIL_SEND_TO;

    }

    public static String getMAIL_FROM() {

        return MAIL_FROM;

    }

    @Value("${MAIL_FROM}")

    public void setMAIL_FROM(String mAIL_FROM) {

        MAIL_FROM = mAIL_FROM;

    }

    public static String getMAIL_SEND_TO_FAIL() {

        return MAIL_SEND_TO_FAIL;

    }

    @Value("${MAIL_SEND_TO_FAIL}")

    public void setMAIL_SEND_TO_FAIL(String mAIL_SEND_TO_FAIL) {

        MAIL_SEND_TO_FAIL = mAIL_SEND_TO_FAIL;

    }

}

package com.icil.esolution.utils;

import java.util.Date;

import java.util.Enumeration;

import java.util.Properties;

import java.util.Vector;

import javax.activation.DataHandler;

import javax.activation.FileDataSource;

import javax.mail.Message;

import javax.mail.Multipart;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

import javax.mail.internet.MimeUtility;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.icil.esolution.config.EmailConfig;

/**

 * ********************************************

 *

 * @ClassName: MailUtils

 *

 * @Description:

 *

 * @author Sea

 *

 * @date 24 Aug 2018 8:34:09 PM

 *

 ***************************************************

 */

@SuppressWarnings("all")

public class MailUtils {

    private static final Logger LOGGER = LoggerFactory.getLogger(MailUtils.class);

    private static  final String MAIL_SEND_TO_FAIL="MAIL_SEND_TO_FAIL";

    private Vector file = new Vector();// 附件文件集合

    public static boolean sendMail(String subject, String content) {

        boolean mails = new MailUtils().sendMails(null, null, subject, content, null);

        return mails;

    }

 /**

  * this use default config

  * @param subject

  * @param content

  * @return

  */

    public static boolean sendFailedMail(String subject, String content) {

        //String tofail = properties.getProperty(MAIL_SEND_TO_FAIL);

        //String tocommon = properties.getProperty(Constant.MAIL_SEND_TO);

        String tofail = EmailConfig.getMAIL_SEND_TO_FAIL();

        String tocommon = EmailConfig.getMAIL_SEND_TO();

        boolean mails = new MailUtils().sendMails(tofail+","+tocommon, null, subject, content, null);

        return mails;

    }

    public static boolean sendMail(String to, String subject, String content) {

        boolean mails = new MailUtils().sendMails(to, null, subject, content, null);

        return mails;

    }

    public static boolean sendMail(String to, String from, String subject, String content) {

        boolean mails = new MailUtils().sendMails(to, from, subject, content, null);

        return mails;

    }

    /**

     * @return

     * @Description: 发送邮件，发送成功返回true 失败false

     * @author sea

     * @Date 2018年8月3日

     */

    private boolean sendMails(String to1, String from1, String subject, String content, String filename) {

        String to = EmailConfig.getMAIL_SEND_TO();

        String from = EmailConfig.getMAIL_FROM();

        String host = EmailConfig.getMAIL_SMTPSERVER();

        LOGGER.info("to is {}",to);

        LOGGER.info("from is {}",from);

        LOGGER.info("host is {}",host);

        String username = "";

        String password ="";

        if (to1 != null) {

            to = to1;

        }

        if (from1 != null) {

            from = from1;

        }

        if(content==null){

            content = "";

        }

        // 构造mail session

        Properties props = new Properties();

        props.put("mail.smtp.host", host);

//        props.put("mail.smtp.port", "25");//

        props.put("mail.smtp.auth","false");    

//        Session session = Session.getDefaultInstance(props, new Authenticator() {

//            public PasswordAuthentication getPasswordAuthentication() {

//                return new PasswordAuthentication(username, password);

//            }

//        });

        Session session=Session.getDefaultInstance(props);

        try {

            // 构造MimeMessage 并设定基本的值

            MimeMessage msg = new MimeMessage(session);

            msg.setFrom(new InternetAddress(from));

//            msg.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(to));

//            msg.addRecipients(Message.RecipientType.CC, address);

            msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));

            subject = transferChinese(subject);

            msg.setSubject(subject);

            // 构造Multipart

            Multipart mp = new MimeMultipart();

            // 向Multipart添加正文

            MimeBodyPart mbpContent = new MimeBodyPart();

            mbpContent.setContent(content, "text/html;charset=utf-8");

            // 向MimeMessage添加（Multipart代表正文）

            mp.addBodyPart(mbpContent);

            // 向Multipart添加附件

            Enumeration efile = file.elements();

            while (efile.hasMoreElements()) {

                MimeBodyPart mbpFile = new MimeBodyPart();

                filename = efile.nextElement().toString();

                FileDataSource fds = new FileDataSource(filename);

                mbpFile.setDataHandler(new DataHandler(fds));

                filename = new String(fds.getName().getBytes(), "ISO-8859-1");

                mbpFile.setFileName(filename);

                // 向MimeMessage添加（Multipart代表附件）

                mp.addBodyPart(mbpFile);

            }

            file.removeAllElements();

            // 向Multipart添加MimeMessage

            msg.setContent(mp);

            msg.setSentDate(new Date());

            msg.saveChanges();

            // 发送邮件

            Transport transport = session.getTransport("smtp");

            transport.connect(host, username, password);

            transport.sendMessage(msg, msg.getAllRecipients());

            transport.close();

        } catch (Exception mex) {

            mex.printStackTrace();

            return false;

        }

        return true;

    }

    /**

     * @param strText

     * @return

     * @Description: 把主题转为中文 utf-8

     * @Date 2017年6月22日 上午10:37:07

     */

    public String transferChinese(String strText) {

        try {

            strText = MimeUtility.encodeText(new String(strText.getBytes(), "utf-8"), "utf-8", "B");

        } catch (Exception e) {

            e.printStackTrace();

        }

        return strText;

    }

    public void attachfile(String fname) {

        file.addElement(fname);

    }

    /**

     *

     * @Description:test ok 2018-08-24

     *

     * @author Sea

     *

     * @date 24 Aug 2018 8:34:09 PM

     */

    public static void main(String[] args) {

        boolean mails = new MailUtils().sendMails("", "", "hello", "I love you icil", null);

        System.out.println(mails);

    }

}