如何在 Java 中使用 GroupDocs.Watermark 為 PDF 加上浮水印

<repositories>
   <repository>
      <id>repository.groupdocs.com</id>
      <name>GroupDocs Repository</name>
      <url>https://releases.groupdocs.com/watermark/java/</url>
   </repository>
</repositories>

<dependencies>
   <dependency>
      <groupId>com.groupdocs</groupId>
      <artifactId>groupdocs-watermark</artifactId>
      <version>24.11</version>
   </dependency>
</dependencies>

import com.groupdocs.watermark.Watermarker;

public class Main {
    public static void main(String[] args) throws Exception {
        Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf");
        // Additional operations can be performed here.
        watermarker.close();
    }
}

import com.groupdocs.watermark.Watermarker;
import com.groupdocs.watermark.options.PdfLoadOptions;

public class LoadPdfDocument {
    public static void run() throws Exception {
        PdfLoadOptions loadOptions = new PdfLoadOptions();
        Watermarker watermarker = new Watermarker("YOUR_DOCUMENT_DIRECTORY/document.pdf", loadOptions);
    }
}

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import com.groupdocs.watermark.Watermarker;
import com.groupdocs.watermark.contents.PdfArtifact;
import com.groupdocs.watermark.contents.PdfContent;
import com.groupdocs.watermark.contents.PdfWatermarkableImage;

public class ReplaceImageInArtifact {
    public static void run(Watermarker watermarker) throws Exception {
        PdfContent pdfContent = watermarker.getContent(PdfContent.class);

        File imageFile = new File("YOUR_DOCUMENT_DIRECTORY/test_image.png");
        byte[] imageBytes = new byte[(int) imageFile.length()];
        InputStream imageStream = new FileInputStream(imageFile);
        imageStream.read(imageBytes);
        imageStream.close();

        for (PdfArtifact artifact : pdfContent.getPages().get_Item(0).getArtifacts()) {
            if (artifact.getImage() != null) {
                artifact.setImage(new PdfWatermarkableImage(imageBytes));
            }
        }
    }
}

import com.groupdocs.watermark.Watermarker;

public class SaveAndCloseDocument {
    public static void run(Watermarker watermarker) throws Exception {
        watermarker.save("YOUR_OUTPUT_DIRECTORY/output_document.pdf");
        watermarker.close();
    }
}