java中得到当前时间

1: java.sql.Timestamp   a   =   new   java.sql.Timestamp(System.currentTimeMillis()); 2: java.util.Date   a   =   new   java.util.Date(); theDate=new   java.util.Date();//得到当前的日期和时间,如   2003-06-03   08:00:00 3: java.util.Date   a; a.setTime(System.currentTimeMillis());

 

4:

currTime=new   java.sql.Time(new   java.util.Date().getTime());//得到当前时间。 如   08:00:00 currDate=new   java.sql.Date(new   java.util.Date().getTime());//得到当前日期。 如   2003-06-03

 

5:

                Date   date   =   Calendar.getInstance().getTime();                 SimpleDateFormat   sdf   =   new   SimpleDateFormat( "yyyy/MM/dd   HH:MM:SS ");                 String   sDate   =   sdf.format(date);

 

6:

Calendar   todaysDate   =   new   GregorianCalendar(); year   =   todaysDate.get(Calendar.YEAR); month   =   todaysDate.get(Calendar.MONTH)   +   1; day   =   todaysDate.get(Calendar.DAY_OF_MONTH); hourOfDay   =   todaysDate.get(Calendar.HOUR_OF_DAY);     //   24小时制 hour   =   todaysDate.get(Calendar.HOUR);                   //   12小时制 minute   =   todaysDate.get(Calendar.MINUTE); second   =   todaysDate.get(Calendar.SECOND);

 

7: Date(int year, int month, int date) ... 使用api, 查看Date constructor.

Deprecated. As of JDK version 1.1, replaced by Calendar.set(year + 1900, month, date) or GregorianCalendar(year + 1900, month, date).

public static void main(String[] args) { System.out.println(new GregorianCalendar(19 + 1900, 1, 4).getTime()); }

 

Result: Tue Feb 04 00:00:00 CST 1919

得到指定时间:

System.out.println(new GregorianCalendar(19 + 1900, 1, 4,9,9,9).getTime());

Result:  Tue Feb 04 09:09:09 CST 1919

 

8:SimpleDateFormat constructor

DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd"); DateFormat format 2= new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒"); Date date = null; String str = null; // String转Date str = "2007-1-18"; try { date = format1.parse(str); data = format2.parse(str); } catch (ParseException e) { e.printStackTrace(); } //Date转String date=new Date(); str=format1.format(date); str=format2.format(date);