如何在java中使用ical4j创建重复事件.ics文件?

Question

这是使用 java 为正常事件创建.ics文件的示例代码。

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);
java.util.Calendar cal = java.util.Calendar.getInstance();
cal.set(java.util.Calendar.MONTH, java.util.Calendar.DECEMBER);
cal.set(java.util.Calendar.DAY_OF_MONTH, 25);
// initialise as an all-day event..
VEvent christmas = new VEvent(new Date(cal.getTime()), "Christmas Day");
// Generate a UID for the event..
UidGenerator ug = new UidGenerator("1");
christmas.getProperties().add(ug.generateUid());
calendar.getComponents().add(christmas);
ServletOutputStream fout = response.getOutputStream();
CalendarOutputter outputter = new CalendarOutputter();
outputter.output(calendar, fout);

Answer 1

假设您的重复模式是

String recurrencePattern = "FREQ=MONTHLY;INTERVAL=1;BYDAY=SU;BYSETPOS=1;COUNT=5"

然后，您可以通过这种方式在当前事件中添加重复周期信息。

VEvent christmas = new VEvent(new Date(cal.getTime()), "Christmas Day");
christmas.getProperties().add(new RRule(recurrencePattern));