Date、String、Calendar三个部类之间的转化

Date、String、Calendar三个类型之间的转化

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 dateStr = 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();