使用iTextpdf为pdf添加pdf信息

资料来源：

http://itextpdf.com/examples/iia.php?id=216

 

1.新文档添加pdf信息

        // step 1
        Document document = new Document();
        // step 2
        PdfWriter.getInstance(document, new FileOutputStream(filename));
        // step 3
        document.addTitle("Hello World example");
        document.addAuthor("Bruno Lowagie");
        document.addSubject("This example shows how to add metadata");
        document.addKeywords("Metadata, iText, PDF");
        document.addCreator("My program using iText");
        document.open();
        // step 4
        document.add(new Paragraph("Hello World"));
        // step 5
        document.close();

 

2.对已存在的pdf添加信息

这种方法适用于加水印的情况。

PdfReader reader = new PdfReader(src);
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
        Map<String, String> info = reader.getInfo();
        info.put("Title", "Hello World stamped");
        info.put("Subject", "Hello World with changed metadata");
        info.put("Keywords", "iText in Action, PdfStamper");
        info.put("Creator", "Silly standalone example");
        info.put("Author", "Also Bruno Lowagie");
        stamper.setMoreInfo(info);
        stamper.close();
        reader.close();