/**    * @Description: 当前日期加上n个月返回long date     */    public static long getLongDateAddMonth(int n){        Calendar cd=Calendar.getInstance();        Date date=new Date();        cd.setTime(date);        cd.add(Calendar.MONTH, n); //将当前日期加n个月        return cd.getTime().getTime();    }        /**     * @Description 当前日期加上n天返回long date*/    public static long getLongDateAddDay(int n){        Calendar cd = Calendar.getInstance();        Date date = new Date();        cd.setTime(date);        cd.add(Calendar.DAY_OF_MONTH, n);        return cd.getTime().getTime();    }