In this example we will Apache PDFBox to create PDF form.
The form will contain the following elements
- Labels
- Input Text Fields
- Check Boxes
- Radio Buttons
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PDDocument document = new PDDocument(); PDPage page = new PDPage(PDRectangle.LETTER); document.addPage(page); // Adobe Acrobat uses Helvetica as a default font and // stores that under the name '/Helv' in the resources dictionary PDFont font = PDType1Font.HELVETICA; PDResources resources = new PDResources(); resources.put(COSName.getPDFName( "Helv" ), font); // Add a new AcroForm and add that to the document PDAcroForm acroForm = new PDAcroForm(document); document.getDocumentCatalog().setAcroForm(acroForm); // Add and set the resources and default appearance at the form level acroForm.setDefaultResources(resources); // Acrobat sets the font size on the form level to be // auto sized as default. This is done by setting the font size to '0' String defaultAppearanceString = "/Helv 12 Tf 0 g" ; acroForm.setDefaultAppearance(defaultAppearanceString); int x = 25 ; int y = 750 ; addText(document, page, "Registration Form" , x , y, true ); y = y - 30 ; addText(document, page, "Name" , x , y, false ); addField(acroForm, page, "name" , "Your Name" , x + 75 , y); y = y - 20 ; addText(document, page, "Address" , x , y, false ); addField(acroForm, page, "address" , "" , x + 75 , y); y = y - 20 ; addText(document, page, "Phone No" , x , y, false ); addField(acroForm, page, "phone" , " " , x + 75 , y); y = y - 30 ; addText(document, page, "Hobbies" , x , y, true ); y = y - 20 ; addCheckBox(document, acroForm, page, "sports" , false , x, y); addText(document, page, "Sports" , x + 25 , y, false ); y = y - 20 ; addCheckBox(document, acroForm, page, "cooking" , false , x, y); addText(document, page, "Cooking" , x + 25 , y, false ); y = y - 20 ; addCheckBox(document, acroForm, page, "music" , true , x, y); addText(document, page, "Music" , x + 25 , y, false ); y = y - 20 ; addCheckBox(document, acroForm, page, "travel" , false , x, y); addText(document, page, "Travelling" , x + 25 , y, false ); y = y - 30 ; addText(document, page, "Gender" , x , y, true ); ArrayList<button> genderList = new ArrayList</button><button>(); Button button = new Button(); button.setName( "Male" ); button.setValue( "male" ); genderList.add(button); button = new Button(); button.setName( "Female" ); button.setValue( "female" ); genderList.add(button); button = new Button(); button.setName( "Other" ); button.setValue( "other" ); genderList.add(button); addRadioButtons(document, acroForm, page, genderList, "male" , x, y); document.save( "docs/my_form.pdf" ); document.close(); } // Generate Form Labels private static void addText(PDDocument document, PDPage page, String myText, float x, float y, boolean bold) { try { //Get Content Stream for Writing Data PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true ); //Begin the Content stream contentStream.beginText(); //Setting the font to the Content stream if (bold){ contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12 ); } else { contentStream.setFont(PDType1Font.HELVETICA, 12 ); } //Setting the position for the line contentStream.newLineAtOffset(x, y); //Adding text in the form of string contentStream.showText(myText); //Ending the content stream contentStream.endText(); //Closing the content stream contentStream.close(); } catch (IOException e) { e.printStackTrace(); } } // Generate Form Text fields private static void addField(PDAcroForm acroForm, PDPage page, String name, String defaultValue, float x, float y) { try { // Add a form field to the form. PDTextField textBox = new PDTextField(acroForm); textBox.setPartialName(name); acroForm.getFields().add(textBox); // Specify the widget annotation associated with the field PDAnnotationWidget widget = textBox.getWidgets().get( 0 ); PDRectangle rect = new PDRectangle(x, y, 200 , 15 ); widget.setRectangle(rect); widget.setPage(page); // set black border // if you prefer defaults, just delete this code block PDAppearanceCharacteristicsDictionary fieldAppearance = new PDAppearanceCharacteristicsDictionary( new COSDictionary()); fieldAppearance.setBorderColour( new PDColor( new float []{ 0 , 0 , 0 }, PDDeviceRGB.INSTANCE)); // for background color if you need // fieldAppearance.setBackground(new PDColor(new float[]{1,1,0}, PDDeviceRGB.INSTANCE)); widget.setAppearanceCharacteristics(fieldAppearance); // make sure the widget annotation is visible on screen and paper widget.setPrinted( true ); // Add the widget annotation to the page page.getAnnotations().add(widget); // set the field value textBox.setValue(defaultValue); } catch (IOException e) { e.printStackTrace(); } } // Generate Form Check Boxes private static void addCheckBox(PDDocument document, PDAcroForm acroForm, PDPage page, String name, boolean checked, float x, float y) { try { PDRectangle rect = new PDRectangle(x, y, 15 , 15 ); PDCheckBox checkbox = new PDCheckBox(acroForm); checkbox.setPartialName(name); PDAnnotationWidget widget = checkbox.getWidgets().get( 0 ); widget.setPage(page); widget.setRectangle(rect); widget.setPrinted( true ); PDAppearanceCharacteristicsDictionary appearanceCharacteristics = new PDAppearanceCharacteristicsDictionary( new COSDictionary()); appearanceCharacteristics.setBorderColour( new PDColor( new float []{ 1 , 0 , 0 }, PDDeviceRGB.INSTANCE)); appearanceCharacteristics.setBackground( new PDColor( new float []{ 1 , 1 , 0 }, PDDeviceRGB.INSTANCE)); // 8 = cross; 4 = checkmark; H = star; u = diamond; n = square, l = dot appearanceCharacteristics.setNormalCaption( "4" ); widget.setAppearanceCharacteristics(appearanceCharacteristics); PDBorderStyleDictionary borderStyleDictionary = new PDBorderStyleDictionary(); borderStyleDictionary.setWidth( 1 ); borderStyleDictionary.setStyle(PDBorderStyleDictionary.STYLE_SOLID); widget.setBorderStyle(borderStyleDictionary); PDAppearanceDictionary ap = new PDAppearanceDictionary(); widget.setAppearance(ap); PDAppearanceEntry normalAppearance = ap.getNormalAppearance(); COSDictionary normalAppearanceDict = (COSDictionary) normalAppearance.getCOSObject(); normalAppearanceDict.setItem(COSName.Off, createCheckBoxAppearanceStream(document, widget, false )); normalAppearanceDict.setItem(COSName.YES, createCheckBoxAppearanceStream(document, widget, true )); // If we ever decide to implement a /D (down) appearance, just // replace the background colors c with c * 0.75 page.getAnnotations().add(checkbox.getWidgets().get( 0 )); acroForm.getFields().add(checkbox); if (checked){ checkbox.check(); } else { checkbox.unCheck(); } } catch (IOException e) { e.printStackTrace(); } } // Generate Form Radio Buttons private static void addRadioButtons(PDDocument document, PDAcroForm acroForm, PDPage page, ArrayList</button><button> buttonList, String defaultValue, float x, float y) { try { ArrayList<string> buttonValues = new ArrayList<string>(); for (Button button: buttonList){ buttonValues.add(button.getValue()); } PDRadioButton radioButton = new PDRadioButton(acroForm); radioButton.setPartialName( "MyRadioButton" ); radioButton.setExportValues(buttonValues); PDAppearanceCharacteristicsDictionary appearanceCharacteristics = new PDAppearanceCharacteristicsDictionary( new COSDictionary()); appearanceCharacteristics.setBorderColour( new PDColor( new float [] { 1 , 0 , 0 }, PDDeviceRGB.INSTANCE)); appearanceCharacteristics.setBackground( new PDColor( new float []{ 0 , 1 , 0 .3f}, PDDeviceRGB.INSTANCE)); ArrayList<pdannotationwidget> widgets = new ArrayList<pdannotationwidget>(); for ( int i = 0 ; i < buttonList.size(); i++) { y = y - 20 ; PDAnnotationWidget widget = new PDAnnotationWidget(); widget.setRectangle( new PDRectangle(x, y, 15 , 15 )); widget.setAppearanceCharacteristics(appearanceCharacteristics); PDBorderStyleDictionary borderStyleDictionary = new PDBorderStyleDictionary(); borderStyleDictionary.setWidth( 1 ); borderStyleDictionary.setStyle(PDBorderStyleDictionary.STYLE_SOLID); widget.setBorderStyle(borderStyleDictionary); widget.setPage(page); COSDictionary apNDict = new COSDictionary(); apNDict.setItem(COSName.Off, createRadioButtonAppearanceStream(document, widget, false )); apNDict.setItem(buttonList.get(i).getValue(), createRadioButtonAppearanceStream(document, widget, true )); PDAppearanceDictionary appearance = new PDAppearanceDictionary(); PDAppearanceEntry appearanceNEntry = new PDAppearanceEntry(apNDict); appearance.setNormalAppearance(appearanceNEntry); widget.setAppearance(appearance); widget.setAppearanceState( "Off" ); // don't forget this, or button will be invisible widgets.add(widget); page.getAnnotations().add(widget); addText(document, page, buttonList.get(i).getName(), x + 25 , y+ 3 , false ); } radioButton.setWidgets(widgets); acroForm.getFields().add(radioButton); radioButton.setValue(defaultValue); } catch (IOException e) { e.printStackTrace(); } } private static PDAppearanceStream createCheckBoxAppearanceStream( final PDDocument document, PDAnnotationWidget widget, boolean on) throws IOException { PDRectangle rect = widget.getRectangle(); PDAppearanceCharacteristicsDictionary appearanceCharacteristics; PDAppearanceStream yesAP = new PDAppearanceStream(document); yesAP.setBBox( new PDRectangle(rect.getWidth(), rect.getHeight())); yesAP.setResources( new PDResources()); PDPageContentStream yesAPCS = new PDPageContentStream(document, yesAP); appearanceCharacteristics = widget.getAppearanceCharacteristics(); PDColor backgroundColor = appearanceCharacteristics.getBackground(); PDColor borderColor = appearanceCharacteristics.getBorderColour(); float lineWidth = getLineWidth(widget); yesAPCS.setLineWidth(lineWidth); // border style (dash) ignored yesAPCS.setNonStrokingColor(backgroundColor); yesAPCS.addRect( 0 , 0 , rect.getWidth(), rect.getHeight()); yesAPCS.fill(); yesAPCS.setStrokingColor(borderColor); yesAPCS.addRect(lineWidth / 2 , lineWidth / 2 , rect.getWidth() - lineWidth, rect.getHeight() - lineWidth); yesAPCS.stroke(); if (!on) { yesAPCS.close(); return yesAP; } yesAPCS.addRect(lineWidth, lineWidth, rect.getWidth() - lineWidth * 2 , rect.getHeight() - lineWidth * 2 ); yesAPCS.clip(); String normalCaption = appearanceCharacteristics.getNormalCaption(); if (normalCaption == null ) { normalCaption = "4" ; // Adobe behaviour } if ( "8" .equals(normalCaption)) { // Adobe paints a cross instead of using the Zapf Dingbats cross symbol yesAPCS.setStrokingColor(0f); yesAPCS.moveTo(lineWidth * 2 , rect.getHeight() - lineWidth * 2 ); yesAPCS.lineTo(rect.getWidth() - lineWidth * 2 , lineWidth * 2 ); yesAPCS.moveTo(rect.getWidth() - lineWidth * 2 , rect.getHeight() - lineWidth * 2 ); yesAPCS.lineTo(lineWidth * 2 , lineWidth * 2 ); yesAPCS.stroke(); } else { // The caption is not unicode, but the Zapf Dingbats code in the PDF // Thus convert it back to unicode // Assume that only the first character is used. String name = PDType1Font.ZAPF_DINGBATS.codeToName(normalCaption.codePointAt( 0 )); String unicode = PDType1Font.ZAPF_DINGBATS.getGlyphList().toUnicode(name); Rectangle2D bounds = PDType1Font.ZAPF_DINGBATS.getPath(name).getBounds2D(); float size = ( float ) Math.min(bounds.getWidth(), bounds.getHeight()) / 1000 ; // assume that checkmark has square size // the calculations approximate what Adobe is doing, i.e. put the glyph in the middle float fontSize = (rect.getWidth() - lineWidth * 2 ) / size * 0 .6666f; float xOffset = ( float ) (rect.getWidth() - (bounds.getWidth()) / 1000 * fontSize) / 2 ; xOffset -= bounds.getX() / 1000 * fontSize; float yOffset = ( float ) (rect.getHeight() - (bounds.getHeight()) / 1000 * fontSize) / 2 ; yOffset -= bounds.getY() / 1000 * fontSize; yesAPCS.setNonStrokingColor(0f); yesAPCS.beginText(); yesAPCS.setFont(PDType1Font.ZAPF_DINGBATS, fontSize); yesAPCS.newLineAtOffset(xOffset, yOffset); yesAPCS.showText(unicode); yesAPCS.endText(); } yesAPCS.close(); return yesAP; } private static PDAppearanceStream createRadioButtonAppearanceStream( final PDDocument document, PDAnnotationWidget widget, boolean on) throws IOException { PDRectangle rect = widget.getRectangle(); PDAppearanceStream onAP = new PDAppearanceStream(document); onAP.setBBox( new PDRectangle(rect.getWidth(), rect.getHeight())); PDPageContentStream onAPCS = new PDPageContentStream(document, onAP); PDAppearanceCharacteristicsDictionary appearanceCharacteristics = widget.getAppearanceCharacteristics(); PDColor backgroundColor = appearanceCharacteristics.getBackground(); PDColor borderColor = appearanceCharacteristics.getBorderColour(); float lineWidth = getLineWidth(widget); onAPCS.setLineWidth(lineWidth); // border style (dash) ignored onAPCS.setNonStrokingColor(backgroundColor); float radius = Math.min(rect.getWidth() / 2 , rect.getHeight() / 2 ); drawCircle(onAPCS, rect.getWidth() / 2 , rect.getHeight() / 2 , radius); onAPCS.fill(); onAPCS.setStrokingColor(borderColor); drawCircle(onAPCS, rect.getWidth() / 2 , rect.getHeight() / 2 , radius - lineWidth / 2 ); onAPCS.stroke(); if (on) { onAPCS.setNonStrokingColor(0f); drawCircle(onAPCS, rect.getWidth() / 2 , rect.getHeight() / 2 , (radius - lineWidth) / 2 ); onAPCS.fill(); } onAPCS.close(); return onAP; } private static float getLineWidth(PDAnnotationWidget widget) { PDBorderStyleDictionary bs = widget.getBorderStyle(); if (bs != null ) { return bs.getWidth(); } return 1 ; } private static void drawCircle(PDPageContentStream cs, float x, float y, float r) throws IOException { float magic = r * 0 .551784f; cs.moveTo(x, y + r); cs.curveTo(x + magic, y + r, x + r, y + magic, x + r, y); cs.curveTo(x + r, y - magic, x + magic, y - r, x, y - r); cs.curveTo(x - magic, y - r, x - r, y - magic, x - r, y); cs.curveTo(x - r, y + magic, x - magic, y + r, x, y + r); cs.closePath(); } } class Button { private String name = "" ; private String value = "" ; public String getName() { return name; } public void setName(String name) { this .name = name; } public String getValue() { return value; } public void setValue(String value) { this .value = value; } } </pdannotationwidget></pdannotationwidget></string></string></button> |
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