/**
     * Description: 獲取GMT8時間
     * @return 將當前時間轉換為GMT8時區后的Date
     */
    public static Date getGMT8Time(){
        Date gmt8 = null;
        try {
            Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("GMT+8"),Locale.CHINESE);
            Calendar day = Calendar.getInstance();
            day.set(Calendar.YEAR, cal.get(Calendar.YEAR));
            day.set(Calendar.MONTH, cal.get(Calendar.MONTH));
            day.set(Calendar.DATE, cal.get(Calendar.DATE));
            day.set(Calendar.HOUR_OF_DAY, cal.get(Calendar.HOUR_OF_DAY));
            day.set(Calendar.MINUTE, cal.get(Calendar.MINUTE));
            day.set(Calendar.SECOND, cal.get(Calendar.SECOND));
            gmt8 = day.getTime();
        } catch (Exception e) {
            System.out.println("獲取GMT8時間 getGMT8Time() error !");
            e.printStackTrace();
            gmt8 = null;
        }
        return  gmt8;
    }