Java·获取当前时间的三种方法

First：

		Date day=new Date();    
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
		System.out.println(df.format(day)); 

Second：

Date date = new Date(System.currentTimeMillis());    
		
		String year = String.format("%tY", date);   

		String month = String.format("%tT" + "", date);   

		String day = String.format("%td", date);    

		System.out.println("今天是："+year+"-"+month+"-"+day); 

Third：

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);   

int date = c.get(Calendar.DATE);    

int hour = c.get(Calendar.HOUR_OF_DAY);   

int minute = c.get(Calendar.MINUTE);   

int second = c.get(Calendar.SECOND);    

System.out.println(year + "/" + month + "/" + date + " " +hour + ":" +minute + ":" + second);