Calendar日历类型

Calendar cal = Calendar.getInstance();

int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH);
int date = cal.get(Calendar.DATE);

int dayOfYear = cal.get(Calendar.DAY_OF_YEAR);
int week = cal.get(Calendar.DAY_OF_WEEK);

System.out.println(year+"/"+(month+1)+"/"+date+" 周:"+(week == 1 ? 7:week-1)+" 今年的第:"+dayOfYear+"天");

Date dateTime = cal.getTime();
SimpleDateFormat fmt = new SimpleDateFormat();
System.out.println(fmt.format(dateTime));