Calendar c=Calendar.getInstance();

System.out.println(c.get(Calendar.YEAR));
System.out.println(c.get(Calendar.MONTH));  //月 0-11 ,所以用的时候需要+1
System.out.println(c.get(Calendar.DAY_OF_MONTH));  //0-..
System.out.println(c.get(Calendar.DAY_OF_WEEK));  //1-7 对应 周日-周六,可以用查表法获取星期..