向 PDF 添加页码

向 PDF 添加页码

当必须在 PDF 内容已经创建后才应用页码时，使用 PdfFileStamp。

步骤

1. 创建一个 PdfFileStamp 实例并绑定源 PDF。
2. 选择所需的页码放置策略。
3. 可选地在添加页码之前设置编号样式和起始编号。
4. 调用 addPageNumber 使用所需的重载。
5. 保存输出并关闭 Facades 对象。

Java 示例

public static void addPageNumbersDefault(Path inputFile, Path outputFile) {
    PdfFileStamp pdfStamper = new PdfFileStamp();
    try {
        pdfStamper.bindPdf(inputFile.toString());
        pdfStamper.addPageNumber("Page #");
        pdfStamper.save(outputFile.toString());
    } finally {
        pdfStamper.close();
    }
}

public static void addPageNumbersAtCoordinates(Path inputFile, Path outputFile) {
    PdfFileStamp pdfStamper = new PdfFileStamp();
    try {
        pdfStamper.bindPdf(inputFile.toString());
        pdfStamper.addPageNumber("Page #", 300, 20);
        pdfStamper.save(outputFile.toString());
    } finally {
        pdfStamper.close();
    }
}

public static void addPageNumbersWithPositionAndMargins(Path inputFile, Path outputFile) {
    PdfFileStamp pdfStamper = new PdfFileStamp();
    try {
        pdfStamper.bindPdf(inputFile.toString());
        pdfStamper.addPageNumber("Page #", PdfFileStamp.POS_BOTTOM_RIGHT, 10, 10, 10, 10);
        pdfStamper.save(outputFile.toString());
    } finally {
        pdfStamper.close();
    }
}

public static void addPageNumbersWithRomanStyle(Path inputFile, Path outputFile) {
    PdfFileStamp pdfStamper = new PdfFileStamp();
    try {
        pdfStamper.bindPdf(inputFile.toString());
        pdfStamper.setNumberingStyle(NumberingStyle.NumeralsRomanUppercase);
        pdfStamper.setStartingNumber(42);
        pdfStamper.addPageNumber("Page #", PdfFileStamp.POS_UPPER_RIGHT);
        pdfStamper.save(outputFile.toString());
    } finally {
        pdfStamper.close();
    }
}