我希望有人可以帮助我解决使用 PdfBox 2.x 创建的 PDF 上的按钮和文本字段问题。
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一个日期。这很好用。
然后我尝试将文本字段和按钮放在一个多页的文档中，以便文本字段和按钮出现在每个页面上，但是这样，页面上的按钮仅将日期写入文本字段我点击了按钮所在的页面。
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作出反应，但第一页是按钮作出反应的唯一页面。
然后我保存了 4 个文档，每个文档一页，每个文档都运行良好。但是当最后我将 4 个文档合并为一个 4 页时，我收到了与以前相同的问题。
有人可以告诉我，这里有什么问题吗？
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();
}
}