Question

我正在使用Boxable库创建PDF文件，在其中打印数字序列。 PDF中的每一页将有10行和5列，在第10行之后，将添加一个新页面以打印其余的数字，依此类推。这是代码，可以正常工作。

   public void createPdfColumnWise() throws IOException {
    float margin = 20;
    int firstNumber = 105;
    int lastNumber = 1005;
    int[] intArray = IntStream.range(firstNumber, lastNumber + 1).toArray();

    PDDocument doc = new PDDocument();
    PDPage page = new PDPage(PDRectangle.A4);

    doc.addPage(page);
    BaseTable table = pdfTable(margin, doc, page);
    int j = 0;
    int row = 0;
    while (j < intArray.length) {
      row ++;
      if(row > 10) {
      //if(row > 40) {  
        table.removeAllBorders(true);
        table.draw();
        row = 1;// reset
        page = new PDPage(PDRectangle.A4);
        doc.addPage(page);
        table = pdfTable(margin, doc, page);
      }
      Row<PDPage> imageRow = table.createRow(25f);
      Cell<PDPage> cell = imageRow.createCell(8f, "");
      cell.setFontSize(6f); 
      cell = imageRow.createCell(10f,row + ")");
      cell.setFontSize(6f);
      for (int i = 0; i < 5; i++) {
        if (j >= intArray.length) break;      
        String textValue =  String.valueOf(intArray[j]);
        cell  = imageRow.createCell(7f, textValue, HorizontalAlignment.RIGHT, VerticalAlignment.MIDDLE);
        cell.setTopPadding(6f);
        cell.setBottomPadding(6f);
        cell.setFontSize(12f);       
        j++;
      }
    }
    table.removeAllBorders(true);
    table.draw();
    String userHome = System.getProperty("user.home");
    File file = new File(userHome + "/Downloads/" + "Output.pdf");
    Files.createParentDirs(file);
    doc.save(file);
    doc.close();
  }


private BaseTable pdfTable(float margin, PDDocument doc, PDPage page) throws IOException {

    float tableWidth = page.getMediaBox().getWidth() - (2 * margin);
    float yLocationNewPage = page.getMediaBox().getHeight() - (2 * margin);
    boolean drawContent = true;
    boolean drawLines = true;
    float yStartPoint = yLocationNewPage + 50;
    float bottomMargin = 15;
    yStartPoint -= FontUtils.getHeight(PDType1Font.COURIER, 14) + 15;
    BaseTable table = new BaseTable(yStartPoint, yLocationNewPage, bottomMargin, tableWidth, margin, doc,
        page, drawLines, drawContent);
    return table;
  }

现在这将打印如下所示的值：

现在，我想知道是否可以按以下所示的格式打印值，以使数字序列按列递增：

所以我需要一种逻辑，即按行打印值，但按列打印数字序列。到目前为止，我能够使第一行正确，但是从第二行我无法使它起作用：

  public void createPdfColumnWise() throws IOException {
    float margin = 20;
    int firstNumber = 105;
    int lastNumber = 1005;
    int[] intArray = IntStream.range(firstNumber, lastNumber + 1).toArray();

    Stream<Integer> stream = Arrays.stream(intArray).boxed();
    Integer lastNum = stream.reduce((a, b) -> b).orElse(null);

    PDDocument doc = new PDDocument();
    PDPage page = new PDPage(PDRectangle.A4);

    doc.addPage(page);
    BaseTable table = pdfTable(margin, doc, page);
    int j = 0;
    int row = 0;
    while (j < intArray.length) {
      row ++;
      if(row > 10) {
      //if(row > 40) {  
        table.removeAllBorders(true);
        table.draw();
        row = 1;// reset
        page = new PDPage(PDRectangle.A4);
        doc.addPage(page);
        table = pdfTable(margin, doc, page);
      }
      Row<PDPage> imageRow = table.createRow(25f);
      Cell<PDPage> cell = imageRow.createCell(8f, "");
      cell.setFontSize(6f); 
      cell = imageRow.createCell(10f,row + ")");
      cell.setFontSize(6f);
      for (int i = 0; i < 5; i++) {
        if (j >= intArray.length) break;  
        String textValue = null;
        if(i != 0 && (intArray[j] + 9) < lastNum) {
          textValue =  String.valueOf(intArray[j] + ( 9 * i));
        } else {
          textValue =  String.valueOf(intArray[j] );
        }
        cell  = imageRow.createCell(7f, textValue, HorizontalAlignment.RIGHT, VerticalAlignment.MIDDLE);
        cell.setTopPadding(6f);
        cell.setBottomPadding(6f);
        cell.setFontSize(12f);       
        j++;
      }
    }
    table.removeAllBorders(true);
    table.draw();
    String userHome = System.getProperty("user.home");
    File file = new File(userHome + "/Downloads/" + "Output.pdf");
    Files.createParentDirs(file);
    doc.save(file);
    doc.close();
  }

要使用boxable，您需要在POM中具有以下依赖性：

    <dependency>
        <groupId>com.github.dhorions</groupId>
        <artifactId>boxable</artifactId>
        <version>1.5</version>
    </dependency>

Answer 1

让我给你一个例子：

您如何看待这个想法？希望这可以帮助您解决问题。

按行打印数字系列，但按列打印

1 个答案: