java - cal4j - 文件异常的意外结束

Question

我目前不知道这里有什么问题，我请求帮助。

我正在生成一个 ics - 文件。但是如果我想打开 ics - File 来获取日历，我会收到以下错误消息：

net.fortuna.ical4j.data.ParserException：第 1 行出错：文件意外结束

这是我的信息：ical4j 版本 3.0.1 Java：8 Build 181

我的 ics 输出 - 文件：

BEGIN:VCALENDAR PRODID:-//Ben Fortuna//iCal4j 1.0//EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT DTSTAMP:20180826T165052Z DTSTART:01180905T000000 DTEND:01180905T000000 SUMMARY:ddd TZID:Europe/Berlin UID:1535302250819-9ed0489f-0320 -4a66-8f9c-4af0e62cdedd 结束：事件结束：VCALENDAR

这是我生成calender.ics的代码 - 文件：

public void createEvent(BookingDate bookingDate, Mandatory mandatory, Employee employee)
        throws FileNotFoundException, IOException, ParserException, ConstraintViolationException {

    // Create a TimeZone
    System.setProperty("net.fortuna.ical4j.timezone.cache.impl", MapTimeZoneCache.class.getName());

    TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();
    TimeZone timezone = registry.getTimeZone("Europe/Berlin");
    VTimeZone tz = timezone.getVTimeZone();

    String pathMandatoryFile = null;
    String pathEmployeeFile = null;

    // Reading the file and creating the calendar
    Calendar icsCalendar = null;
    FileOutputStream fout = null;

    if (bookingDate.isCreateCalendarMandatoryEntry()) {
        // timezone = registry.getTimeZone(mandatory.getTimeZone());

        pathMandatoryFile = "calendar.ics";
        fout = new FileOutputStream(pathMandatoryFile);
        try {
            FileInputStream fin = new FileInputStream(pathMandatoryFile);
            CalendarBuilder builder = new CalendarBuilder();
            icsCalendar = builder.build(fin);
        } catch (Exception e) {

        }

        if (icsCalendar == null) {
            icsCalendar = createNewCalender(pathMandatoryFile);
        }
    }

    // Creating an event
    java.util.Calendar startCal = java.util.Calendar.getInstance(timezone);
    startCal.set(java.util.Calendar.YEAR, bookingDate.getStartDate().getYear());
    startCal.set(java.util.Calendar.MONTH, bookingDate.getStartDate().getMonth());
    startCal.set(java.util.Calendar.DAY_OF_MONTH, bookingDate.getStartDate().getDate());
    startCal.set(java.util.Calendar.HOUR_OF_DAY, bookingDate.getStartDate().getHours());
    startCal.clear(java.util.Calendar.MINUTE);
    startCal.clear(java.util.Calendar.SECOND);

    java.util.Calendar endCal = java.util.Calendar.getInstance(timezone);
    endCal.set(java.util.Calendar.YEAR, bookingDate.getEndDate().getYear());
    endCal.set(java.util.Calendar.MONTH, bookingDate.getEndDate().getMonth());
    endCal.set(java.util.Calendar.DAY_OF_MONTH, bookingDate.getEndDate().getDate());
    endCal.set(java.util.Calendar.HOUR_OF_DAY, bookingDate.getEndDate().getHours());
    endCal.clear(java.util.Calendar.MINUTE);
    endCal.clear(java.util.Calendar.SECOND);

    net.fortuna.ical4j.model.DateTime dtStart = new DateTime(startCal.getTime());
    net.fortuna.ical4j.model.DateTime dtEnd = new DateTime(endCal.getTime());


    String eventName = bookingDate.getName();
    VEvent meeting = new VEvent(dtStart, dtEnd, eventName);

    // add timezone info..
    meeting.getProperties().add(tz.getTimeZoneId());
    String uidValue = bookingDate.getIdHash();
    meeting.getProperties().add(new Uid(uidValue));

    // Add the event and print
    icsCalendar.getComponents().add(meeting);

    CalendarOutputter outputter = new CalendarOutputter();
    outputter.output(icsCalendar, fout);

}


private Calendar createNewCalender(String filePath) throws ValidationException, IOException {

    // Saving an iCalendar file
    FileOutputStream fout = new FileOutputStream(filePath);

    Calendar calendar = new Calendar();
    calendar.getProperties().add(new ProdId("-//Ben Fortuna//iCal4j 1.0//EN"));
    calendar.getProperties().add(Version.VERSION_2_0);
    calendar.getProperties().add(CalScale.GREGORIAN);

    return calendar;
}

任何人都可以帮助我，拜托。

标签： javaical4j