package com.myjava;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

public class MyCalendar {

    /**

     * @param args

     * @throws ParseException

     */

    public static void main(String[] args) throws ParseException {

        System.out.println(MyCalendar.getMonthSpace("1982-12-8", "2012-12-12"));

    }

/**

     *

     * @param date1 <String>

     * @param date2 <String>

     * @return int

     * @throws ParseException

     */

    public static int getMonthSpace(String date1, String date2)

            throws ParseException {

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

　　　　　　int result=0;
　　　　　　Calendar cal1 = new GregorianCalendar();
　　　　　　cal1.setTime(sdf.parse(date1));
　　　　　　cal2 = new GregorianCalendar();
　　　　　　cal2.setTime(sdf.parse(date2));
　　　　　　result =(cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR)) * 12 + cal1.get(Calendar.MONTH)- cal2.get(Calendar.MONTH);
　　　　　　return result==0?1 : Math.abs(result);

    }

}

     * @param date1 <String>

     * @param date2 <String>

     * @return int

     * @throws ParseException

     */

    public int getDateSpace(String date1, String date2)

            throws ParseException {

        int result = 0;

        Calendar calst = Calendar.getInstance();;

        Calendar caled = Calendar.getInstance();

        calst.setTime(parseDate("yyyyMMdd",date1));

        caled.setTime(parseDate("yyyyMMdd",date2));

         //设置时间为0时

         calst.set(Calendar.HOUR_OF_DAY, 0);

         calst.set(Calendar.MINUTE, 0);

         calst.set(Calendar.SECOND, 0);

         caled.set(Calendar.HOUR_OF_DAY, 0);

         caled.set(Calendar.MINUTE, 0);

         caled.set(Calendar.SECOND, 0);

        //得到两个日期相差的天数

         int days = ((int)(caled.getTime().getTime()/1000)-(int)(calst.getTime().getTime()/1000))/3600/24;   

        return days;

    }

public static final int daysBetween(Date early, Date late) { 

         java.util.Calendar calst = java.util.Calendar.getInstance();

         java.util.Calendar caled = java.util.Calendar.getInstance();

         calst.setTime(early);

          caled.setTime(late);

          //设置时间为0时

          calst.set(java.util.Calendar.HOUR_OF_DAY, 0);

          calst.set(java.util.Calendar.MINUTE, 0);

          calst.set(java.util.Calendar.SECOND, 0);

          caled.set(java.util.Calendar.HOUR_OF_DAY, 0);

          caled.set(java.util.Calendar.MINUTE, 0);

          caled.set(java.util.Calendar.SECOND, 0);

         //得到两个日期相差的天数

          int days = ((int) (caled.getTime().getTime() / 1000) - (int) (calst

                 .getTime().getTime() / 1000)) / 3600 / 24;   

         return days;

    }   

    public static void main(String[] args)

    {

         Date earlydate = new Date();

         Date latedate = new Date();

         DateFormat df = DateFormat.getDateInstance();

         try {

             earlydate = df.parse("2009-09-21");

             latedate = df.parse("2009-10-16");

         } catch (ParseException e) {

               e.printStackTrace();

           }

          int days = daysBetween(earlydate,latedate);

          System.out.println(days);

    }