Java获取当前时间
import java.text.SimpleDateFormat; import java.util.Date; public class Datetest { // SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd 20:00:00"); public static void main(String[] args) { //SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd 00:00:00"); //SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:MM:ss"); Date date = new Date(); //String time = simpleDateFormat.format(date); System.out.print(date); System.out.print(time } }SimpleDateFormat指定时间格式 2017-08-05 14:08:00,2017-08-05 20:00:00
System.out.print(date);直接输出当前时间,格式Sat Aug 05 14:05:31 CST 2017
Calendar currentDate = new GregorianCalendar(); currentDate.set(Calendar.HOUR_OF_DAY, 0); currentDate.set(Calendar.MINUTE, 0); currentDate.set(Calendar.SECOND, 0); String startTime = simpleDateFormat.format(currentDate.getTime());1.2017-08-05 00:00:00 第二种方式输出每天的开始时间。