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);
}

}