Java获取本周一、上周一、下周一时间 工具类 import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;public class DateUtils {private static final SimpleDateFormat sdf = new SimpleDateFormat("y

import java.text.SimpleDateFormat;import java.util.Calendar;public class DateTest {public static void main(String[] args){firstDayOfWeek();lasyDayOfWeek();nextMondayOfWeek();firstdayOfMonth();lastday