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);}
}
