Java獲取當前時間的年月日方法

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("時: " + 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("當前時間毫秒數：" + 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定義的格式一樣  
        Date today = sdf.parse(str);  
        System.out.println("字符串轉成日期：" + today);  
    }  
}</pre> 

 
 
 
 
 
 
 輸出結果： 
 年: 2012 

 月: 1 

 日: 13 

 時: 17 

 分: 28 

 秒: 19 

 當前時間毫秒數：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 

 字符串轉成日期：Fri Jan 13 17:26:33 CST 2012