使用 PDFBox 在 PDF 上放置一个按钮 2.x
Put a Button on PDF with PDFBox 2.x
我希望有人能帮助我解决我使用 PdfBox 创建的 PDF 上的按钮和文本字段问题 2.x。
我试图在我的页面上放置一个按钮，它使用 Javascript 函数在文本字段中设置日期。效果不错。
然后我尝试将Textfield和Button放在一个多页的Document中，这样Textfield和Button就会出现在每一页上，但是那样的话，页面上的Button写了Date只到按钮所在页面上的文本字段，我点击了。
从那以后我收到问题，第一页上的按钮对第一页上的文本字段有反应，但第一页是按钮反应的唯一页面。
然后我保存了 4 个文档，每个文档一页，每个文档都很好。
但是最后当我将4个文档合并为一个4页的文档时，我遇到了与以前相同的问题。
谁能告诉我，这是什么问题？
谢谢
托马斯
这是我的 Java-代码：
import java.io.File;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSFloat;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSString;
import org.apache.pdfbox.io.MemoryUsageSetting;
import org.apache.pdfbox.multipdf.PDFMergerUtility;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDResources;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.graphics.color.PDColor;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB;
import org.apache.pdfbox.pdmodel.interactive.action.PDActionJavaScript;
import org.apache.pdfbox.pdmodel.interactive.action.PDAnnotationAdditionalActions;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationWidget;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceCharacteristicsDictionary;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceStream;
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
import org.apache.pdfbox.pdmodel.interactive.form.PDPushButton;
import org.apache.pdfbox.pdmodel.interactive.form.PDTextField;
public class ScriptButton {
public static void main(String[] args) throws IOException {
List<PDDocument> aDocList = new ArrayList<PDDocument>();
String destall = ".\DS216J\home\01Privat\Script_Button_all.pdf";
DecimalFormat DFMM = new DecimalFormat("00");
for (int i = 0; i < 4; i++) {
PDDocument doc = new PDDocument();
PDPage page = new PDPage();
doc.addPage(page);
COSDictionary acroFormDict = new COSDictionary();
acroFormDict
.setBoolean(COSName.getPDFName("NeedAppearances"), true);
acroFormDict.setItem(COSName.FIELDS, new COSArray());
PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict);
doc.getDocumentCatalog().setAcroForm(acroForm);
PDAnnotationAdditionalActions buttonAction1 = null;
PDActionJavaScript javascript = null;
PDActionJavaScript tfJs = null;
String iStr = DFMM.format(i);
String dest = ".\DS216J\home\01Privat\Script_Button_" + iStr
+ ".pdf";
PDFont font = PDType1Font.HELVETICA;
PDResources resources = new PDResources();
resources.put(COSName.getPDFName("Helvetica"), font);
acroForm.setDefaultResources(resources);
PDAppearanceStream pdAppearanceStream = new PDAppearanceStream(doc);
pdAppearanceStream.setResources(resources);
PDTextField textField = new PDTextField(acroForm);
textField.setPartialName("SampleField-" + iStr);
String defaultAppearance = "/Helv 24 Tf 0 0 0 rg";
textField.setDefaultAppearance(defaultAppearance);
textField.setMultiline(true);
textField.setValue("Click to get Date");
acroForm.getFields().add(textField);
PDAnnotationWidget fieldwidget = textField.getWidgets().get(0);
PDRectangle rect = new PDRectangle(50, 600, 300, 70);
fieldwidget.setRectangle(rect);
fieldwidget.setPage(page);
PDAppearanceCharacteristicsDictionary fieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
fieldAppearance.setBorderColour(new PDColor(
new float[] { 0, 0, 0 }, PDDeviceRGB.INSTANCE));
fieldAppearance.setBackground(new PDColor(new float[] { 1, 1, 1 },
PDDeviceRGB.INSTANCE));
fieldwidget.setAppearanceCharacteristics(fieldAppearance);
fieldwidget.setPrinted(true);
page.getAnnotations().add(fieldwidget);
COSDictionary cosDict1 = new COSDictionary();
COSArray buttonRect1 = new COSArray();
buttonRect1.add(new COSFloat(50));
buttonRect1.add(new COSFloat(575));
buttonRect1.add(new COSFloat(150));
buttonRect1.add(new COSFloat(550));
cosDict1.setItem(COSName.RECT, buttonRect1);
cosDict1.setItem(COSName.FT, COSName.getPDFName("Btn")); // Field
// Type
cosDict1.setItem(COSName.TYPE, COSName.ANNOT);
cosDict1.setItem(COSName.SUBTYPE, COSName.getPDFName("Widget"));
cosDict1.setItem(COSName.T, new COSString("Datum anzeigen"));
cosDict1.setItem(COSName.DA,
new COSString("/F0 6 Tf 0 g 1 1 1 rg "));
PDPushButton button1 = new PDPushButton(acroForm);
javascript = new PDActionJavaScript("function date" + iStr
+ "() {var fld" + iStr + " = this.getField('SampleField-"
+ iStr + "'); fld" + iStr
+ ".value = util.printd('dd mmmm yyyy',new Date());}");
doc.getDocumentCatalog().setOpenAction(javascript);
tfJs = new PDActionJavaScript("date" + iStr + "();");
buttonAction1 = new PDAnnotationAdditionalActions();
buttonAction1.setU(tfJs);
button1.getWidgets().get(0).setActions(buttonAction1);
button1.getCOSObject().addAll(cosDict1);
acroForm.getFields().add(button1);
PDAnnotationWidget buttonWidget1 = button1.getWidgets().get(0);
PDAppearanceCharacteristicsDictionary buttonFieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
COSArray borderColorArray = new COSArray();
borderColorArray.add(new COSFloat((float) (141f / 255f)));
borderColorArray.add(new COSFloat((float) (179f / 255f)));
borderColorArray.add(new COSFloat((float) (226f / 255f)));
PDColor blue = new PDColor(borderColorArray, PDDeviceRGB.INSTANCE);
buttonFieldAppearance.setBorderColour(blue);
buttonFieldAppearance.setBackground(blue);
buttonFieldAppearance.setNormalCaption("Felder löschen");
buttonWidget1.setAppearanceCharacteristics(buttonFieldAppearance);
page.getAnnotations().add(buttonWidget1);
File file = new File(dest);
file.getParentFile().mkdirs();
doc.save(dest);
doc.close();
aDocList.add(doc);
}
PDDocument aDocWithallPages = new PDDocument();
PDFMergerUtility PDFmerger = new PDFMergerUtility();
PDFmerger.setDestinationFileName(destall);
int i = 0;
for (Iterator<PDDocument> iterator = aDocList.iterator(); iterator
.hasNext();) {
iterator.next();
String iStr = DFMM.format(i);
File newFile = new File(".\DS216J\home\01Privat\Script_Button_"
+ iStr + ".pdf");
PDFmerger.addSource(newFile);
i = i + 1;
}
PDFmerger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
aDocWithallPages.close();
}
}
第二种解决方案（合并）不可行，因为PDFBox 无法更改JS 代码。第一个解决方案（你没有显示）我试图重新创建，恕我直言，一个问题是 OpenAction 中只有一个日期函数。您需要 JavaScript 名称树中的每个函数（您甚至可以在没有所有字段的情况下工作，但我没有测试）：
public static void main(String[] args) throws IOException
{
String dest = "SO52807807.pdf";
Map<String, PDActionJavaScript> map = new HashMap<>();
DecimalFormat DFMM = new DecimalFormat("00");
try (PDDocument doc = new PDDocument())
{
PDDocumentNameDictionary documentNameDictionary = new PDDocumentNameDictionary(doc.getDocumentCatalog());
PDJavascriptNameTreeNode javascriptNameTreeNode = new PDJavascriptNameTreeNode();
documentNameDictionary.setJavascript(javascriptNameTreeNode);
COSDictionary acroFormDict = new COSDictionary();
acroFormDict
.setBoolean(COSName.getPDFName("NeedAppearances"), true);
acroFormDict.setItem(COSName.FIELDS, new COSArray());
PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict);
doc.getDocumentCatalog().setAcroForm(acroForm);
for (int i = 0; i < 4; i++)
{
PDPage page = new PDPage();
doc.addPage(page);
PDAnnotationAdditionalActions buttonAction1 = null;
PDActionJavaScript javascript = null;
PDActionJavaScript tfJs = null;
String iStr = DFMM.format(i);
PDFont font = PDType1Font.HELVETICA;
PDResources resources = new PDResources();
resources.put(COSName.getPDFName("Helv"), font);
acroForm.setDefaultResources(resources);
PDAppearanceStream pdAppearanceStream = new PDAppearanceStream(doc);
pdAppearanceStream.setResources(resources);
PDTextField textField = new PDTextField(acroForm);
textField.setPartialName("SampleField-" + iStr);
String defaultAppearance = "/Helv 24 Tf 0 0 0 rg";
textField.setDefaultAppearance(defaultAppearance);
textField.setMultiline(true);
acroForm.getFields().add(textField);
PDAnnotationWidget fieldwidget = textField.getWidgets().get(0);
PDRectangle rect = new PDRectangle(50, 600, 300, 70);
fieldwidget.setRectangle(rect);
fieldwidget.setPage(page);
textField.setValue("Click to get Date");
PDAppearanceCharacteristicsDictionary fieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
fieldAppearance.setBorderColour(new PDColor(
new float[]
{
0, 0, 0
}, PDDeviceRGB.INSTANCE));
fieldAppearance.setBackground(new PDColor(new float[]
{
1, 1, 1
},
PDDeviceRGB.INSTANCE));
fieldwidget.setAppearanceCharacteristics(fieldAppearance);
fieldwidget.setPrinted(true);
page.getAnnotations().add(fieldwidget);
COSDictionary cosDict1 = new COSDictionary();
COSArray buttonRect1 = new COSArray();
buttonRect1.add(new COSFloat(50));
buttonRect1.add(new COSFloat(575));
buttonRect1.add(new COSFloat(150));
buttonRect1.add(new COSFloat(550));
cosDict1.setItem(COSName.RECT, buttonRect1);
cosDict1.setItem(COSName.FT, COSName.getPDFName("Btn")); // Field
// Type
cosDict1.setItem(COSName.TYPE, COSName.ANNOT);
cosDict1.setItem(COSName.SUBTYPE, COSName.getPDFName("Widget"));
cosDict1.setItem(COSName.T, new COSString("Datum anzeigen"));
cosDict1.setItem(COSName.DA,
new COSString("/F0 6 Tf 0 g 1 1 1 rg "));
PDPushButton button1 = new PDPushButton(acroForm);
javascript = new PDActionJavaScript("function date" + iStr
+ "() {var fld" + iStr + " = this.getField('SampleField-"
+ iStr + "'); fld" + iStr
+ ".value = util.printd('dd mmmm yyyy',new Date());}");
//doc.getDocumentCatalog().setOpenAction(javascript);
map.put("date" + iStr, javascript);
tfJs = new PDActionJavaScript("date" + iStr + "();");
buttonAction1 = new PDAnnotationAdditionalActions();
buttonAction1.setU(tfJs);
button1.getWidgets().get(0).setActions(buttonAction1);
button1.getCOSObject().addAll(cosDict1);
acroForm.getFields().add(button1);
PDAnnotationWidget buttonWidget1 = button1.getWidgets().get(0);
PDAppearanceCharacteristicsDictionary buttonFieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
COSArray borderColorArray = new COSArray();
borderColorArray.add(new COSFloat((float) (141f / 255f)));
borderColorArray.add(new COSFloat((float) (179f / 255f)));
borderColorArray.add(new COSFloat((float) (226f / 255f)));
PDColor blue = new PDColor(borderColorArray, PDDeviceRGB.INSTANCE);
buttonFieldAppearance.setBorderColour(blue);
buttonFieldAppearance.setBackground(blue);
buttonFieldAppearance.setNormalCaption("Felder löschen");
buttonWidget1.setAppearanceCharacteristics(buttonFieldAppearance);
page.getAnnotations().add(buttonWidget1);
}
javascriptNameTreeNode.setNames(map);
doc.getDocumentCatalog().setNames(documentNameDictionary);
File file = new File(dest);
file.getParentFile().mkdirs();
doc.save(dest);
}
}
2018 年 10 月 20 日更新：
我对代码做了两处改动：
1) defaultAppearance中的字体名称必须与默认资源("Helv")中的字体名称相同。
2) 必须在分配小部件之后设置字段的值，而不是之前。 （如果你仔细想想，这是有道理的——小部件是关于视觉的）。不这样做可能意味着在用非 Adobe 查看器显示时会遇到麻烦。
更新：25.5.2019：
恕我直言，代码有点笨拙，因为不必设置大多数字典元素。可以在 .
中找到创建按钮的更好版本
我希望有人能帮助我解决我使用 PdfBox 创建的 PDF 上的按钮和文本字段问题 2.x。
我试图在我的页面上放置一个按钮，它使用 Javascript 函数在文本字段中设置日期。效果不错。
然后我尝试将Textfield和Button放在一个多页的Document中，这样Textfield和Button就会出现在每一页上，但是那样的话，页面上的Button写了Date只到按钮所在页面上的文本字段，我点击了。
从那以后我收到问题，第一页上的按钮对第一页上的文本字段有反应，但第一页是按钮反应的唯一页面。
然后我保存了 4 个文档，每个文档一页，每个文档都很好。 但是最后当我将4个文档合并为一个4页的文档时，我遇到了与以前相同的问题。
谁能告诉我，这是什么问题？
谢谢 托马斯
这是我的 Java-代码：
import java.io.File;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSFloat;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSString;
import org.apache.pdfbox.io.MemoryUsageSetting;
import org.apache.pdfbox.multipdf.PDFMergerUtility;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDResources;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.graphics.color.PDColor;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB;
import org.apache.pdfbox.pdmodel.interactive.action.PDActionJavaScript;
import org.apache.pdfbox.pdmodel.interactive.action.PDAnnotationAdditionalActions;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationWidget;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceCharacteristicsDictionary;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceStream;
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
import org.apache.pdfbox.pdmodel.interactive.form.PDPushButton;
import org.apache.pdfbox.pdmodel.interactive.form.PDTextField;
public class ScriptButton {
public static void main(String[] args) throws IOException {
List<PDDocument> aDocList = new ArrayList<PDDocument>();
String destall = ".\DS216J\home\01Privat\Script_Button_all.pdf";
DecimalFormat DFMM = new DecimalFormat("00");
for (int i = 0; i < 4; i++) {
PDDocument doc = new PDDocument();
PDPage page = new PDPage();
doc.addPage(page);
COSDictionary acroFormDict = new COSDictionary();
acroFormDict
.setBoolean(COSName.getPDFName("NeedAppearances"), true);
acroFormDict.setItem(COSName.FIELDS, new COSArray());
PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict);
doc.getDocumentCatalog().setAcroForm(acroForm);
PDAnnotationAdditionalActions buttonAction1 = null;
PDActionJavaScript javascript = null;
PDActionJavaScript tfJs = null;
String iStr = DFMM.format(i);
String dest = ".\DS216J\home\01Privat\Script_Button_" + iStr
+ ".pdf";
PDFont font = PDType1Font.HELVETICA;
PDResources resources = new PDResources();
resources.put(COSName.getPDFName("Helvetica"), font);
acroForm.setDefaultResources(resources);
PDAppearanceStream pdAppearanceStream = new PDAppearanceStream(doc);
pdAppearanceStream.setResources(resources);
PDTextField textField = new PDTextField(acroForm);
textField.setPartialName("SampleField-" + iStr);
String defaultAppearance = "/Helv 24 Tf 0 0 0 rg";
textField.setDefaultAppearance(defaultAppearance);
textField.setMultiline(true);
textField.setValue("Click to get Date");
acroForm.getFields().add(textField);
PDAnnotationWidget fieldwidget = textField.getWidgets().get(0);
PDRectangle rect = new PDRectangle(50, 600, 300, 70);
fieldwidget.setRectangle(rect);
fieldwidget.setPage(page);
PDAppearanceCharacteristicsDictionary fieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
fieldAppearance.setBorderColour(new PDColor(
new float[] { 0, 0, 0 }, PDDeviceRGB.INSTANCE));
fieldAppearance.setBackground(new PDColor(new float[] { 1, 1, 1 },
PDDeviceRGB.INSTANCE));
fieldwidget.setAppearanceCharacteristics(fieldAppearance);
fieldwidget.setPrinted(true);
page.getAnnotations().add(fieldwidget);
COSDictionary cosDict1 = new COSDictionary();
COSArray buttonRect1 = new COSArray();
buttonRect1.add(new COSFloat(50));
buttonRect1.add(new COSFloat(575));
buttonRect1.add(new COSFloat(150));
buttonRect1.add(new COSFloat(550));
cosDict1.setItem(COSName.RECT, buttonRect1);
cosDict1.setItem(COSName.FT, COSName.getPDFName("Btn")); // Field
// Type
cosDict1.setItem(COSName.TYPE, COSName.ANNOT);
cosDict1.setItem(COSName.SUBTYPE, COSName.getPDFName("Widget"));
cosDict1.setItem(COSName.T, new COSString("Datum anzeigen"));
cosDict1.setItem(COSName.DA,
new COSString("/F0 6 Tf 0 g 1 1 1 rg "));
PDPushButton button1 = new PDPushButton(acroForm);
javascript = new PDActionJavaScript("function date" + iStr
+ "() {var fld" + iStr + " = this.getField('SampleField-"
+ iStr + "'); fld" + iStr
+ ".value = util.printd('dd mmmm yyyy',new Date());}");
doc.getDocumentCatalog().setOpenAction(javascript);
tfJs = new PDActionJavaScript("date" + iStr + "();");
buttonAction1 = new PDAnnotationAdditionalActions();
buttonAction1.setU(tfJs);
button1.getWidgets().get(0).setActions(buttonAction1);
button1.getCOSObject().addAll(cosDict1);
acroForm.getFields().add(button1);
PDAnnotationWidget buttonWidget1 = button1.getWidgets().get(0);
PDAppearanceCharacteristicsDictionary buttonFieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
COSArray borderColorArray = new COSArray();
borderColorArray.add(new COSFloat((float) (141f / 255f)));
borderColorArray.add(new COSFloat((float) (179f / 255f)));
borderColorArray.add(new COSFloat((float) (226f / 255f)));
PDColor blue = new PDColor(borderColorArray, PDDeviceRGB.INSTANCE);
buttonFieldAppearance.setBorderColour(blue);
buttonFieldAppearance.setBackground(blue);
buttonFieldAppearance.setNormalCaption("Felder löschen");
buttonWidget1.setAppearanceCharacteristics(buttonFieldAppearance);
page.getAnnotations().add(buttonWidget1);
File file = new File(dest);
file.getParentFile().mkdirs();
doc.save(dest);
doc.close();
aDocList.add(doc);
}
PDDocument aDocWithallPages = new PDDocument();
PDFMergerUtility PDFmerger = new PDFMergerUtility();
PDFmerger.setDestinationFileName(destall);
int i = 0;
for (Iterator<PDDocument> iterator = aDocList.iterator(); iterator
.hasNext();) {
iterator.next();
String iStr = DFMM.format(i);
File newFile = new File(".\DS216J\home\01Privat\Script_Button_"
+ iStr + ".pdf");
PDFmerger.addSource(newFile);
i = i + 1;
}
PDFmerger.mergeDocuments(MemoryUsageSetting.setupMainMemoryOnly());
aDocWithallPages.close();
}
}
第二种解决方案（合并）不可行，因为PDFBox 无法更改JS 代码。第一个解决方案（你没有显示）我试图重新创建，恕我直言，一个问题是 OpenAction 中只有一个日期函数。您需要 JavaScript 名称树中的每个函数（您甚至可以在没有所有字段的情况下工作，但我没有测试）：
public static void main(String[] args) throws IOException
{
String dest = "SO52807807.pdf";
Map<String, PDActionJavaScript> map = new HashMap<>();
DecimalFormat DFMM = new DecimalFormat("00");
try (PDDocument doc = new PDDocument())
{
PDDocumentNameDictionary documentNameDictionary = new PDDocumentNameDictionary(doc.getDocumentCatalog());
PDJavascriptNameTreeNode javascriptNameTreeNode = new PDJavascriptNameTreeNode();
documentNameDictionary.setJavascript(javascriptNameTreeNode);
COSDictionary acroFormDict = new COSDictionary();
acroFormDict
.setBoolean(COSName.getPDFName("NeedAppearances"), true);
acroFormDict.setItem(COSName.FIELDS, new COSArray());
PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict);
doc.getDocumentCatalog().setAcroForm(acroForm);
for (int i = 0; i < 4; i++)
{
PDPage page = new PDPage();
doc.addPage(page);
PDAnnotationAdditionalActions buttonAction1 = null;
PDActionJavaScript javascript = null;
PDActionJavaScript tfJs = null;
String iStr = DFMM.format(i);
PDFont font = PDType1Font.HELVETICA;
PDResources resources = new PDResources();
resources.put(COSName.getPDFName("Helv"), font);
acroForm.setDefaultResources(resources);
PDAppearanceStream pdAppearanceStream = new PDAppearanceStream(doc);
pdAppearanceStream.setResources(resources);
PDTextField textField = new PDTextField(acroForm);
textField.setPartialName("SampleField-" + iStr);
String defaultAppearance = "/Helv 24 Tf 0 0 0 rg";
textField.setDefaultAppearance(defaultAppearance);
textField.setMultiline(true);
acroForm.getFields().add(textField);
PDAnnotationWidget fieldwidget = textField.getWidgets().get(0);
PDRectangle rect = new PDRectangle(50, 600, 300, 70);
fieldwidget.setRectangle(rect);
fieldwidget.setPage(page);
textField.setValue("Click to get Date");
PDAppearanceCharacteristicsDictionary fieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
fieldAppearance.setBorderColour(new PDColor(
new float[]
{
0, 0, 0
}, PDDeviceRGB.INSTANCE));
fieldAppearance.setBackground(new PDColor(new float[]
{
1, 1, 1
},
PDDeviceRGB.INSTANCE));
fieldwidget.setAppearanceCharacteristics(fieldAppearance);
fieldwidget.setPrinted(true);
page.getAnnotations().add(fieldwidget);
COSDictionary cosDict1 = new COSDictionary();
COSArray buttonRect1 = new COSArray();
buttonRect1.add(new COSFloat(50));
buttonRect1.add(new COSFloat(575));
buttonRect1.add(new COSFloat(150));
buttonRect1.add(new COSFloat(550));
cosDict1.setItem(COSName.RECT, buttonRect1);
cosDict1.setItem(COSName.FT, COSName.getPDFName("Btn")); // Field
// Type
cosDict1.setItem(COSName.TYPE, COSName.ANNOT);
cosDict1.setItem(COSName.SUBTYPE, COSName.getPDFName("Widget"));
cosDict1.setItem(COSName.T, new COSString("Datum anzeigen"));
cosDict1.setItem(COSName.DA,
new COSString("/F0 6 Tf 0 g 1 1 1 rg "));
PDPushButton button1 = new PDPushButton(acroForm);
javascript = new PDActionJavaScript("function date" + iStr
+ "() {var fld" + iStr + " = this.getField('SampleField-"
+ iStr + "'); fld" + iStr
+ ".value = util.printd('dd mmmm yyyy',new Date());}");
//doc.getDocumentCatalog().setOpenAction(javascript);
map.put("date" + iStr, javascript);
tfJs = new PDActionJavaScript("date" + iStr + "();");
buttonAction1 = new PDAnnotationAdditionalActions();
buttonAction1.setU(tfJs);
button1.getWidgets().get(0).setActions(buttonAction1);
button1.getCOSObject().addAll(cosDict1);
acroForm.getFields().add(button1);
PDAnnotationWidget buttonWidget1 = button1.getWidgets().get(0);
PDAppearanceCharacteristicsDictionary buttonFieldAppearance = new PDAppearanceCharacteristicsDictionary(
new COSDictionary());
COSArray borderColorArray = new COSArray();
borderColorArray.add(new COSFloat((float) (141f / 255f)));
borderColorArray.add(new COSFloat((float) (179f / 255f)));
borderColorArray.add(new COSFloat((float) (226f / 255f)));
PDColor blue = new PDColor(borderColorArray, PDDeviceRGB.INSTANCE);
buttonFieldAppearance.setBorderColour(blue);
buttonFieldAppearance.setBackground(blue);
buttonFieldAppearance.setNormalCaption("Felder löschen");
buttonWidget1.setAppearanceCharacteristics(buttonFieldAppearance);
page.getAnnotations().add(buttonWidget1);
}
javascriptNameTreeNode.setNames(map);
doc.getDocumentCatalog().setNames(documentNameDictionary);
File file = new File(dest);
file.getParentFile().mkdirs();
doc.save(dest);
}
}
2018 年 10 月 20 日更新：
我对代码做了两处改动：
1) defaultAppearance中的字体名称必须与默认资源("Helv")中的字体名称相同。
2) 必须在分配小部件之后设置字段的值，而不是之前。 （如果你仔细想想，这是有道理的——小部件是关于视觉的）。不这样做可能意味着在用非 Adobe 查看器显示时会遇到麻烦。
更新：25.5.2019：
恕我直言，代码有点笨拙，因为不必设置大多数字典元素。可以在