java 获取去年的结束时间 java获取一年前的今天

Java获取当前日期的前后一天/一周/一月/一年

package test;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * @Date: 2023-02-28 星期二 14:14
 * @Author: Special Care
 * @Description: TODO 获取当前日期的前后一天/一周/一月/一年
 * @Version: 1.0.0
 */
public class GetDate {
    public static void main(String[] args) {

        Date today = new Date();   //当前时间
        Calendar calendar = Calendar.getInstance(); //得到日历
        calendar.setTime(today);//把当前时间赋给日历
        calendar.add(Calendar.DAY_OF_MONTH, -1);  //设置为前一天
        Date yesterday = calendar.getTime();   //得到前一天的时间
        calendar.setTime(today);
        calendar.add(Calendar.DAY_OF_MONTH, 1);  //设置为后一天
        Date tomorrow = calendar.getTime();   //得到后一天的时间

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); //设置时间格式
        System.out.println("今天是：" + sdf.format(today));
        System.out.println("昨天是：" + sdf.format(yesterday));
        System.out.println("明天是：" + sdf.format(tomorrow));


        calendar.setTime(today);
        calendar.add(Calendar.DAY_OF_MONTH, -7);
        Date baforeWeek = calendar.getTime();
        calendar.setTime(today);
        calendar.add(Calendar.DAY_OF_MONTH, 7);
        Date afterWeek = calendar.getTime();
        System.out.println("前一周是：" + sdf.format(baforeWeek));
        System.out.println("后一周是：" + sdf.format(afterWeek));


        calendar.setTime(today);
        calendar.add(Calendar.MONTH, -1);
        Date beforeMonth = calendar.getTime();
        calendar.setTime(today);
        calendar.add(Calendar.MONTH, 1);
        Date afterMonth = calendar.getTime();
        System.out.println("前一月是：" + sdf.format(beforeMonth));
        System.out.println("后一月是：" + sdf.format(afterMonth));


        calendar.setTime(today);
        calendar.add(Calendar.YEAR, -1);
        Date beforeYear = calendar.getTime();
        calendar.setTime(today);
        calendar.add(Calendar.YEAR, 1);
        Date afterYear = calendar.getTime();
        System.out.println("前一年是：" + sdf.format(beforeYear));
        System.out.println("后一年是：" + sdf.format(afterYear));

    }
}

运行结果如下：