下面这个方面可能产生大内存吗?如果EXCEL有2000~5000行数据的话?

public List getExcelList(InputStream inputStream,List errorMsgList,List warningMsgList,String roleType)     throws Exception {         List excelList = new ArrayList();        jxl.Workbook rwb = Workbook.getWorkbook(inputStream);      Sheet rs = rwb.getSheet(0);      int rows = rs.getRows();      Cell cell = null;      InvoiceModifyEntity entity = null;        String strs[] = MyUtil.getAttributeHeadInfoToEntity(rs);          for (int j = 2; j < rows; j++){       cell = rs.getCell(0, j);       if(cell.getContents() !=null && cell.getContents().length()>0){              //跳过处理        if(this.isSkipRow(rs,j))         continue;        entity = new InvoiceModifyEntity();          entity.setAttr_inds(strs[0]);        entity.setAttr_codes(strs[1]);        describeModifyHeader(entity,j,rs,errorMsgList,warningMsgList);        MyUtil.setAttributeValueByEnity(entity, rs, j,errorMsgList,warningMsgList,roleType);        MyUtil.validateInvoiceCurrencyAndAmt(entity, j, errorMsgList, warningMsgList,36);        excelList.add(entity);              //超过最大错误数量，则不再处理        if(isOverErrorCount(errorMsgList))         break;       }      }      return excelList;     }