Spire.PDF for Java 10.1.3 ではテキストを置換する機能を実現するための PdfTextReplacer インターフェースが追加されました

PdfDocument pdf = new PdfDocument();
pdf.loadFromFile("sample.pdf");
PdfPageBase page = pdf.getPages().get(0);
PdfTextReplacer replacer = new PdfTextReplacer(page);
PdfTextReplaceOptions options= new PdfTextReplaceOptions();
options.setReplaceType(EnumSet.of(ReplaceActionType.WholeWord));
replacer.replaceText("www.google.com", "1234567");
pdf.saveToFile(outputFile);

PdfImageHelper imageHelper = new PdfImageHelper();
PdfImageInfo[] imageInfoCollection= imageHelper.getImagesInfo(page);
Delete image: 
imageHelper.deleteImage(imageInfoCollection[0]);
Extract image:
    int index = 0;
    for (com.spire.pdf.utilities.PdfImageInfo img : imageInfoCollection) {
        BufferedImage image = img.getImage();
        File output = new File(outputFile_Img + String.format("img_%d.png", index));
        ImageIO.write(image, "PNG", output);
        index++;
    }

PdfImage image = PdfImage.fromFile("ImgFiles/E-iceblue logo.png");
imageHelper.replaceImage(imageInfoCollection[i], image);
Compress image:
for (PdfPageBase page : (Iterable)doc.getPages())
        {
            if (page != null)
            {
                if (imageHelper.getImagesInfo(page) != null)
                {
                    for (com.spire.pdf.utilities.PdfImageInfo info : imageHelper.getImagesInfo(page))
                    {
                        info.tryCompressImage();
                    }
                }
            }
        }