如何使用 Java 為 PDF 添加核取方塊 – 使用 GroupDocs 的互動核取方塊

<repositories>
    <repository>
        <id>repository.groupdocs.com</id>
        <name>GroupDocs Repository</name>
        <url>https://releases.groupdocs.com/annotation/java/</url>
    </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>com.groupdocs</groupId>
        <artifactId>groupdocs-annotation</artifactId>
        <version>25.2</version>
    </dependency>
</dependencies>

import com.groupdocs.annotation.Annotator;

public class InitializeAnnotator {
    public static void run() {
        try (final Annotator annotator = new Annotator("YOUR_DOCUMENT_DIRECTORY/input.pdf")) {
            // The Annotator is ready for use.
        }
    }
}

import com.groupdocs.annotation.models.Rectangle;
import com.groupdocs.annotation.models.formatspecificcomponents.pdf.CheckBoxComponent;
import com.groupdocs.annotation.models.BoxStyle;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class CreateCheckBoxComponent {
    public static void run() {
        // Initialize a new CheckBoxComponent.
        CheckBoxComponent checkbox = new CheckBoxComponent();

        // Set the checkbox as checked.
        checkbox.setChecked(true);

        // Define the position and size of the checkbox using a Rectangle.
        checkbox.setBox(new Rectangle(100, 100, 100, 100));

        // Set the pen color for drawing the checkbox (65535 represents yellow).
        checkbox.setPenColor(65535);

        // Apply a star style to the checkbox border.
        checkbox.setStyle(BoxStyle.STAR);

        // Create replies associated with this checkbox and add them to it.
        Reply reply1 = new Reply();
        reply1.setComment("First comment");
        reply1.setRepliedOn(new Date());

        Reply reply2 = new Reply();
        reply2.setComment("Second comment");
        reply2.setRepliedOn(new Date());

        List<Reply> replies = new ArrayList<>();
        replies.add(reply1);
        replies.add(reply2);

        // Assign the list of replies to the checkbox component.
        checkbox.setReplies(replies);
    }
}

import com.groupdocs.annotation.Annotator;
import com.groupdocs.annotation.models.formatspecificcomponents.pdf.CheckBoxComponent;

public class AddCheckBoxAndSave {
    public static void run() {
        try (final Annotator annotator = new Annotator("YOUR_DOCUMENT_DIRECTORY/input.pdf")) {
            // Assume checkbox is created and configured as per the previous feature.
            CheckBoxComponent checkbox = CreateCheckBoxComponent.createCheckbox();

            // Add the configured checkbox component to the document using the annotator instance.
            annotator.add(checkbox);

            // Save the annotated PDF to an output directory with a specific filename.
            annotator.save("YOUR_OUTPUT_DIRECTORY/result_checkbox_component.pdf");
        }
    }
}

File inputFile = new File("path/to/your/file.pdf");
if (!inputFile.exists()) {
    throw new FileNotFoundException("PDF file not found: " + inputFile.getAbsolutePath());
}

java -Xmx2048m YourApplication

License license = new License();
license.setLicense("path/to/GroupDocs.Annotation.Java.lic");

public void processPDFBatch(List<String> pdfPaths) {
    for (String path : pdfPaths) {
        try (Annotator annotator = new Annotator(path)) {
            // Process individual document
            addCheckboxes(annotator);
            annotator.save(getOutputPath(path));
        }
        // Memory is automatically released after each document
    }
}

checkbox.setPenWidth(2);              // Border thickness
checkbox.setBackgroundColor(16777215); // White background
checkbox.setOpacity(0.8);             // Semi‑transparent

if (documentContainsSection("Terms and Conditions")) {
    addTermsAcceptanceCheckbox(annotator);
}

Rectangle dynamicPosition = calculateOptimalPosition(document, contentType);
checkbox.setBox(dynamicPosition);