0.java中的Time Date Calendar 的应用

1. java class：

package com.cargosmart.ssm.util;

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

public class aaa {
public static void main(String[] args) throws ParseException {
String strDate = "2008-09-21";
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date myDate = null;
myDate = dateFormat.parse(strDate);
System.out.println("MyDate Input : :" + myDate.toString());

Date now = new Date();
System.out.println("Date time : "+now.toString());

Calendar cal = Calendar.getInstance();
cal.setTime(myDate);

System.out.println("Calendar time : "+cal.getTime());
DateFormat shortDateFormat = DateFormat.getDateTimeInstance();
System.out.println("ShortDateFormat time is : "+shortDateFormat.format(cal.getTime()));

}
}

2. 输出结果如下：
MyDate Input : :Sun Sep 21 00:00:00 GMT+08:00 2008
Date time : Sun Sep 21 12:47:34 GMT+08:00 2008
Calendar time : Sun Sep 21 00:00:00 GMT+08:00 2008
ShortDateFormat time is : Sep 21, 2008 12:00:00 AM

3.yyyy-MM-dd 注意：MM是大写的。mm是表示的秒 in SimpleDateFormat 。