자바를 통해 생성 된 Excel 시트에 정수 값을 설정하는 방법은 무엇입니까?

Question

자바를 통해 Excel 시트를 만들 때, 오라클 테이블에 number 데이터 유형을 가진 열이 text 형식으로 변환됩니다. number 형식으로 유지하고 싶습니다. 아래 코드는 Excel 작성을위한 코드입니다.

public boolean prepareExcelFilefromQuery(String chanType, 
        Collection<List> queryDataRowWise, HttpServletResponse response) 

      { 
       List<String> queryDataColWise; 
       HSSFRow row = null; 
       HSSFCell cell = null; 
       Integer rowCounter = 0; 
       Integer colCounter; 
       boolean success = false; 
       try { 

        Iterator<List> rowIterator = queryDataRowWise.iterator(); 
        HSSFWorkbook workbook = new HSSFWorkbook(); 
        HSSFSheet sheet = workbook.createSheet(chanType + " Report"); 
        System.out.println("First row/..." + sheet.getFirstRowNum()); 
        while (rowIterator.hasNext()) { 
         colCounter = 0; 

         queryDataColWise = (List) rowIterator.next(); 
         Iterator colIterator = queryDataColWise.iterator(); 

         row = sheet.createRow(rowCounter++); 
         while (colIterator.hasNext()) { 
          cell = row.createCell(colCounter++); 
          Object o = colIterator.next(); 

          if (o instanceof java.lang.String) { 
           String s = (String) o; 
           cell.setCellValue(s); 
          } else if (o instanceof java.lang.Double) { 
           Double d = (Double) o; 
           cell.setCellValue(d); 
          } else if (o instanceof java.lang.Integer) { 
           Integer i = (Integer) o; 
           cell.setCellType(cell.CELL_TYPE_NUMERIC); 
           cell.setCellValue(i); 
          } else if (o instanceof java.util.Date) { 
           Date date = (Date) o; 

           SimpleDateFormat FORMATTER; 

           FORMATTER = new SimpleDateFormat("MM/dd/yyyy"); 
           String date11 = FORMATTER.format(date); 
           HSSFCellStyle cellStyle = workbook.createCellStyle(); 
           cellStyle.setDataFormat(HSSFDataFormat 
             .getBuiltinFormat("m/d/yy")); 
           cell.setCellStyle(cellStyle); 
           cell.setCellValue(FORMATTER.parse(date11)); 
          } 
         } 
        } 

        workbook.write(response.getOutputStream()); 
        success = true; 

       } catch (Exception e) { 
        logger.debug(
          "Exception caught in prepareExcelFilefromQuery class ", e); 
        System.out 
          .println("Exception caught in prepareExcelFilefromQuery class "); 
        e.printStackTrace(); 

       } 
       } 
       return success; 
      } 

Answer 1

과 같은 형식 만 사용하면됩니다. More Format

CellStyle numberStyle = wb.createCellStyle(); 
numberStyle.setDataFormat(format.getFormat("0")); 

CellStyle dateStyle = wb.createCellStyle(); 
dateStyle.setDataFormat(format.getFormat("d-mmm-yy"));