java日期年月日

‘壹’ java如何获取当前时间 年月日 时分秒

//得到long类型当前时间

longl=System.currentTimeMillis();

//new日期对

Datedate=newDate(l);

//转换提日期输出格式

SimpleDateFormatdateFormat=newSimpleDateFormat("yyyy-MM-

ddHH:mm:ss");System.out.println(dateFormat.format(date));

(1)java日期年月日扩展阅读

package com.ob;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class DateTest {

public static void main(String[] args) throws ParseException {

Calendar now = Calendar.getInstance();

System.out.println("年: " + now.get(Calendar.YEAR));

System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + "");

System.out.println("日: " + now.get(Calendar.DAY_OF_MONTH));

System.out.println("时: " + now.get(Calendar.HOUR_OF_DAY));

System.out.println("分: " + now.get(Calendar.MINUTE));

System.out.println("秒: " + now.get(Calendar.SECOND));

System.out.println("当前时间毫秒数：" + now.getTimeInMillis());

System.out.println(now.getTime());

Date d = new Date();

System.out.println(d);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateNowStr = sdf.format(d);

System.out.println("格式化后的日期：" + dateNowStr);

String str = "2012-1-13 17:26:33";

//要跟上面sdf定义的格式一样
Date today = sdf.parse(str);

System.out.println("字符串转成日期：" + today);
}
}