/**

     * 获取date1相距date2多少天， date2>date1

     * @param date1

     * @param date2

     * @return

     * @throws ParseException

     */

    public static int getDaysSpace(String date1,String date2){

        Calendar cal = Calendar.getInstance();

        cal.setTime(getDate(date1, "yyyyMMdd"));

        long time1 = cal.getTimeInMillis();

        cal.setTime(getDate(date2, "yyyyMMdd"));

        long time2 = cal.getTimeInMillis();

        long between_days=(time2-time1)/(1000*3600*24);

        return Integer.parseInt(String.valueOf(between_days));

    }

 

    /**

     * 获取date1相距date2几个月， date2>date1

     * @param date1

     * @param date2

     * @return

     * @throws ParseException

     */

    public static float getMonthSpace(String date1, String date2){

        float result = 0;

        Calendar c1 = Calendar.getInstance();

        Calendar c2 = Calendar.getInstance();

        c1.setTime(getDate(date1, "yyyyMMdd"));

        c2.setTime(getDate(date2, "yyyyMMdd"));

        if(c2.get(Calendar.DATE) - c1.get(Calendar.DATE) >= 0){

            result = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) * 12.0f + (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH)) + (c2.get(Calendar.DATE) - c1.get(Calendar.DATE))/30.0f;

        }else{

            result = (c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR)) * 12.0f + (c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH)) - 1.0f + (c2.get(Calendar.DATE) - c1.get(Calendar.DATE))/30.0f;

        }

        DecimalFormat df = new DecimalFormat("0.00");

        return Float.parseFloat(df.format(result));

    }

 

    /**

     * 获取date1相距date2几年， date2>date1

     * @param date1

     * @param date2

     * @return

     * @throws ParseException

     */

    public static float getYearSpace(String date1, String date2) {

        DecimalFormat df = new DecimalFormat("0.00");

        return Float.parseFloat(df.format(getMonthSpace(date1, date2)/12.0f));

    }