JAVA获取昨日和今日日期时间

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

public class TimeDemo {
    public static void main(String[] args) {
        Calendar calendarDay = Calendar.getInstance();
        calendarDay.add(Calendar.DATE, -1);
        //查询今日时间
        String startTime = new SimpleDateFormat("yyyy-MM-dd 00:00:00").format(new Date());
        String endTime = new SimpleDateFormat("yyyy-MM-dd 23:59:59").format(new Date());
        //查询昨日时间
        String startTime1 = new SimpleDateFormat("yyyy-MM-dd 00:00:00").format(calendarDay.getTime());
        String endTime1 = new SimpleDateFormat("yyyy-MM-dd 23:59:59").format(calendarDay.getTime());
        /*今日2024-01-05 00:00:00结束2024-01-05 23:59:59*/
        System.out.println("今日"+startTime+"结束"+endTime);
        /*昨日2024-01-04 00:00:00结束2024-01-04 23:59:59*/
        System.out.println("昨日"+startTime1+"结束"+endTime1);
    }
}