java获得系统当前日期

 1 package com.web.test;
 2 
 3 import java.text.ParseException;
 4 import java.text.SimpleDateFormat;
 5 import java.util.Calendar;
 6 
 7 public class DateUtil {
 8     
 9     public static void main(String[] args) throws ParseException {
10         System.out.println(getNowTime());
11         System.out.println(getHourAndMinute());
12         System.out.println(getNowDate());
13     }
14     
15     /**
16      * 获得当前时间
17      * @return 字符串，当前时间
18      */
19     public static String getNowTime(){
20         Calendar cal=Calendar.getInstance();
21         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
22         return sdf.format(cal.getTime());
23     }
24     
25     /**
26      * 获得当前小时和分钟
27      * @return 字符串，小时和分钟
28      */
29     public static String getHourAndMinute(){
30         String nowDate = getNowTime();
31         return nowDate.substring(11, 16);
32     }
33     
34     /**
35      * 获得当前日期
36      * @return
37      */
38     public static String getNowDate(){
39         return getNowTime().substring(0, 10);
40     }
41 
42 }