Java中Date Calendar SimpleDateFormat的相互转换

1 import java.text.ParseException; 2 import java.text.SimpleDateFormat; 3 import java.util.Calendar; 4 import java.util.Date; 5 6 public class MyUseSimpleDateFormat { 7public static void main(String[] args) { 8 /** 9* Date类通过getTime()返回long10* 通过void setTime（long time）设置时间11*/12 Date date = new Date();13 long time = date.getTime();14 date.setTime(time);15 /**16* SimpleDateFormat通过format（）格式化为字符串17* 通过parse（String str）转为Date18*/19 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");20 System.out.println(sdf.format(date));21 try {22 Date newDate = sdf.parse("1998-11-22 12:22:153");23 System.out.println(newDate);24 } catch (ParseException e) {}25 /**26* Calendar通过getTime（）方法转为Date27* Date通过setTime设置Calendar28*/29 Calendar cal = Calendar.getInstance();30 Date dt = cal.getTime();31 System.out.println(dt);32 cal.setTime(dt);33}34 }