如何使用PDFBox 2.0创建单选按钮组

我想使用PDFBox 2.0创建一个单选按钮组，我能够创建3个单选按钮，但我无法弄清楚如何对它们进行分组（PDFBox 1.8，使用了PDRadioCollection ，但2.0没有。）。

如何使用PDFBox 2.0创建单选按钮组？

这是我目前的代码：

PDDocument document = new PDDocument(); PDPage page = new PDPage(PDRectangle.A4); document.addPage(page); PDAcroForm acroForm = new PDAcroForm(document); acroForm.setNeedAppearances(true); document.getDocumentCatalog().setAcroForm(acroForm); PDResources res = new PDResources(); COSName fontName = res.add(PDTrueTypeFont.load(document, new FileInputStream("C:/Windows/Fonts/arial.ttf"), StandardEncoding.INSTANCE)); acroForm.setDefaultResources(res); acroForm.setDefaultAppearance('/' + fontName.getName() + " 10 Tf 0 g"); PDPageContentStream contents = new PDPageContentStream(document, page); List options = Arrays.asList("a", "b", "c"); for (int i = 0; i < options.size(); i++) { PDRadioButton button = new PDRadioButton(acroForm); button.setPartialName("RadioButton" + options.get(i)); PDAppearanceCharacteristicsDictionary fieldAppearance = new PDAppearanceCharacteristicsDictionary(new COSDictionary()); fieldAppearance.setBorderColour(new PDColor(new float[]{0, 0, 0}, PDDeviceRGB.INSTANCE)); PDAnnotationWidget widget = button.getWidgets().get(0); widget.setRectangle(new PDRectangle(30, 800 - i * (21), 16, 16)); widget.setAppearanceCharacteristics(fieldAppearance); acroForm.getFields().add(button); page.getAnnotations().add(widget); } contents.close(); document.save(new FileOutputStream("RadioButtonTest.pdf")); document.close(); 

Answer 1

通过查看Tilman的建议和一般的侥幸，我能够想出一个创建单选按钮组的解决方案。

注意：我一直在检查Acrobat 11中的pdfvalidation我的结果。

这是代码：

 try { PDDocument document = new PDDocument(); PDPage page = new PDPage(PDRectangle.A4); document.addPage(page); PDAcroForm acroForm = new PDAcroForm(document); acroForm.setNeedAppearances(true); acroForm.setXFA(null); document.getDocumentCatalog().setAcroForm(acroForm); PDFont font = PDType1Font.HELVETICA; PDResources res = new PDResources(); COSName fontName = res.add(font); acroForm.setDefaultResources(res); acroForm.setDefaultAppearance('/' + fontName.getName() + " 10 Tf 0 g"); PDPageContentStream contents = new PDPageContentStream(document, page); List options = Arrays.asList("a", "b", "c"); PDRadioButton radioButton = new PDRadioButton(acroForm); radioButton.setPartialName("RadioButtonParent"); radioButton.setExportValues(options); radioButton.getCOSObject().setName(COSName.DV, options.get(1)); List widgets = new ArrayList<>(); for (int i = 0; i < options.size(); i++) { PDAppearanceCharacteristicsDictionary fieldAppearance = new PDAppearanceCharacteristicsDictionary(new COSDictionary()); fieldAppearance.setBorderColour(new PDColor(new float[]{0, 0, 0}, PDDeviceRGB.INSTANCE)); PDAnnotationWidget widget = new PDAnnotationWidget(); widget.setRectangle(new PDRectangle(30, 811 - i * (21), 16, 16)); widget.setAppearanceCharacteristics(fieldAppearance); widgets.add(widget); page.getAnnotations().add(widget); // added by Tilman on 13.1.2017, without it Adobe does not set the values properly PDAppearanceDictionary appearance = new PDAppearanceDictionary(); COSDictionary dict = new COSDictionary(); dict.setItem(COSName.getPDFName("Off"), new COSDictionary()); dict.setItem(COSName.getPDFName(options.get(i)), new COSDictionary()); PDAppearanceEntry appearanceEntry = new PDAppearanceEntry(dict); appearance.setNormalAppearance(appearanceEntry); widget.setAppearance(appearance); contents.beginText(); contents.setFont(font, 10); contents.newLineAtOffset(56, 811 - i * (21) + 4); contents.showText(options.get(i)); contents.endText(); } radioButton.setWidgets(widgets); acroForm.getFields().add(radioButton); contents.close(); try(FileOutputStream output = new FileOutputStream("Test.pdf")) { document.save(output); } document.close(); } catch (IOException e) { e.printStackTrace(); } 

关键似乎是将每个单选按钮的部分名称设置为相同的值，但我不能肯定地说。