Java 后台获取当前时间

Calendar c = Calendar.getInstance();//可以对每个时间域单独修改
	int year = c.get(Calendar.YEAR); 
	int month = c.get(Calendar.MONTH)+1; 
	int day = c.get(Calendar.DATE); 
	int hour = c.get(Calendar.HOUR_OF_DAY); 
	int minute = c.get(Calendar.MINUTE); 
	int second = c.get(Calendar.SECOND); 
	
	Date d = new Date();
	SimpleDateFormat sfYear = new SimpleDateFormat("yyyy");
	SimpleDateFormat sfMonth = new SimpleDateFormat("MM");
	SimpleDateFormat sfDay = new SimpleDateFormat("dd");
	SimpleDateFormat sfHour = new SimpleDateFormat("HH");//大写的双H表示24小时，小写的表示12小时
	SimpleDateFormat sfMinute = new SimpleDateFormat("mm");
	SimpleDateFormat sfSecond = new SimpleDateFormat("ss");
	
	year = Integer.valueOf(sfYear.format(d));
	month = Integer.valueOf(sfMonth.format(d));
	day = Integer.valueOf(sfDay.format(d));
	hour = Integer.valueOf(sfHour.format(d));
	minute = Integer.valueOf(sfMinute.format(d));
	second = Integer.valueOf(sfSecond.format(d));