在上述问题中，我通过将页面资源添加到acroform中来修复了Issue＃1，并为文本使用了正确的Default
Appearance字符串。现在，我不再需要将needsAppearance标志设置为true。
PDFont font = PDType1Font.HELVETICA; PDResources res = new PDResources(); String fontName = res.addFont(font); String defaultAppearance = "/"+fontName+" 7 Tf 0 g"; COSDictionary acroFormDict = new COSDictionary(); acroFormDict.setBoolean(COSName.getPDFName("NeedAppearances"), false); acroFormDict.setItem(COSName.getPDFName("Fields"), new COSArray()); acroFormDict.setItem(COSName.DA, new COSString(defaultAppearance)); PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict); acroForm.setDefaultResources(res);检查以下完整的更正代码：
import java.io.IOException;import javax.swing.text.BadLocationException;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.exceptions.COSVisitorException;import org.apache.pdfbox.pdmodel.PDdocument;import org.apache.pdfbox.pdmodel.PDPage;import org.apache.pdfbox.pdmodel.PDResources;import org.apache.pdfbox.pdmodel.font.PDFont;import org.apache.pdfbox.pdmodel.font.PDType1Font;import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;import org.apache.pdfbox.pdmodel.interactive.form.PDTextbox;import org.junit.Test;public class TestPDTextbox { @Test public void Sample1 () throws IOException, COSVisitorException, BadLocationException { PDdocument doc = new PDdocument(); PDPage page = new PDPage(); doc.addPage(page); PDFont font = PDType1Font.HELVETICA; PDResources res = new PDResources(); String fontName = res.addFont(font); String defaultAppearance = "/"+fontName+" 7 Tf 0 g"; COSDictionary acroFormDict = new COSDictionary(); acroFormDict.setBoolean(COSName.getPDFName("NeedAppearances"), false); acroFormDict.setItem(COSName.getPDFName("Fields"), new COSArray()); acroFormDict.setItem(COSName.DA, new COSString(defaultAppearance)); PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict); acroForm.setDefaultResources(res); doc.getdocumentCatalog().setAcroForm(acroForm); COSDictionary cosDict1 = new COSDictionary(); COSArray rect1 = new COSArray(); rect1.add(new COSFloat(100)); rect1.add(new COSFloat(700)); rect1.add(new COSFloat(200)); rect1.add(new COSFloat(750)); cosDict1.setItem(COSName.RECT, rect1); cosDict1.setItem(COSName.FT, COSName.getPDFName("Tx")); // Field Type cosDict1.setItem(COSName.TYPE, COSName.ANNOT); cosDict1.setItem(COSName.SUBTYPE, COSName.getPDFName("Widget")); cosDict1.setItem(COSName.T, new COSString("tx1")); cosDict1.setItem(COSName.DA, new COSString(defaultAppearance));// cosDict1.setItem(COSName.V, new COSString("Test Value1")); PDTextbox textbox = new PDTextbox(doc.getdocumentCatalog().getAcroForm(), cosDict1); textbox.setValue("Test Value"); page.getAnnotations().add(textbox.getWidget()); acroForm.getFields().add(textbox); doc.save("C:\PDF\SampleTextbox.pdf"); doc.close(); }}
