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。
我尝试在我的页面上放置一个按钮，该按钮使用 Javascript 函数在文本字段中设置日期。效果很好。
然后，我尝试将文本字段和按钮放在多页文档中，以便文本字段和按钮出现在每一页上，但这样，页面上的按钮仅将日期写入到上的文本字段我点击的按钮所在的页面。
从那时起，我收到了问题，第一页上的按钮对第一页上的文本字段做出了反应，但第一页是按钮做出反应的唯一页面。
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 页的文档时，我遇到了与之前相同的问题。
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();
}
}
