产生流水号

第一种判断

                 String maxCardNumber = cardService.getMaxCardNumber();

                            DecimalFormat df = new DecimalFormat("1000000000000000");

                            if(maxCardNumber==null){

                                     long temp = 0 ;

                                     card.setCardNumber(df.format(++temp));

                            }else{

                                     long maxCardNumber1=Integer.valueOf(maxCardNumber.substring(1));

                                     card.setCardNumber(df.format(++maxCardNumber1));

                            }

 

第二种方式判断：

                 Stringmax=reService.getMaxpollutionCode(sb.toString()+"%");

                   long temp = 0 ;

                   temp = Integer.parseInt(max==null?"0":max.substring(8));

                   DecimalFormat df = new DecimalFormat("0000");

                   sb.append(df.format(++temp));

                   return sb.toString();