使用PDFBox渲染具有填充表单字段的文档适用于1.8.2，但不适用于2.0.2 [英] Rendering a document with filled form fields using PDFBox works with 1.8.2, but not 2.0.2

问题描述

我的目标是打开PDF文档，填写一些表单字段，然后将其渲染为图像。我正在使用PDFBox与Java来做到这一点。我开始使用2.0.2版本（最新版本）并填写表单字段。当我保存并用PDF阅读器打开它时，表单字段具有值。但是当我将它渲染到图像中时，表单域具有黑色边框并且没有文本。然后我用1.8.12试了同样的东西，它工作。然而，我真的很想使用2.x中的新功能。

• PDF只有AcroForms，没有XFA（或者至少我想是这样）。当我打电话给PDAcroForm.getXFA（）时，它返回null。
  
• 使用2.0.2，如果我使用setValue来渲染某些东西，那么渲染看起来很糟糕。但是，使用Adobe Reader填充某些内容是可行的。这两种情况都使用1.8。


• 使用2.0.2我尝试了PDAcroForm.refreshAppearances（）和/或PDAcroForm.setNeedAppearances（true）的任意组合。这些方法在1.8中不存在。

我使用1.8.12代码进行渲染：

  public class Main {
 public static void main（String [] args）throws Exception {
 PDDocument doc = PDDocument.loadNonSeq（new File（test.pdf），null）; 
 doc.setAllSecurityToBeRemoved（true）; 
 PDDocumentCatalog cat = doc.getDocumentCatalog（）; 
 PDAcroForm form = cat.getAcroForm（）; 
 for（Object _field：form.getFields（））{
 PDField field =（PDField）_field; 
 System.out.println（field.getFullyQualifiedName（））; 
 field.setValue（field.getFullyQualifiedName（））; 
} 
 
列表< PDPage> pdPages = doc.getDocumentCatalog（）。getAllPages（）; 
 int page = 0; 
 for（PDPage pdPage：pdPages）{
 ++ page; 
 BufferedImage bim = pdPage.convertToImage（BufferedImage.TYPE_INT_RGB，96）; 
 ImageIOUtil.writeImage（bim，rendered+ - + page +.png，96）; 
} 
 doc.close（）; 
} 
} 
  

我使用2.0来渲染的代码。 2：

  public class Main {
 public static void main（String [] args）throws Exception {
 PDDocument doc = PDDocument.load（new File（test.pdf））; 
 doc.setAllSecurityToBeRemoved（true）; 
 PDDocumentCatalog cat = doc.getDocumentCatalog（）; 
 PDAcroForm form = cat.getAcroForm（）; 
 for（PDField field：form.getFields（））{
 System.out.println（field.getFullyQualifiedName（））; 
 if（field instanceof PDTextField）{
 field.setValue（field.getFullyQualifiedName（））; 
} 
} 
 //不带或不带
 form.setNeedAppearances（true）; 
 form.refreshAppearances（）; 
 
 PDDocument renderDoc = doc; 
 PDFRenderer pdfRenderer = new PDFRenderer（renderDoc）; 
 for（int page = 0; page< renderDoc.getNumberOfPages（）; ++ page）{
 BufferedImage bim = pdfRenderer.renderImageWithDPI（page，96，ImageType.RGB）; 
 ImageIOUtil.writeImage（bim，rendered+ - +（page + 1）+.png，96）; 
 
 
 
 
 
 
使用1.8渲染的正确版本。 12： 
 
 
 
使用2.0.2呈现的错误版本： 
解决方案
这是PDFBox 2.0.2中的一个错误。它已在2.0.4中解决，所以解决方案是将版本升级到最新版本。
 
My goal is to open a PDF document, fill in some form fields and then render it to an image. I'm using PDFBox with Java to do it. I started using version 2.0.2 (latest) and filling the form fields works. When I save it and then open it with a PDF reader, the form fields have values. But when I render it to an image, the form fields have black borders and no text inside. I then tried the same thing with 1.8.12 and it works. However, I would really like to use the new features in 2.x.


The PDF only has AcroForms, no XFA (or at least I think so). When I call PDAcroForm.getXFA() it returns null.
Using 2.0.2, if I'm rendering something filled using setValue, then the rendering looks broken. However, rendering something filled using Adobe Reader works. Both cases work using 1.8.
With 2.0.2 I tried any combination of PDAcroForm.refreshAppearances() and/or PDAcroForm.setNeedAppearances(true). Those methods are absent in 1.8.


The code I'm using to render using 1.8.12:
public class Main {
    public static void main(String[] args) throws Exception {
        PDDocument doc = PDDocument.loadNonSeq(new File("test.pdf"), null);
        doc.setAllSecurityToBeRemoved(true);
        PDDocumentCatalog cat = doc.getDocumentCatalog();
        PDAcroForm form = cat.getAcroForm();
        for (Object _field : form.getFields()) {
            PDField field = (PDField) _field;
            System.out.println(field.getFullyQualifiedName());
            field.setValue(field.getFullyQualifiedName());
        }

        List<PDPage> pdPages = doc.getDocumentCatalog().getAllPages();
        int page = 0;
        for (PDPage pdPage : pdPages) {
            ++page;
            BufferedImage bim = pdPage.convertToImage(BufferedImage.TYPE_INT_RGB, 96);
            ImageIOUtil.writeImage(bim, "rendered" + "-" + page + ".png", 96);
        }
        doc.close();
    }
}
The code I'm using to render using 2.0.2:
public class Main {
    public static void main(String[] args) throws Exception {
        PDDocument doc = PDDocument.load(new File("test.pdf"));
        doc.setAllSecurityToBeRemoved(true);
        PDDocumentCatalog cat = doc.getDocumentCatalog();
        PDAcroForm form = cat.getAcroForm();
        for (PDField field : form.getFields()) {
            System.out.println(field.getFullyQualifiedName());
            if (field instanceof PDTextField) {
                field.setValue(field.getFullyQualifiedName());
            }
        }
        // Doesn't work with or without these
        form.setNeedAppearances(true);
        form.refreshAppearances();

        PDDocument renderDoc = doc;
        PDFRenderer pdfRenderer = new PDFRenderer(renderDoc);
        for (int page = 0; page < renderDoc.getNumberOfPages(); ++page) {
            BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 96,     ImageType.RGB);
            ImageIOUtil.writeImage(bim, "rendered" + "-" + (page + 1) +     ".png", 96);
        }
    }
}
Correct version rendered using 1.8.12: 

Bad version rendered using 2.0.2: 
解决方案
This was a bug in PDFBox 2.0.2. It is resolved in 2.0.4, so the solution is to upgrade the version to the latest.

                        
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