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);
    }

}