Java 获取当前时间的三种方法

Date date = new Date(); SimpleDateFormat dateFormat= new
SimpleDateFormat("yyyy-MM-dd :hh:mm:ss");
System.out.println(dateFormat.format(date));

Calendar calendar= Calendar.getInstance(); SimpleDateFormat
dateFormat= new SimpleDateFormat("yyyy-MM-dd :hh:mm:ss");
System.out.println(dateFormat.format(calendar.getTime()));

Calendar cal=Calendar.getInstance();       
int y=cal.get(Calendar.YEAR);       int m=cal.get(Calendar.MONTH);      
int d=cal.get(Calendar.DATE);       int
h=cal.get(Calendar.HOUR_OF_DAY);       int
mi=cal.get(Calendar.MINUTE);       int s=cal.get(Calendar.SECOND);