[Java] 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); 
  } 
}

年: 2012
月: 1
日: 13
时: 17
分: 28
秒: 19
当前时间毫秒数：1326446899902
fri jan 13 17:28:19 cst 2012
fri jan 13 17:28:19 cst 2012
格式化后的日期：2012-01-13 17:28:19
字符串转成日期：fri jan 13 17:26:33 cst 2012