使用日历 class from java api。

Use Calendar class from java api.

Calendar calendar = new GregorianCalendar(2008, 01, 01); // Note that Month value is 0-based. e.g., 0 for January.
int reslut = calendar.get(Calendar.DAY_OF_WEEK);
switch (result) {
case Calendar.MONDAY:
    System.out.println("It's Monday !");
    break;
}

您还可以使用 SimpleDateFormater 和日期解析日期

You could also use SimpleDateFormater and Date for parsing dates

Date date = new Date();
SimpleDateFormat date_format = new SimpleDateFormat("yyyy-MM-dd");
try {
    date = date_format.parse("2008-01-01");
} catch (ParseException e) {
    e.printStackTrace();
}

calendar.setTime(date);