Java日期处理汇总

1、如何获得上周星期日的日期

public class DateTest {

	public static void main(String[] args) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		System.out.println(sdf.format(getLastWeekSunday()));
	}

	/**
	 * 获得上周星期日的日期
	 * @return
	 */
	public static Date getLastWeekSunday(){
		Calendar date = Calendar.getInstance();
		//将每周第一天设为星期一，默认是星期天
		date.setFirstDayOfWeek(Calendar.MONDAY);
		//周数减一，即上周
		date.add(Calendar.WEEK_OF_MONTH, -1);
		//设为星期天
		date.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
		return date.getTime();
	}