Java操作时间

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Java F#

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;

/**
* @author Administrator
*/
public class OperationTime {

/**
*
*/
public OperationTime() {
// TODO Auto-generated constructor stub
}

/**
* @param args
*/
public static void main(String[] args) {
 try {
 java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat("M/dd/yyyy hh:mm:ss a",java.util.Locale.US);
 java.util.Date d = sdf.parse("5/13/2003 10:31:37 AM");
 System.out.println(d);
 System.out.println(" ");
 SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 String mDateTime1=formatter.format(d);
 System.out.println(mDateTime1);
 System.out.println(" ");
 System.out.println(d.getTime());
 System.out.println(" ");

//当前时间
 Calendar cal = Calendar.getInstance();
 // SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 //SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss G E D F w W a E F");
 String mDateTime=formatter.format(cal.getTime());
 System.out.println(mDateTime);
 System.out.println(" ");

//1年前日期
 java.util.Date myDate=new java.util.Date();
 long myTime=(myDate.getTime()/1000)-60*60*24*365;
 myDate.setTime(myTime*1000);
 String mDate=formatter.format(myDate);
 System.out.println(mDate);
 System.out.println(" ");

//明天日期
 myDate=new java.util.Date();
 myTime=(myDate.getTime()/1000)+60*60*24;
 myDate.setTime(myTime*1000);
 mDate=formatter.format(myDate);
 System.out.println(mDate);
 System.out.println(" ");

//两个时间之间的天数
 SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
 java.util.Date date= myFormatter.parse("2003-05-1");
 java.util.Date mydate= myFormatter.parse("1899-12-30");
 long day=(date.getTime()-mydate.getTime())/(24*60*60*1000);
 System.out.println(day);
 System.out.println(" ");

//加半小时
 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
 java.util.Date date1 = format.parse("2002-02-28 23:16:00");
 long Time=(date1.getTime()/1000)+60*30;
 date1.setTime(Time*1000);
 String mydate1=formatter.format(date1);
 System.out.println(mydate1);
 System.out.println(" ");

//年月周求日期
 SimpleDateFormat formatter2 = new SimpleDateFormat("yyyy-MM F E");
 java.util.Date date2= formatter2.parse("2003-05 5 星期五");
 SimpleDateFormat formatter3 = new SimpleDateFormat("yyyy-MM-dd");
 String mydate2=formatter3.format(date2);
 System.out.println(mydate2);
 System.out.println(" ");

//求是星期几
 mydate= myFormatter.parse("2001-1-1");
 SimpleDateFormat formatter4 = new SimpleDateFormat("E");
 String mydate3=formatter4.format(mydate);
 System.out.println(mydate3);
 System.out.println(" ");
 } catch (ParseException e) {
 e.printStackTrace();
 }
}
}

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