当天0点和当前时间戳

import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Test {

 public Timestamp getDayBegin() {
  Calendar cal = Calendar.getInstance();
  cal.set(Calendar.HOUR_OF_DAY, 0);
  cal.set(Calendar.SECOND, 0);
  cal.set(Calendar.MINUTE, 0);
  cal.set(Calendar.MILLISECOND, 001);
  return new Timestamp(cal.getTimeInMillis());
 }

 public Timestamp getDayBeginTimestamp() {
  Date date = new Date();
  GregorianCalendar gc = new GregorianCalendar();
  gc.setTime(date);
  Date date2 = new Date(date.getTime() - gc.get(gc.HOUR_OF_DAY) * 60 * 60
    * 1000 - gc.get(gc.MINUTE) * 60 * 1000 - gc.get(gc.SECOND)
    * 1000);
  return new Timestamp(date2.getTime());
 }

 public static void main(String[] args) throws ParseException {
  //当前0点时间戳
  System.out.println(new Test().getDayBegin());
  // 当天0点时间戳
  System.out.println(new Test().getDayBeginTimestamp());
  // 当前时间戳
  System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS")
    .format(new Date()));
  System.out.println(Calendar.getInstance().getTime());
  // 当前时间戳
  System.out.println(new Timestamp(System.currentTimeMillis()));

 }

}

当天0点和当前时间戳

原文：http://blog.csdn.net/dcx903170332/article/details/44679269