1.Calendar 轉(zhuǎn)化 String

Calendar calendat = Calendar.getInstance();

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

String dateStr = sdf.format(calendar.getTime());

2.String 轉(zhuǎn)化Calendar

String str="2012-5-27";

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

Date date =sdf.parse(str);

Calendar calendar = Calendar.getInstance();

calendar.setTime(date);

3.Date 轉(zhuǎn)化String

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

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

4.String 轉(zhuǎn)化Date

String str="2012-5-27";

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

Date date= sdf.parse(str);

5.Date 轉(zhuǎn)化Calendar

Calendar calendar = Calendar.getInstance();

calendar.setTime(newJava.util.Date());

6.Calendar轉(zhuǎn)化Date

Calendar calendar = Calendar.getInstance();

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

7.String 轉(zhuǎn)成 Timestamp

Timestamp ts = Timestamp.valueOf("2012-1-14 08:11:00");

8.Date 轉(zhuǎn) TimeStamp

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String time = df.format(new Date());

Timestamp ts = Timestamp.valueOf(time);

Timestamp轉(zhuǎn)化為String:

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//定義格式，不顯示毫秒

Timestamp now = new Timestamp(System.currentTimeMillis());//獲取系統(tǒng)當(dāng)前時間

String str = df.format(now);

String轉(zhuǎn)化為Timestamp:

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String time = df.format(new Date());

Timestamp ts = Timestamp.valueOf(time);