java获得系统当前日期

 package com.web.test;

 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;

 public class DateUtil {

     public static void main(String[] args) throws ParseException {
         System.out.println(getNowTime());
         System.out.println(getHourAndMinute());
         System.out.println(getNowDate());
     }

     /**
      * 获得当前时间
      * @return 字符串，当前时间
      */
     public static String getNowTime(){
         Calendar cal=Calendar.getInstance();
         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
         return sdf.format(cal.getTime());
     }

     /**
      * 获得当前小时和分钟
      * @return 字符串，小时和分钟
      */
     public static String getHourAndMinute(){
         String nowDate = getNowTime();
         return nowDate.substring(11, 16);
     }

     /**
      * 获得当前日期
      * @return
      */
     public static String getNowDate(){
         return getNowTime().substring(0, 10);
     }

 }