import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
 * 周工具类
public class WeekUtils {
     * 获取本周的第一天
     * @return String
    public static String getThisWeekMonday() {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.WEEK_OF_MONTH, 0);
        cal.set(Calendar.DAY_OF_WEEK, 2);
        Date time = cal.getTime();
        return new SimpleDateFormat("yyyy-MM-dd").format(time) + " 00:00:00";
     * 获取本周的最后一天
     * @return String
    public static String getThisWeekSunday() {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.DAY_OF_WEEK, cal.getActualMaximum(Calendar.DAY_OF_WEEK));
        cal.add(Calendar.DAY_OF_WEEK, 1);
        Date time = cal.getTime();
        return new SimpleDateFormat("yyyy-MM-dd").format(time) + " 23:59:59";
     * 获取上周的第一天
     * @return
     * @throws Exception
    public static String getPreviousWeekMonday() {
        int week = -1;
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(5, mondayPlus + 7 * week);
        Date preMonday = currentDate.getTime();
        return new SimpleDateFormat("yyyy-MM-dd").format(preMonday) + " 00:00:00";
     * 获取上周的最后一天
     * @return
    public static String getPreviousWeekSunday() {
        int weeks = -1;
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(5, mondayPlus + weeks);
        Date preSunday = currentDate.getTime();
        return new SimpleDateFormat("yyyy-MM-dd").format(preSunday) + " 23:59:59";
    public static int getMondayPlus() {
        Calendar cd = Calendar.getInstance();
        int dayOfWeek = cd.get(7) - 1;
        if (dayOfWeek == 1) {
            return 0;
        return (1 - dayOfWeek);
    public static void main(String[] args) throws Exception {
        System.out.println("获取上周的第一天:" + WeekUtils.getPreviousWeekMonday());
        System.out.println("获取上周的最后一天:" + WeekUtils.getPreviousWeekSunday());
        System.out.println("获取本周的第一天:" + WeekUtils.getThisWeekMonday());
        System.out.println("获取本周的最后一天:" + WeekUtils.getThisWeekSunday());
 
– 求知若饥，虚心若愚。
 
                                    请大神指教。1.[代码][Java]代码//获取周第一天public Date getStartDayOfWeek(String date) {LocalDate now = LocalDate.parse(date);return this.getStartDayOfWeek(now);}public Date getStartDayOfWeek(TemporalAccessor date) {...
                                    我整理的一些关于【Java】的项目学习资料（附讲解～～）和大家一起分享、学习一下：https://d.51cto.com/f2PFnNJava中如何获取各周的开始日期和结束日期
在Java中，处理时间和日期非常常见。尤其是在需要获取一周的开始和结束日期时，我们需要一些策略来有效地实现这一功能。本文将详细介绍如何使用Jav...
                                    System.out.println("本月开始时间 = " + firstDayOfMonthStart.format(pattern));System.out.println("本月结束时间 = " + firstDayOfMonthEnd.format(pattern));System.out.println("当天开始时间 = " + todayStart.format(pattern));// 本月最后一天的最后时间。// 本月1号的开始时间。
        Date date = new Date();//获得系统时间.
        SimpleDateFormat sdf = new SimpleDateFormat(" yyyy-MM-dd HH:mm:ss");
        String nowTime = sdf.format(date);
        Date time = sdf.parse(nowTime);
2、获取昨天时间（年月日时分秒）
        Date dN.
                                    第一种方法public static String getFirstAndLastOfWeek(String dataStr) throws ParseException {
        Calendar cal = Calendar.getInstance();        cal.setTime(new SimpleDateFormat("yyyy-MM-dd").parse(dataSt