我想通过java创建一个pdf文件,其中包含两个列表框。选择列表框 1 的项目应该修改列表框 2 的项目。我了解到这需要 JavaScript。我怎样才能用java编写这个代码呢?到目前为止我正在使用 pdfbox。
我用谷歌搜索了很多,但找不到完整的例子。请参阅下面我的代码,它创建了一个列表框、一个文本字段和一个签名字段。
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.*;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.encryption.InvalidPasswordException;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.interactive.action.PDAction;
import org.apache.pdfbox.pdmodel.interactive.action.PDActionJavaScript;
import org.apache.pdfbox.pdmodel.interactive.action.PDAnnotationAdditionalActions;
import org.apache.pdfbox.pdmodel.interactive.action.PDFormFieldAdditionalActions;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAnnotationWidget;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceDictionary;
import org.apache.pdfbox.pdmodel.interactive.annotation.PDAppearanceStream;
import org.apache.pdfbox.pdmodel.interactive.form.*;
import java.awt.*;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
public class PDFCreate {
public static void main(String[] args) {
System.out.println("Creating pdf docoument including signature field");
try {
// Create a new document with an empty page.
PDDocument document = new PDDocument();
PDPage page = new PDPage(PDRectangle.A4);
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);
PDDocumentCatalog pdCatalog = document.getDocumentCatalog();
PDAcroForm pdAcroForm = new PDAcroForm(document);
pdCatalog.setAcroForm(pdAcroForm);
pdAcroForm.setDefaultResources(resources);
String defaultAppearanceString = "/Helv 0 Tf 0 g";
pdAcroForm.setDefaultAppearance(defaultAppearanceString);
PDTextField textBox = new PDTextField(pdAcroForm);
textBox.setPartialName("newTextField");
defaultAppearanceString = "/Helv 12 Tf 0 g";
textBox.setDefaultAppearance(defaultAppearanceString);
pdAcroForm.getFields().add(textBox);
PDAnnotationWidget widget = textBox.getWidgets().get(0);
PDRectangle rect = new PDRectangle(50, 750, 200, 50);
widget.setRectangle(rect);
widget.setPage(page);
// make sure the annotation is visible on screen and paper
widget.setPrinted(true);
// Add the annotation to the page
page.getAnnotations().add(widget);
textBox.setValue("value in newly created text field");
PDListBox pdListBox = new PDListBox(pdAcroForm);
pdListBox.setPartialName("newListBox");
List<String> displayList = Arrays.asList("option 1", "option 2", "option 3");
List<String> exportList = Arrays.asList("option 1 key", "option 2 key", "option 3");
pdListBox.setOptions(exportList, displayList );
defaultAppearanceString = "/Helv 12 Tf 0 g";
pdListBox.setDefaultAppearance(defaultAppearanceString);
pdAcroForm.getFields().add(pdListBox);
PDAnnotationWidget widget2 = pdListBox.getWidgets().get(0);
PDRectangle rect2 = new PDRectangle(50, 680, 200, 50);
widget2.setRectangle(rect2);
widget2.setPage(page);
// make sure the annotation is visible on screen and paper
widget2.setPrinted(true);
PDFormFieldAdditionalActions pdFormFieldAdditionalActions = new PDFormFieldAdditionalActions();
PDActionJavaScript jsChangedAction = new PDActionJavaScript();
jsChangedAction.setAction("app.alert(\"On 'change' action\")");
pdFormFieldAdditionalActions.setC((PDAction) jsChangedAction);
pdListBox.setActions(pdFormFieldAdditionalActions);
// Add the annotation to the page
page.getAnnotations().add(widget2);
pdListBox.setValue("option 2 key");
PDRectangle rect3 = new PDRectangle(50, 150, 200, 50);
PDAppearanceDictionary appearanceDictionary = new PDAppearanceDictionary();
PDAppearanceStream appearanceStream = new PDAppearanceStream(document);
appearanceStream.setBBox(rect3.createRetranslatedRectangle());
appearanceStream.setResources(resources);
appearanceDictionary.setNormalAppearance(appearanceStream);
PDPageContentStream contentStream = new PDPageContentStream(document, appearanceStream);
contentStream.setStrokingColor(Color.BLACK);
contentStream.setNonStrokingColor(Color.LIGHT_GRAY);
contentStream.setLineWidth(2);
contentStream.addRect(0, 0, rect3.getWidth(), rect3.getHeight());
contentStream.fill();
contentStream.moveTo(1 * rect3.getHeight() / 4, 1 * rect3.getHeight() / 4);
contentStream.lineTo(2 * rect3.getHeight() / 4, 3 * rect3.getHeight() / 4);
contentStream.moveTo(1 * rect3.getHeight() / 4, 3 * rect3.getHeight() / 4);
contentStream.lineTo(2 * rect3.getHeight() / 4, 1 * rect3.getHeight() / 4);
contentStream.moveTo(3 * rect3.getHeight() / 4, 1 * rect3.getHeight() / 4);
contentStream.lineTo(rect3.getWidth() - rect3.getHeight() / 4, 1 * rect3.getHeight() / 4);
contentStream.stroke();
contentStream.setNonStrokingColor(Color.DARK_GRAY);
contentStream.beginText();
contentStream.setFont(font, rect3.getHeight() / 5);
contentStream.newLineAtOffset(3 * rect3.getHeight() / 4, -font.getBoundingBox().getLowerLeftY() * rect3.getHeight() / 5000);
contentStream.showText("Customer");
contentStream.endText();
contentStream.close();
PDSignatureField signatureField = new PDSignatureField(pdAcroForm);
signatureField.setPartialName("SignatureField");
PDAnnotationWidget widget3 = signatureField.getWidgets().get(0);
widget3.setAppearance(appearanceDictionary);
widget3.setRectangle(rect3);
widget3.setPage(page);
page.getAnnotations().add(widget3);
pdAcroForm.getFields().add(signatureField);
PDFormFieldAdditionalActions pdFormAdditionalActions = new PDFormFieldAdditionalActions();
String javaScript = "app.alert( {cMsg: 'this is an example', nIcon: 3,"
+ " nType: 0,cTitle: 'PDFBox Javascript example' } );";
PDActionJavaScript PDAjavascript = new PDActionJavaScript(javaScript);
pdFormAdditionalActions.setC(PDAjavascript);
/* PDActionJavaScript(PDAjavascript); */
pdListBox.setActions(pdFormAdditionalActions);
pdListBox.getActions().getCOSObject().addAll(pdFormAdditionalActions.getCOSObject());
//document.getDocumentCatalog().setOpenAction(PDAjavascript);
document.save("create from empty.pdf");
for (PDField pdField : pdAcroForm.getFields()) {
System.out.println(pdField.getFullyQualifiedName() + " " + pdField.getFieldType() + " " + pdField.getValueAsString());
}
document.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
我的代码中更改的操作从未显示任何效果。更重要的是,我需要帮助来添加一个操作,该操作将根据第一个列表框的所选项目更改第二个列表框的条目。提前致谢!
最佳答案
//以下解决了问题:
//定义列表框内容。
String javaScript = "+ "this.getField('signatureField').display=display.hidden;"+ "var formReady = false;"+ "var anacredit = { '-': [['-', ' -']], "+ "'卢森堡': [[ '-', '-'], ['LU01 个体企业', 'LU01'],[ 'LU06 Société anonyme', 'LU06'] ,['LU14 Société Civile','LU14']] , "+ "'德国': [[ '-', '-'], ['DE201 Aktiengesellschaft', 'DE201'], ['DE602 EV', 'DE602'], ['DE205 Investmentaktiengesellschaft', 'DE205']], "+ "'希腊': [[ '-', '-'], ['GR906 Εταιρία Περιορισμένnς Ευθύνnς/Etería', 'GR906'], ['GR912 Κοινο πραία' , 'GR912'], ['GR999 Λοιπά', 'GR999']] };";
//列表框 1 的 JavaScript
String jsListBox0 = "var f = this.getField('domicilation');"+“var r = this.getField('legalForm');” + "console.println('dom' + f.value + 'lF' + r.value);"+ "if (event.willCommit)"+ "{ console.println('dom EC' + event.change + 'EV' + event.value + 'ECE' + event.changeEx); "+ "r.setItems( anacredit [事件.值] );"+ "this.getField('signatureField').display=display.hidden;"+“r.value='-';” +“}”;
//列表框1的相关java代码
jsKeylinesAction.setAction(jsListBox0); fieldActions.setK(jsKeylinesAction); domicilation.setActions(fieldActions);
//列表框 2 的 JavaScript
String jsListBox2 = "var lb = this.getField('legalForm'); var d = this.getField('domicilation');"+“var sf = this.getField('signatureField');” + "if (!event.willCommit) "+ "{ console.println('lF' + lb.value + 'EC' + event.change + 'EV' + event.value + 'ECE' + event.changeEx); ” + "if ((event.changeEx =='-') || (event.changeEx == null)) sf.display = display.hidden;"+ "else sf.display = display.visible}";
//列表框2的相关java代码
jsKeyStrokeAction.setAction(jsListBox2); fieldActions2.setK(jsKeyStrokeAction); legalForm.setActions(fieldActions2);
关于javascript - 如何使用java将javascript代码添加到pdf,该代码根据另一个列表框的所选项目更改列表框内容,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56331004/