判断当前日期是否是当月数据

/**
     *获取当月的开始日期
     *@author: lkf
     *@Date: 2017/9/13 11:16
     */
    public static Date getCurrentMonthStartTime() {
        SimpleDateFormat shortSdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        Date now = null;
        try {
            c.set(Calendar.DATE, 1);
            now = shortSdf.parse(shortSdf.format(c.getTime()));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return now;
    }
    /**
     *获取当月的结束日期
     *@author: lkf
     *@Date: 2017/9/13 11:16
     */
    public static Date getCurrentMonthEndTime() {
        SimpleDateFormat shortSdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        Date now = null;
        try {
            c.set(Calendar.DATE, 1);
            c.add(Calendar.MONTH, 1);
            c.add(Calendar.DATE, -1);
            now = shortSdf.parse(shortSdf.format(c.getTime()));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return now;
    }

public static void main(String[] args) {
        Date date = DateUtils.formatDate("2017-09-30","yyyy-MM-dd");
        Date a = getCurrentMonthStartTime();
        Date b = getCurrentMonthEndTime();
        if(date.getTime() >= a.getTime() && date.getTime() <= b.getTime()){
            System.out.println("是当月数据");
        }else{
            System.out.println("不是当月数据");
        }
    }