Java PdfReader.getCropBox方法代碼示例

import com.itextpdf.text.pdf.PdfReader; //導入方法依賴的package包/類
/**
 * <a href="http://stackoverflow.com/questions/34394199/i-cant-rotate-my-page-from-existing-pdf">
 * I can't rotate my page from existing PDF
 * </a>
 * <p>
 * Switching between portrait and landscape like this obviously will cut off some parts of the page.
 * </p>
 */
@Test
public void testSwitchOrientation() throws DocumentException, IOException
{
    try (InputStream resourceStream = getClass().getResourceAsStream("/mkl/testarea/itext5/extract/n2013.00849449.pdf"))
    {
        PdfReader reader = new PdfReader(resourceStream);
        int n = reader.getNumberOfPages();
        PdfDictionary pageDict;
        for (int i = 1; i <= n; i++) {
            Rectangle rect = reader.getPageSize(i);
            Rectangle crop = reader.getCropBox(i);
            pageDict = reader.getPageN(i);
            pageDict.put(PdfName.MEDIABOX, new PdfArray(new float[] {rect.getBottom(), rect.getLeft(), rect.getTop(), rect.getRight()}));
            pageDict.put(PdfName.CROPBOX, new PdfArray(new float[] {crop.getBottom(), crop.getLeft(), crop.getTop(), crop.getRight()}));
        }
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(new File(RESULT_FOLDER, "n2013.00849449-switch.pdf")));
        stamper.close();
        reader.close();
    }
}
 

import com.itextpdf.text.pdf.PdfReader; //導入方法依賴的package包/類
/**
 * This methods creates a copy of the source document containing each page twice,
 * once with the cropbox limited to the left half page, once to the right one.
 */
void splitIntoHalfPages(InputStream source, File target) throws IOException, DocumentException
{
    final PdfReader reader = new PdfReader(source);
    
    try (   OutputStream targetStream = new FileOutputStream(target)    )
    {
        Document document = new Document();
        PdfCopy copy = new PdfCopy(document, targetStream);
        document.open();

        for (int page = 1; page <= reader.getNumberOfPages(); page++)
        {
            PdfDictionary pageN = reader.getPageN(page);
            Rectangle cropBox = reader.getCropBox(page);
            PdfArray leftBox = new PdfArray(new float[]{cropBox.getLeft(), cropBox.getBottom(), (cropBox.getLeft() + cropBox.getRight()) / 2.0f, cropBox.getTop()});
            PdfArray rightBox = new PdfArray(new float[]{(cropBox.getLeft() + cropBox.getRight()) / 2.0f, cropBox.getBottom(), cropBox.getRight(), cropBox.getTop()});

            PdfImportedPage importedPage = copy.getImportedPage(reader, page);
            pageN.put(PdfName.CROPBOX, leftBox);
            copy.addPage(importedPage);
            pageN.put(PdfName.CROPBOX, rightBox);
            copy.addPage(importedPage);
        }
        
        document.close();
    }
    finally
    {
        reader.close();
    }
}
 

import com.itextpdf.text.pdf.PdfReader; //導入方法依賴的package包/類
public Collection<Rectangle2D> find(PdfReader reader, float minWidth, float minHeight, int page) throws IOException
{
    Rectangle cropBox = reader.getCropBox(page);
    Rectangle2D crop = new Rectangle2D.Float(cropBox.getLeft(), cropBox.getBottom(), cropBox.getWidth(), cropBox.getHeight());
    FreeSpaceFinder finder = new FreeSpaceFinder(crop, minWidth, minHeight);
    PdfReaderContentParser parser = new PdfReaderContentParser(reader);
    parser.processContent(page, finder);
    return finder.freeSpaces;
}
 

import com.itextpdf.text.pdf.PdfReader; //導入方法依賴的package包/類
public Collection<Rectangle2D> findExt(PdfReader reader, float minWidth, float minHeight, int page) throws IOException
{
    Rectangle cropBox = reader.getCropBox(page);
    Rectangle2D crop = new Rectangle2D.Float(cropBox.getLeft(), cropBox.getBottom(), cropBox.getWidth(), cropBox.getHeight());
    FreeSpaceFinder finder = new FreeSpaceFinderExt(crop, minWidth, minHeight);
    PdfReaderContentParser parser = new PdfReaderContentParser(reader);
    parser.processContent(page, finder);
    return finder.freeSpaces;
}
 

import com.itextpdf.text.pdf.PdfReader; //導入方法依賴的package包/類
/**
 * <a href="http://stackoverflow.com/questions/41949253/how-to-add-columntext-as-an-annotation-in-itext-pdf">
 * How to add columnText as an annotation in itext pdf
 * </a>
 * <p>
 * This test demonstrates how to use a columntext in combination with an annotation.
 * </p>
 */
@Test
public void testAddAnnotationLikeJasonY() throws IOException, DocumentException
{
    String html ="<html><h1>Header</h1><p>A paragraph</p><p>Another Paragraph</p></html>";
    String css = "h1 {color: red;}";
    ElementList elementsList = XMLWorkerHelper.parseToElementList(html, css);

    try (   InputStream resource = getClass().getResourceAsStream("/mkl/testarea/itext5/extract/test.pdf");
            OutputStream result = new FileOutputStream(new File(RESULT_FOLDER, "JasonY.pdf"))   )
    {
        PdfReader reader = new PdfReader(resource);
        PdfStamper stamper = new PdfStamper(reader, result);

        Rectangle cropBox = reader.getCropBox(1);

        PdfAnnotation annotation = stamper.getWriter().createAnnotation(cropBox, PdfName.FREETEXT);
        PdfAppearance appearance = PdfAppearance.createAppearance(stamper.getWriter(), cropBox.getWidth(), cropBox.getHeight());

        ColumnText ct = new ColumnText(appearance);
        ct.setSimpleColumn(new Rectangle(cropBox.getWidth(), cropBox.getHeight()));
        elementsList.forEach(element -> ct.addElement(element));
        ct.go();

        annotation.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, appearance);
        stamper.addAnnotation(annotation, 1);

        stamper.close();
        reader.close();
    }
}
 

import com.itextpdf.text.pdf.PdfReader; //導入方法依賴的package包/類
/**
 * <a href="http://stackoverflow.com/questions/32448118/issue-in-removing-header-and-footer-in-pdf-using-itext-pdf">
 * Issue in Removing Header and Footer in PDF using iText PDF
 * </a>
 * <br/>
 * <a href="https://www.dropbox.com/s/xznwx4ogemsgd42/spec.pdf?dl=0">
 * spec.pdf
 * </a>
 * <p>
 * removes header and footer based on the configuration
 * </p>
 * <p>
 * This is the original code by the OP whith minor changes to render it runnable
 * in this testarea project.
 * </p>
 * <p>
 * Issues observed on landscape pages of the test file can be prevented by using
 * <code>stamper.setRotateContents(false)</code>, see below.
 * </p>
 */
public static void cleanUpContent(PdfReader reader,String targetPDFFile, float upperY, float lowerY, boolean highLightColor) throws Exception
{
    OutputStream outputStream = new FileOutputStream(targetPDFFile);
    PdfStamper stamper = new PdfStamper(reader, outputStream);
    //stamper.setRotateContents(false);
    List<PdfCleanUpLocation> cleanUpLocations = new ArrayList<PdfCleanUpLocation>();

    for (int i = 1; i <= reader.getNumberOfPages(); i++)
    {
        Rectangle pageRect = reader.getCropBox(i);  
        Rectangle headerRect= new Rectangle(pageRect);
        headerRect.setBottom(headerRect.getTop()-upperY);               
        Rectangle footerRect= new Rectangle(pageRect);
        footerRect.setTop(footerRect.getBottom()+lowerY);   

        if(highLightColor)
        {
            cleanUpLocations.add(new PdfCleanUpLocation(i, headerRect,BaseColor.GREEN));
            cleanUpLocations.add(new PdfCleanUpLocation(i, footerRect,BaseColor.GREEN));
        }
        else
        {
            cleanUpLocations.add(new PdfCleanUpLocation(i, headerRect));
            cleanUpLocations.add(new PdfCleanUpLocation(i, footerRect));
        }
    }   
    PdfCleanUpProcessor cleaner = new PdfCleanUpProcessor(cleanUpLocations, stamper);
    try
    {
        cleaner.cleanUp();
    }
    catch(Exception e)
    {
         e.printStackTrace();
    }

    stamper.close();
    reader.close();
    outputStream.flush();
    outputStream.close();
}