<!-- 导入ical4j库 -->
<dependency>
	<groupId>org.mnode.ical4j</groupId>
	<artifactId>ical4j</artifactId>
	<version>1.0.2</version>
</dependency>

<!-- 邮件start -->
<dependency>
	<groupId>javax.mail</groupId>
	<artifactId>mail</artifactId>
	<version>1.4.7</version>
</dependency>

public static Multipart getContentText() throws Exception {
        // 时区
        TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();
        TimeZone timezone = registry.getTimeZone("Asia/Shanghai");
        // 会议地点
        String location = "安徽省合肥市";
        // 会议时间
        java.util.Calendar cal = java.util.Calendar.getInstance();

        cal.setTimeZone(timezone);
        //会议启动时间
        cal.set(2018, 2 - 1, 13, 13, 45); // 月份是要早一个月
        DateTime start = new DateTime(cal.getTime());
        //会议结束时间
        cal.set(2018, 2 - 1, 13, 18, 55);
        DateTime end = new DateTime(cal.getTime());

        
        // --------事件（VEvent start）----------
        VEvent vevent = new VEvent(start, end, subject);
        vevent.getProperties().add(timezone.getVTimeZone().getTimeZoneId());// 时区
        vevent.getProperties().add(new Location(location));// 会议地点
        vevent.getProperties().add(new Summary(subject));// 邮件主题
        vevent.getProperties().add(new Description(content));// 邮件内容
        vevent.getProperties().add(new UidGenerator("meeting invite").generateUid());// 设置uid
        vevent.getProperties().add(new Organizer(URI.create("mailto:" + from)));
        // 与会人
        Set<String> emailSet = new HashSet<String>();
        emailSet.add(from);
        emailSet.add(to);
        int i = 1;
        for (String email : emailSet) {
            Attendee attendee = new Attendee(URI.create("mailto:" + email));
            if (1 == i) {
                attendee.getParameters().add(Role.REQ_PARTICIPANT);
            } else {
                attendee.getParameters().add(Role.OPT_PARTICIPANT);
            }
            attendee.getParameters().add(new Cn("Developer" + i));
            vevent.getProperties().add(attendee);
            i++;
        }
        // --------VEvent Over----------
        
        
        // --------提醒（VAlarm Start）----------
        // 提前10分钟提醒
        VAlarm valarm = new VAlarm(new Dur(0, 0, -10, 0));
        // 重复一次
        valarm.getProperties().add(new Repeat(1));
        // 持续十分钟
        valarm.getProperties().add(new Duration(new Dur(0, 0, 10, 0)));
        
        // 提醒窗口显示的文字信息
        valarm.getProperties().add(new Summary("Event Alarm"));
        valarm.getProperties().add(Action.DISPLAY);
        valarm.getProperties().add(new Description("Progress Meeting at 9:30am"));
        vevent.getAlarms().add(valarm);// 将VAlarm加入VEvent
        // --------VAlarm Over-------------
        
        
        // --------日历对象 Start---------------
        Calendar icsCalendar = new Calendar();
        icsCalendar.getProperties().add(new ProdId("-//Events Calendar//iCal4j 1.0//EN"));
        icsCalendar.getProperties().add(CalScale.GREGORIAN);
        icsCalendar.getProperties().add(Version.VERSION_2_0);
        icsCalendar.getProperties().add(Method.REQUEST);
        icsCalendar.getComponents().add(vevent);// 将VEvent加入Calendar
        // 将日历对象转换为二进制流
        CalendarOutputter co = new CalendarOutputter(false);
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        co.output(icsCalendar, os);
        byte[] mailbytes = os.toByteArray();
        // --------日历对象 Over------------------
        
        
        BodyPart mbp = new MimeBodyPart();
        mbp.setContent(mailbytes, "text/calendar;method=REQUEST;charset=UTF-8");

        MimeMultipart mm = new MimeMultipart();
        mm.setSubType("related");
        mm.addBodyPart(mbp);
        return mm;
    }

    private static String from = "***@126.com"; 
    private static String to = "***@126.com";//收件人 
    private static String subject = "test";//标题 
    private static String content = "青空报告总结会议";//邮件内容 
    
    public static void main(String[] args) {
        // 链接邮件服务器
        Properties props = new Properties();
        props.put("mail.transport.protocol", "smtp"); // 邮件协议
        props.put("mail.smtp.host", "smtp.126.com"); // 服务器域名
        props.put("mail.smtp.auth", "true");
        //账号密码认证
        Authenticator auth = new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                String username = "***@126.com"; // 大多数是你邮件@前面的部分
                String pwd = "******";
                return new PasswordAuthentication(username, pwd);
            }
        };
        Session mailSession = Session.getInstance(props, auth);
        // 获取Message对象
        Message msg = new MimeMessage(mailSession);
        try {
            // 设置邮件基本信息
            msg.setFrom(new InternetAddress(from));//发件人
            msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));//收件人
            msg.setSentDate(new java.util.Date());//发送时间
            msg.setSubject(subject);//发送标题
            Multipart mp = getContentText();// 获取不同类型的邮件的邮件内容
            msg.setContent(mp);
            msg.saveChanges();
        } catch (Exception ex) {
        }
        System.out.println(sendEmail(msg));
    }

    public static Boolean sendEmail(Message msg) {
        // 发送邮件
        try {
            Transport.send(msg);
            return true;
        } catch (SendFailedException e) {// 邮件地址无效
            System.out.println(e);
            return false;
        } catch (Exception e) {
            Timer timer = new Timer();
            System.out.println(e);
            return false;
        }
    }