在将pdf文件复制到另一个文件时添加注释 [英] adding annotations while copying a pdf file to another

问题描述

我正在尝试将注释添加到要复制到新pdf的每个页面中，但无法做到这一点...

I am trying to add annotations to every Page which gets copied to my new pdf but not able to do that...

这是我的代码.

import com.lowagie.text.Document;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.*;

import java.awt.*;
import java.io.FileOutputStream;


public class Annotations {

    public static void main(String[] args) {

        try {

            PdfReader reader = new PdfReader("string-to-pdf.pdf");
            Document document = new Document(reader.getPageSizeWithRotation(1));
            PdfCopy copy = new PdfCopy(document,
                    new FileOutputStream("temp.pdf"));
            copy.setPdfVersion(PdfWriter.VERSION_1_5);
            document.open();
            for(int i = 1; i <=reader.getNumberOfPages();i++){
                copy.addPage(copy.getImportedPage(reader,i));
                copy.addAnnotation(PdfAnnotation.createLink(copy, new Rectangle(200f, 700f, 30455454f, 800f), PdfAnnotation.HIGHLIGHT_TOGGLE, PdfAction.javaScript("app.alert('Hello');\r", copy)));
            }

            document.newPage();
            // page 3
            PdfContentByte pcb = new PdfContentByte(copy);
            pcb.setColorFill(new Color(0xFF, 0x00, 0x00));

            document.close();

        } catch (Exception de) {
            de.printStackTrace();
        }
    }
}

正在复制文件，但看不到新文件中的注释.

the files are getting copied but can't see the annotations in the new file.

推荐答案

PdfCopy用于忠实的页面复制，而不是用于创建；因此，从PdfWriter继承的修改例程将被禁用，例如

PdfCopy is for faithful page copying, not for creation; thus, modification routines inherited from PdfWriter are disabled, e.g.

@Override
public void addAnnotation(PdfAnnotation annot) {  }

可以通过页面图章进行专用操作，请参见. createPageStamp.该方法的JavaDocs包含一些示例用法代码，其中包括一个注释:

Dedicated manipulations are possible, though, by means of page stamps, cf. createPageStamp. The JavaDocs of that method contain some example usage code including an addition of an annotation:

PdfImportedPage page = copy.getImportedPage(reader, 1);
PdfCopy.PageStamp ps = copy.createPageStamp(page);
ps.addAnnotation(PdfAnnotation.createText(copy, new Rectangle(50, 180, 70, 200), "Hello", "No Thanks", true, "Comment"));
PdfContentByte under = ps.getUnderContent();
under.addImage(img);
PdfContentByte over = ps.getOverContent();
over.beginText();
over.setFontAndSize(bf, 18);
over.setTextMatrix(30, 30);
over.showText("total page " + totalPage);
over.endText();
ps.alterContents();
copy.addPage(page);

但是请注意，像这样应用PageStamp实际上会操纵原始的PdfReader.因此，此后，请勿继续使用PdfReader实例，前提是其内容为原始内容，尤其是带有页码的复制页面很脏.

Beware, though, applying a PageStamp like this actually manipulates the original PdfReader. Afterwards, therefore, don't continue using the PdfReader instance assuming its contents are the original contents, in particular the pagestamped copied pages are dirty.

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