Date、String、Calendar類型之間的轉化

1.Calendar 轉化 String 

//獲取當前時間的具體狀況,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 轉化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 轉化String

SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

String dateStr=sdf.format(new Date());

 

4.String 轉化Date 

String str="2010-5-27";

SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");

Date birthday = sdf.parse(str);

 

5.Date 轉化Calendar

Calendar calendar = Calendar.getInstance();

calendar.setTime(new java.util.Date());

 

6.Calendar轉化Date

Calendar calendar = Calendar.getInstance();

java.util.Date date =calendar.getTime();