向 PDF 添加页眉

向 PDF 添加页眉

当需要在每页上重复页眉内容时，使用 PdfFileStamp。

步骤

1. 创建一个 PdfFileStamp 实例并绑定源 PDF。
2. 构建页眉内容为 FormattedText 或从图像流加载它。
3. 调用适当的 addHeader 过载。
4. 保存输出并关闭 Facades 对象。

Java 示例

public static void addTextHeader(Path inputFile, Path outputFile) {
    PdfFileStamp pdfStamper = new PdfFileStamp();
    try {
        pdfStamper.bindPdf(inputFile.toString());
        FormattedText text = new FormattedText("Sample Header");
        pdfStamper.addHeader(text, 20);
        pdfStamper.save(outputFile.toString());
    } finally {
        pdfStamper.close();
    }
}

public static void addImageHeader(Path inputFile, Path imageFile, Path outputFile) throws Exception {
    PdfFileStamp pdfStamper = new PdfFileStamp();
    try (InputStream imageStream = Files.newInputStream(imageFile)) {
        pdfStamper.bindPdf(inputFile.toString());
        pdfStamper.addHeader(imageStream, 20);
        pdfStamper.save(outputFile.toString());
    } finally {
        pdfStamper.close();
    }
}

public static void addHeaderWithMargins(Path inputFile, Path outputFile) {
    PdfFileStamp pdfStamper = new PdfFileStamp();
    try {
        pdfStamper.bindPdf(inputFile.toString());
        FormattedText text = new FormattedText(
                "Sample Header",
                Color.BLUE,
                FontStyle.Helvetica,
                EncodingType.Winansi,
                true,
                12.0f);
        pdfStamper.addHeader(text, 20, 20, 20);
        pdfStamper.save(outputFile.toString());
    } finally {
        pdfStamper.close();
    }
}