import java.io.File;

import java.io.UnsupportedEncodingException;

import java.util.Properties;

import javax.activation.DataHandler;

import javax.activation.FileDataSource;

import javax.mail.Authenticator;

import javax.mail.BodyPart;

import javax.mail.Message.RecipientType;

import javax.mail.MessagingException;

import javax.mail.Multipart;

import javax.mail.PasswordAuthentication;

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;

public class MailUtil {

    /**

     * @Description: 使用QQ邮箱发送不带附件的邮件，收件人邮箱类型不限。

     * @date: 2019年12月17日 下午4:51:01

     * @author: ggwudivs

     * @param subject        邮件标题

     * @param content        邮件内容

     * @param fromUser        发件人邮箱

     * @param fromPass        发件人邮箱密码，应为16位SMTP口令

     * @param tO_Recipients    收件人邮箱，多个收件人用","分隔

     * @param openSSL        是否开启SSL

     * @throws UnsupportedEncodingException

     * @throws MessagingException:

     * @return: void

     */

    public static void sendMessage_QQ (String subject, String content, String fromUser, String fromPass, String tO_Recipients, boolean openSSL) throws UnsupportedEncodingException, MessagingException{

        sendMessage(subject, content, fromUser, fromPass, null, tO_Recipients, null, null, "smtp.qq.com", openSSL?"465":"587", null, openSSL);

    }

    /**

     * @Description: 使用QQ邮箱发送带附件的邮件，收件人邮箱类型不限。

     * @date: 2019年12月17日 下午5:25:14

     * @author: ggwudivs

     * @param subject                邮件标题

     * @param content                邮件内容

     * @param fromUser                发件人邮箱

     * @param fromPass                发件人邮箱密码，应为16位SMTP口令

     * @param tO_Recipients            收件人邮箱，多个收件人用","分隔

     * @param attachmentFilesPath    邮件附件路径，多个附件用","分隔

     * @param openSSL                是否开启SSL

     * @throws UnsupportedEncodingException

     * @throws MessagingException:

     * @return: void

     */

    public static void sendMessage_QQ (String subject, String content, String fromUser, String fromPass, String tO_Recipients, String attachmentFilesPath, boolean openSSL) throws UnsupportedEncodingException, MessagingException{

        sendMessage(subject, content, fromUser, fromPass, null, tO_Recipients, null, null, "smtp.qq.com", openSSL?"465":"587", attachmentFilesPath, openSSL);

    }

    /**

     * @Description: smtp发送邮件

     * @date: 2019年12月17日 下午3:22:35

     * @author: ggwudivs

     * @param subject                邮件标题

     * @param content                邮件文本内容

     * @param fromUser                发件人邮箱

     * @param fromPass                发件人邮箱密码，QQ邮箱应为16位SMTP口令

     * @param nickname                发件人昵称

     * @param tO_Recipients            收件人邮箱，多个收件人用","分隔

     * @param cC_Recipients            抄送人邮箱，多个抄送人用","分隔

     * @param bCC_Recipients        密送人邮箱，多个密送人用","分隔

     * @param smtpHost                smtp服务器地址

     * @param smtpPort                smtp服务器端口

     * @param attachmentFilesPath    邮件附件路径，多个附件用","分隔

     * @throws MessagingException

     * @throws UnsupportedEncodingException:

     * @return: void

     */

    public static void sendMessage(String subject, String content, String fromUser, String fromPass, String nickname, String tO_Recipients, String cC_Recipients, String bCC_Recipients, String smtpHost, String smtpPort, String attachmentFilesPath, boolean openSSL) throws MessagingException, UnsupportedEncodingException {

        //创建Properties类，用于记录邮箱的一些属性

        Properties props = new Properties();

        //表示SMTP发送邮件，必须进行身份验证

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

        //SMTP服务器地址

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

        //是否开启SSL

        if(!openSSL){

            //SMTP服务器端口号

            props.put("mail.smtp.port", smtpPort);

        }else{

            //SMTP服务器ssl端口号

            props.setProperty("mail.smtp.socketFactory.port", smtpPort);

            props.setProperty("mail.smtp.socketFactory.fallback", "false");

            props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

        }

        //构建授权信息，用于进行SMTP进行身份验证

        Authenticator authenticator = new Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {

                //发件人账号，发件人密码（QQ邮箱应为16位SMTP口令）

                return new PasswordAuthentication(fromUser, fromPass);

            }

        };

        //使用环境属性和授权信息，创建邮件会话

        Session mailSession = Session.getInstance(props, authenticator);

        //创建邮件消息

        MimeMessage message = new MimeMessage(mailSession);

        //设置发件人，有昵称时同时设置昵称

        try {

            message.setFrom((nickname==null||"".equals(nickname))?new InternetAddress(fromUser):new InternetAddress(fromUser, nickname, "UTF-8"));

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        }

        //设置一个或多个收件人

        message.setRecipients(RecipientType.TO, tO_Recipients);

        //设置一个或多个抄送人

        message.setRecipients(RecipientType.CC, cC_Recipients);

        //设置一个或多个密送人

        message.setRecipients(RecipientType.BCC, bCC_Recipients);

        //设置邮件标题

        message.setSubject(subject);

        //设置邮件的内容

        if(attachmentFilesPath == null || "".equals(attachmentFilesPath)){

            //设置邮件的正文文本

            message.setContent(content, "text/html;charset=UTF-8");

        }else{

            //向multipart对象中添加邮件的各个部分内容，包括文本内容和附件

            Multipart multipart = new MimeMultipart();

            //添加邮件文本内容

            BodyPart contentBodyPart = new MimeBodyPart();

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

            multipart.addBodyPart(contentBodyPart);

            //添加邮件附件内容

            BodyPart attachmentBodyPart = new MimeBodyPart();

            String[] attachmentFiles = attachmentFilesPath.split(",");

            for (String attachmentFile : attachmentFiles) {

                if (attachmentFile != null && !"".equals(attachmentFile)) {

                    attachmentBodyPart = new MimeBodyPart(); 

                    //根据附件路径获取文件,

                    FileDataSource dataSource = new FileDataSource(new File(attachmentFile));

                    attachmentBodyPart.setDataHandler(new DataHandler(dataSource));

                    //MimeUtility.encodeWord可以避免文件名乱码

                    String strFileName=dataSource.getFile().getName();

                    attachmentBodyPart.setFileName(MimeUtility.encodeText(strFileName));  

                    multipart.addBodyPart(attachmentBodyPart);

                }

            }

            //设置邮件的正文内容

            message.setContent(multipart);

        }

        //发送邮件

        Transport.send(message);

    }

}