一個月後的日期轉換

 Date dt= new Date();
                   Calendar cd = Calendar.getInstance();
                   cd.setTime(dt);
                   cd.add(Calendar.MONTH, 1);
                   java.text.SimpleDateFormat formatter_f = new java.text.SimpleDateFormat( "yyyy-MM-dd ");
                   String new_date_f = formatter_f.format(cd.getTime());
                   String date="'"+new_date_f+"'";