1.Calendar 转化 String //获取当前时间的具体情况,如年,月,日,week,date,分,秒等 Calendar calendat = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); String date = sdf.format(calendar.getTime());
2.String 转化Calendar
String str="2010-5-27"; SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");
Date date =sdf.parse(str);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
3.Date 转化String
SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");
String dateStr=sdf.format(new Date());
4.String 转化Date String str="2010-5-27";
SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");
Date birthday = sdf.parse(str);
5.Date 转化Calendar
Calendar calendar = Calendar.getInstance(); calendar.setTime(new java.util.Date());
6.Calendar转化Date
Calendar calendar = Calendar.getInstance(); java.util.Date date =calendar.getTime();
7.Calendar转long
long l = ca.getTimeInMillis(); ca.setTime(d); ca.setTimeInMillis(l);
8、Calendar加减时间
calendar.setTime(date);//時間转calendar calendar.add(Calendar.DAY_OF_MONTH, 1);//加减时间,前面:时分秒,后门是值,值可以为负数,就是减时间