问题描述
在我们的项目中，我们使用iText 5.x版本来操纵PDF文件，并努力将其实现与PDFBox 2.x版本一起迁移。
在pdf页面方案中有一个添加图像，我已经尽我所能将代码转换为PDFBox。 :)在现有的实现（iText）中，他们使用PdfTemplate在模板中添加图像，并使用PdfAnnotation类在注释中添加模板。
我不知道如何使用PDFBox做到这一点。另外，请检查我是否正确迁移了现有的实现，因为我是使用Java在PDF库中的新手。
将图像添加到PDF（使用iText）：
Document document = null;
PdfReader pdfReader = null;
pdfReader = new PdfReader(SourceFilePath());
//we retrieve the total number of pages and the page size
int total = pdfReader.getNumberOfPages();
Rectangle rectangle = pdfReader.getPageSizeWithRotation(1);
document = new Document(rectangle);
PdfImportedPage page;
Pdfcopy.PageStamp stamp;
// step 2: we create a Pdfcopy object that listens to the document.
Pdfcopy copy = new Pdfcopy(document,new FileOutputStream(DestinationFilePath(false));
document.open();
// step 4: adding the content
for (int i = 1; i <= total; i++) {
page = copy.getImportedPage(pdfReader,i);
if(i == 1 || aBarcodeVO.getdisplacementVO().isApplyForAllPages()){
BufferedImage bufferedImage = getimage();
Image img = Image.getInstance(bufferedImage,null);
img.scaletoFit(qrImageSize,qrImageSize);
PdfName imgKey = new PdfName(aBarcodeVO.getImgUniqueId() + i);
Rectangle rectPage = pdfReader.getPageSizeWithRotation(i);
stamp = copy.createPageStamp(page);
PdfImage stream = new PdfImage(img,"",null);
stream.put(imgKey,imgKey);
PdfIndirectObject ref = copy.addToBody(stream);
int rotation = pdfReader.getPageRotation(i);
Rectangle cropBoxRect = pdfReader.getCropBox(i);;
//Explicitly Apply rotation to crop Box rectangle.
for (int j = 0; j < (rotation/90); j++) {
cropBoxRect = cropBoxRect.rotate();
}
//added Image in template and template in Annotation and finally annotation is added in PDF through Pdfcopy.PageStamp
PdfTemplate template = PdfTemplate.createTemplate(copy,img.getPlainWidth(),img.getPlainHeight());
img.setAbsolutePosition(0,0);
img.setRotationdegrees(rotation);
img.setDirectReference(ref.getIndirectReference());
template.addImage(img);
Rectangle rect = new Rectangle(rectLlx,rectLly,rectUrx,rectUry);
rect.setBorderWidth(0.5f);
rect.setBorderColor(new BaseColor(0xFF,0x00,0x00));
PdfAnnotation annotation = PdfAnnotation.createStamp(copy,rect,null,"AnnotationOnly");
annotation.setAppearance(PdfAnnotation.APPEaraNCE_norMAL,template);
annotation.setFlags(PdfAnnotation.FLAGS_PRINT + PdfAnnotation.FLAGS_LOCKED);
annotation.setRotate(rotation);
PdfName annotKey = getAnnotKey(i);
annotation.put(annotKey,annotKey);
stamp.addAnnotation(annotation);
stamp.alterContents();
}
copy.addPage(page);
}
copy.freeReader(pdfReader);
try {
if (document != null) {
document.close();
}
} catch (Exception e) {
System.out.println("Exception in handleAddBarCode() while closing():document:" + e);
}
try {
if (pdfReader != null) {
pdfReader.close();
}
} catch (Exception e) {
System.out.println("Exception in handleAddBarCode() while closing():pdfReader:" + e);
}
PDDocument pdDocument = PDDocument.load(new File(SourceFilePath()));
int total = pdDocument.getNumberOfPages();
PDPage page = pdDocument.getDocumentCatalog().getPages().get(0);
PDRectangle rectangle = getRotatedMediaBox(page);
PDPage pdPage = new PDPage(rectangle);
PDDocument newDocument = new PDDocument();
for (int i = 0; i < total; i++) {
pdPage = newDocument.importPage(pdDocument.getPage(i));
PDRectangle pageRect = getRotatedMediaBox(pdPage);
int rotation = pdPage.getRotation();
PDRectangle cropBoxRect = page.getCropBox();
//Calculate margin between crop Box rectangle and page rectangle.
float[] margins = getCropBoxMargin(pageRect,cropBoxRect,rotation);
if (rotation == 90 || rotation == 270) {
cropBoxRect = new PDRectangle(cropBoxRect.getLowerLeftY(),cropBoxRect.getLowerLeftX(),cropBoxRect.getHeight(),cropBoxRect.getWidth());
}
BufferedImage bufferedImage = getimage();
PDPageContentStream pageContentStream = new PDPageContentStream(newDocument,pdPage,PDPageContentStream.AppendMode.APPEND,true);
PDImageXObject image = JPEGFactory.createFromImage(newDocument,bufferedImage);
if (rotation == 90 || rotation == 270) {
Matrix matrix = Matrix.getRotateInstance(Math.toradians(rotation),0);
PDRectangle cropBox = pdPage.getCropBox();
float tx = (cropBox.getLowerLeftX() + cropBox.getUpperRightX()) / 2;
float ty = (cropBox.getLowerLeftY() + cropBox.getUpperRightY()) / 2;
Rectangle rectang = cropBox.transform(matrix).getBounds();
float scale = Math.min(cropBox.getWidth() / (float)rectang.getWidth(),cropBox.getHeight() / (float)rectang.getHeight());
pageContentStream.transform(Matrix.getTranslateInstance(tx,ty));
pageContentStream.transform(matrix);
pageContentStream.transform(Matrix.getScaleInstance(scale,scale));
pageContentStream.transform(Matrix.getTranslateInstance(-tx,-ty));
}
pageContentStream.drawImage(image,rectLlx,qrImageSize,qrImageSize);
pageContentStream.close();
}
newDocument.save(new File(DestinationFilePath(false)));
newDocument.close();
pdDocument.close();
请为此提供帮助，或者至少期待您对纠正PDFBox实现的代码提出建议。
解决方法
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