Java获取当前时间年月日的方法

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);

   }

}