如何在Excel中添加其他工作表（如果第一張表已滿）

Question

我正在使用jExcel API將數據寫入Excel工作表。以下是我的代碼工作正常。但如果我寫大量的數據到Excel表，我得到這個異常 -

jxl.write.biff.RowsExceededException: The maximum number of rows permitted on 
a worksheet been exceeded 

以下是代碼。如果第一張紙不能再容納更多行，我怎樣才能將數據寫入另一張紙。有人可以幫我從這裏出去嗎？

public void write() throws IOException, WriteException { 

    readFileIPAddress(); 

    File file = new File(inputFile); 
    WorkbookSettings wbSettings = new WorkbookSettings(); 

    wbSettings.setLocale(new Locale("en", "EN")); 

    WritableWorkbook workbook = Workbook.createWorkbook(file, wbSettings); 
    workbook.createSheet("Report", 0); 
    WritableSheet excelSheet = workbook.getSheet(0); 
    createLabel(excelSheet); 
    createContent(excelSheet); 

    workbook.write(); 
    workbook.close(); 
    } 


    private void createLabel(WritableSheet sheet) throws WriteException { 

    WritableFont times15pt = new WritableFont(WritableFont.TAHOMA, 11); 
    times = new WritableCellFormat(times15pt); 
    times.setWrap(true); 

    WritableFont times10ptBoldUnderline = new WritableFont(WritableFont.TAHOMA, 13, WritableFont.BOLD, false, UnderlineStyle.SINGLE); 
    timesBoldUnderline = new WritableCellFormat(times10ptBoldUnderline); 
    timesBoldUnderline.setWrap(true); 

    CellView cv = new CellView(); 
    cv.setFormat(times); 
    cv.setFormat(timesBoldUnderline); 
    cv.setAutosize(true); 

    addCaption(sheet, 0, 0, "IP Address"); 
    addCaption(sheet, 1, 0, "Digital Element Country Code"); 
    addCaption(sheet, 2, 0, "Maxmind Country Code"); 
    addCaption(sheet, 3, 0, "Neustar City"); 
    addCaption(sheet, 4, 0, "Maxmind City"); 
    addCaption(sheet, 5, 0, "Neustar Zip Code"); 
    addCaption(sheet, 6, 0, "Maxmind Zip Code"); 
    } 

    private void createContent(WritableSheet sheet) throws WriteException, RowsExceededException { 

    NaEdgeDb edge = null; 
    try { 
    while (!workQueue.isEmpty()) { 
     String ipAddress = workQueue.take(); 

     edge = new NaEdgeDb(); 
     edge.set_server_addr(serverIPAddress); 
     edge.set_id(10); 
     if (checkIPDuplicate.add(ipAddress)) { 

      resp = GeoLocationService.getLocationIp(ipAddress, 0); 
      edge.naQueryEdge(ipAddress); 

      addNumber(sheet, 0, j, ipAddress); 

      addNumber(sheet, 1, j, (edge.edge_twoLetterCountry)); 

      addNumber(sheet, 2, j, (resp.getLocation() != null ? resp.getLocation().getCountry() : null)); 

      addNumber(sheet, 3, j, (edge.edge_city)); 

      addNumber(sheet, 4, j, (resp.getLocation() != null ? resp.getLocation().getCity() : null)); 

      addNumber(sheet, 5, j, (edge.edge_postalCode)); 

      addNumber(sheet, 6, j, (resp.getLocation() != null ? resp.getLocation().getZipCode() : null)); 
      j++; 
     } 
     } 
    } catch (Exception e) { 
     getLogger().log(LogLevel.ERROR, e.fillInStackTrace()); 
     e.printStackTrace(); 
    } 
    } 

    private void addCaption(WritableSheet sheet, int column, int row, String s) throws RowsExceededException, 
     WriteException { 
    Label label; 
    label = new Label(column, row, s, timesBoldUnderline); 
    sheet.addCell(label); 
    } 

    private void addNumber(WritableSheet sheet, int column, int row, String str) throws WriteException, 
     RowsExceededException { 
    Label number; 
    number = new Label(column, row, str); 
    sheet.addCell(number); 
    } 

更新的代碼： -

這仍然拋出同樣的異常。不知道爲什麼？我已經在此代碼中處理了新工作表的創建？這個代碼的任何問題？

private void createContent(WritableSheet sheet, WritableWorkbook workbook2) throws WriteException, RowsExceededException { 

    NaEdgeDb edge = null; 
    WritableSheet ws2 = workbook2.createSheet("sheet2", 2); 
    try { 
    while (!workQueue.isEmpty()) { 
     String ipAddress = workQueue.take(); // generateIPAddress(); 

     edge = new NaEdgeDb(); 
     edge.set_server_addr(serverIPAddress); 
     edge.set_id(10); 
     System.out.println(sheet.getRows()); 
     if (checkIPDuplicate.add(ipAddress) && sheet.getRows() <= 65536) { 

      resp = GeoLocationService.getLocationIp(ipAddress, 0); 
      edge.naQueryEdge(ipAddress); 

      addNumber(sheet, 0, j, ipAddress); 

      addNumber(sheet, 1, j, (edge.edge_twoLetterCountry)); 

      addNumber(sheet, 2, j, (resp.getLocation() != null ? resp.getLocation().getCountry() : null)); 

      addNumber(sheet, 3, j, (edge.edge_city)); 

      addNumber(sheet, 4, j, (resp.getLocation() != null ? resp.getLocation().getCity() : null)); 

      addNumber(sheet, 5, j, (edge.edge_postalCode)); 

      addNumber(sheet, 6, j, (resp.getLocation() != null ? resp.getLocation().getZipCode() : null)); 
      j++; 
     } else { 
      resp = GeoLocationService.getLocationIp(ipAddress, 0); 
      edge.naQueryEdge(ipAddress); 

      addNumber(ws2, 0, j, ipAddress); 

      addNumber(ws2, 1, j, (edge.edge_twoLetterCountry)); 

      addNumber(ws2, 2, j, (resp.getLocation() != null ? resp.getLocation().getCountry() : null)); 

      addNumber(ws2, 3, j, (edge.edge_city)); 

      addNumber(ws2, 4, j, (resp.getLocation() != null ? resp.getLocation().getCity() : null)); 

      addNumber(ws2, 5, j, (edge.edge_postalCode)); 

      addNumber(ws2, 6, j, (resp.getLocation() != null ? resp.getLocation().getZipCode() : null)); 
      k++; 
     } 
     } 
    } catch (Exception e) { 
     getLogger().log(LogLevel.ERROR, e.fillInStackTrace()); 
     e.printStackTrace(); 
    } 
    System.out.println("Size of HashSet:" + checkIPDuplicate.size()); 
    } 

Answer 1

我認爲你可以使用WritableWorkbook#createSheet(java.lang.String, int)）在需要時創建新工作表。

代替WritableSheet，通過WritableWorkbook的createContent方法。使用某個計數器檢查當前工作表中添加的行數。如果工作表已滿（計數器== MAX_ROWS），則創建一個新工作表並將行計數器重置爲0.