package com.infomorrow.dao;

import java.sql.Timestamp;

import java.util.Calendar;

import java.util.TimeZone;

import org.junit.Test;

public class test_date {

@Test

public void test(){
    Timestamp today = new Timestamp(Calendar.getInstance(TimeZone.getTimeZone("GMT+8")).getTimeInMillis());
int year=today.getYear()+1900;

    int month=today.getMonth()+1;

    int day = today.getDate();

    String date = year+"-"+month+"-"+day;

    System.out.println("date:"+date);

    System.out.println(today);

    }

}

//输出

date:2013-12-17

2013-12-17 13:04:30.809

package utils;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.Locale;

public class DateParser {

public static void main(String[] args) {

//java时间格式转换： Mar 30, 2014 3:49:2 PM 如何转换成标准的java Date对象

/*

LetterDate or Time ComponentPresentationExamples

GEra designatorTextAD

yYearYear1996; 96

MMonth in yearMonthJuly; Jul; 07

wWeek in yearNumber27

WWeek in monthNumber2

DDay in yearNumber189

dDay in monthNumber10

FDay of week in monthNumber2

EDay in weekTextTuesday; Tue

aAm/pm markerTextPM

HHour in day (0-23)Number0

kHour in day (1-24)Number24

KHour in am/pm (0-11)Number0

hHour in am/pm (1-12)Number12

mMinute in hourNumber30

sSecond in minuteNumber55

SMillisecondNumber978

zTime zoneGeneral time zonePacific Standard Time; PST; GMT-08:00

ZTime zoneRFC 822 time zone-0800

*/

SimpleDateFormat sdf = new SimpleDateFormat("MMM d, yyyy K:m:s a",Locale.ENGLISH);

Date d2 = null;

try {

d2 = sdf.parse("Mar 30, 2014 3:49:2 PM");

} catch (ParseException e) {

e.printStackTrace();

}

Date d3 = new Date();

System.out.println("d2 ====== "+d2);

System.out.println("d3 ====== "+sdf.format(d3));

}

}