Java 获取当前周，上一周，当前月份，上一月份，当前年份，上一年份的第一天最后一天日期

Java_2017_csdn

关注

原创 2022-06-02 20:08:44 1.6k 阅读 AI 写同款· GEO 优化 ›

如何在Java 8中获取一个月的第一天和最后一天如何在Java 8中获取一个月的第一天和最后一天、传入一个年月转为时间区间，该月的第一天和最后一天阅读详情

import java.util.Calendar;
import java.util.Date;



public static void main(String[] args) {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(new Date());
    System.out.println("当前星期(日期)：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.DAY_OF_WEEK, 0);
    calendar.set(Calendar.DAY_OF_WEEK, 1);
    System.out.println("当前星期第一天(日期)：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.DAY_OF_WEEK, 1);
    calendar.set(Calendar.DAY_OF_WEEK, 0);
    System.out.println("当前星期最后一天(日期)：" + sdf.format(calendar.getTime()));

    System.out.println();

    calendar.setTime(new Date());
    calendar.add(Calendar.WEEK_OF_YEAR, -1);
    System.out.println("上周星期(日期)：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.DAY_OF_WEEK, 0);
    calendar.set(Calendar.DAY_OF_WEEK, 1);
    System.out.println("上周星期第一天(日期)：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.DAY_OF_WEEK, 1);
    calendar.set(Calendar.DAY_OF_WEEK, 0);
    System.out.println("上周星期最后一天(日期)：" + sdf.format(calendar.getTime()));

    System.out.println();

    calendar.setTime(new Date());
    System.out.println("当前月份：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.MONTH, 0);
    calendar.set(Calendar.DAY_OF_MONTH, 1);
    System.out.println("当前月份第一天：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.MONTH, 1);
    calendar.set(Calendar.DAY_OF_MONTH, 0);
    System.out.println("当前月份最后一天：" + sdf.format(calendar.getTime()));

    System.out.println();

    calendar.setTime(new Date());
    calendar.add(Calendar.MONTH, -1);
    System.out.println("上月月份：" + sdf.format(calendar.getTime()));
    calendar.set(Calendar.DAY_OF_MONTH, 1);
    System.out.println("上月月份第一天：" + sdf.format(calendar.getTime()));
    calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
    System.out.println("上月月份最后一天：" + sdf.format(calendar.getTime()));

    System.out.println();

    calendar.setTime(new Date());
    System.out.println("当前年份：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.YEAR, 0);
    calendar.set(Calendar.DAY_OF_YEAR, 1);
    System.out.println("当前年份第一天：" + sdf.format(calendar.getTime()));
    calendar.add(Calendar.YEAR, 1);
    calendar.set(Calendar.DAY_OF_YEAR, 0);
    System.out.println("当前年份最后一天：" + sdf.format(calendar.getTime()));

    System.out.println();

    calendar.setTime(new Date());
    calendar.add(Calendar.YEAR, -1);
    System.out.println("上一年份：" + sdf.format(calendar.getTime()));
    calendar.set(Calendar.DAY_OF_YEAR, 1);
    System.out.println("上一年份第一天：" + sdf.format(calendar.getTime()));
    calendar.set(Calendar.DAY_OF_YEAR, calendar.getActualMaximum(Calendar.DAY_OF_YEAR));
    System.out.println("上一年份最后一天：" + sdf.format(calendar.getTime()));

}

收录于