Java itext:修改PDF并设置此背景色:#2E506F

我认为你写完后需要关闭文件。 添加此 pdfDoc.close();

public class ModifyPDFWithBackgroundColor {

public static void main(String[] args) throws IOException {

    String inputPdfFilePath = "/Users/nunyet/IdeaProjects/mystic-river-api/docs/style-guide/LogoFiles/ForPrint/pdf/color-logo-with-background.pdf";
    String outputPdfFilePath =  "/Users/nunyet/IdeaProjects/mystic-river-api/docs/style-guide/LogoFiles/ForPrint/pdf/color-logo-with-background2.pdf";
    DeviceRgb backgroundColor = new DeviceRgb(46, 80, 111);  // Convert HEX to RGB

    // Open the input PDF document
    PdfDocument pdfDoc = new PdfDocument(new PdfReader(inputPdfFilePath), new PdfWriter(outputPdfFilePath));

    // Access the first page of the PDF document
    PdfPage page = pdfDoc.getFirstPage();

    // Create a new page with the same dimensions as the original page
    PdfPage newPage = pdfDoc.addNewPage(page.getPageSize());

    // Create a PdfCanvas for the new page
    PdfCanvas canvas = new PdfCanvas(newPage);

    // Set the background color
    canvas.saveState();
    canvas.setFillColor(backgroundColor);
    canvas.rectangle(0, 0, newPage.getPageSize().getWidth(), newPage.getPageSize().getHeight());
    canvas.fill();
    canvas.restoreState();

    // Close the PDF document
    pdfDoc.close();

    System.out.println("PDF modified successfully!");
}

}