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jExcel APIif one sheet is fullを使用して、Java で複数の Excel シートを作成する必要があります(65536 rows)。あるシートがいっぱいになった場合、次のシートでは、最初のシートで中断したところから自動的に書き込みを開始するとします。1つのシートがいっぱいになるたびに動的に作成するロジックを配置することに固執しています。以下は、これまでに行ったコードです。

public void write() throws IOException, WriteException {
    File file = new File(inputFile);
    WorkbookSettings wbSettings = new WorkbookSettings();

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

    WritableWorkbook workbook = Workbook.createWorkbook(file, wbSettings);

    writingToExcel(workbook);
}


//Logic to create sheet dyanmically if one is full should be done here I guess?
private void writingToExcel(WritableWorkbook workbook) {

    workbook.createSheet("Report", 0);
    WritableSheet excelSheet = workbook.getSheet(0);
    try {
        createLabel(excelSheet);
        createContent(excelSheet);
    } catch (WriteException e) {
        e.printStackTrace();
    } finally {
        try {
            workbook.write();
            workbook.close();   
        } catch (IOException e) {
            e.printStackTrace();
        } catch (WriteException e) {
            e.printStackTrace();
        }

    }
}

private void createLabel(WritableSheet sheet) throws WriteException {

    WritableFont times10pt = new WritableFont(WritableFont.TIMES, 10);
    times = new WritableCellFormat(times10pt);
    times.setWrap(true);

    WritableFont times10ptBoldUnderline = new WritableFont(WritableFont.TIMES, 10, 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);

    // Write a few headers
    addCaption(sheet, 0, 0, "Header 1");
    addCaption(sheet, 1, 0, "This is another header");

}

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

    for (int i = 1; i < 70000; i++) {
        addNumber(sheet, 0, i, i + 10);
        addNumber(sheet, 1, i, i * i);
    }
}

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,
        Integer integer) throws WriteException, RowsExceededException {
    Number number;
    number = new Number(column, row, integer, times);
    sheet.addCell(number);
}

そのロジックをコードに追加する方法がわかりません。

どんな提案も大いに役立ちますか?

または、いずれにせよ、1 つのシートがいっぱいになった場合に別のシート (2 番目のシート) に自動的に書き込みを開始する簡単な例を誰かに教えてもらえますか?

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2 に答える 2

4

次の2つの方法に変更を加えました：-

private void writingToExcel(WritableWorkbook workbook) {
    try {
        // don't create a sheet now, instead, pass it in the workbook
        createContent(workbook);
    }
    catch (WriteException e) {
        e.printStackTrace();
    }
    finally {
        try {
            workbook.write();
            workbook.close();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        catch (WriteException e) {
            e.printStackTrace();
        }

    }
}

// instead of taking a sheet, take a workbook because we cannot ensure if the sheet can fit all the content at this point
private void createContent(WritableWorkbook workbook) throws WriteException {

    int excelSheetIndex = 0;
    int rowIndex = 0;
    WritableSheet excelSheet = null;

    for (int i = 1; i < 70000; i++) {

        // if the sheet has hit the cap, then create a new sheet, new label row and reset the row count
        if (excelSheet == null || excelSheet.getRows() == 65536) {
            excelSheet = workbook.createSheet("Report " + excelSheetIndex, excelSheetIndex++);
            createLabel(excelSheet);
            rowIndex = 0;
        }

        // instead of using i for row, use rowIndex
        addNumber(excelSheet, 0, rowIndex, i + 10);
        addNumber(excelSheet, 1, rowIndex, i * i);

        // increment the sheet row
        rowIndex++;
    }
}
于 2013-01-12T04:28:59.710 に答える