import java.util.*;
int y,m,d,h,mm;Calendar c = Calendar.getInstance();y = c.get(Calendar.YEAR); //年m = c.get(Calendar.MONTH) + 1; //月d = c.get(Calendar.DAY_OF_MONTH); //日h = c.get(Calendar.HOUR); //时（HOUR——十二小时制；HOUR_OF_DAY——二十四小时制）mm = c.get(Calendar.MINUTE); //分
2:java.util.Date d = new java.util.Date();java.text.SimpleDateFormat dformat = new java.text.SimpleDateFormat("yyyy-MM-dd");String datetime = dformat.format(d);System.out.println(datetime);
3:import java.util.*;import java.text.*;
Dat