保存的文本字段值在使用PDFBOX生成的PDF中无法正确显示 [英] Saved Text Field value is not displayed properly in PDF generated using PDFBOX
问题描述
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.interactive.action.PDAnnotationAdditionalActions;
import org.apache.pdfbox.pdmodel.interactive.action.type.PDActionJavaScript;
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);
COSDictionary acroFormDict = new COSDictionary();
// acroFormDict.setBoolean(COSName.getPDFName("NeedAppearances"), true);
acroFormDict.setItem(COSName.getPDFName("Fields"), new COSArray());
PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict);
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("/Helv 7 Tf 0 g"));
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();
}
}
问题＃1
我创建了一个文本字段，如上面的代码所示，并尝试使用textbox.setValue（Test Value）设置值;方法，但它给出错误，如下所示：
Issue#1 I have created one text field as shown in above code and tried to set value using textbox.setValue("Test Value"); method but it is giving error as shown below :
java.io.IOException: Error: Don't know how to calculate the position for non-simple fonts
at org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.getTextPosition(PDAppearance.java:1037)
at org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.insertGeneratedAppearance(PDAppearance.java:558)
at org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.setAppearanceValue(PDAppearance.java:338)
at org.apache.pdfbox.pdmodel.interactive.form.PDVariableText.setValue(PDVariableText.java:131)
at sample.pdfbox.example.TestPDTextbox.Sample1(TestPDTextbox.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
问题＃2
Issue#2
为了解决问题＃1，如果我使用cosDictionary属性设置textBox的值
即cosDict1.setItem（COSName.V，new COSString（Test Value1）） ）;
In order to fix issue#1, If I set value of textBox using cosDictionary property i.e. cosDict1.setItem(COSName.V, new COSString("Test Value1"));
然后在Adobe Reader中，textBox的值未正确填充。
我必须单击文本框然后才会显示值，一旦我从字段中移出，值再次变为不可见。
Then in Adobe Reader, value of textBox is not populated properly. I have to click on textbox and then only value appears, and once I move out from the field, value again gets invisible.
第3期
Issue#3
为了修复问题＃2，我需要将needAppearances标志设置为true，如下所示，然后在PDF中正确显示该字段值。但在此解决方案之后，一旦用户更改字段值，我就无法提取/解析PDF字段，我们再次解析此PDF。
In order to fix issue#2, I need to set needAppearances flag to true as shown below, and after that field value is displayed properly in PDF. But after this solution, I`m not able to extract/parse PDF field back once user changes field value and we again parse this PDF.
注意： - Adobe Reader中存在此问题，此处打开PDF时，它会提供一些消息，如修复表单字段。一旦我保存PDF并尝试解析acroform字段，就会发现所有字段都被重置或为空。无法提取字段名称或字段值。
Note:- This issue exists in Adobe Reader, here while opening PDF it gives some message too like fixing form fields up. And once I save PDF and tried to parse acroform fields, all fields are found to be reset or null. None of the field name or field values can be extracted.
因此使用acroFormDict.setBoolean（COSName.getPDFName（NeedAppearances），true）;在代码中似乎有风险，它会在PDF解析中产生其他问题，因此无法使用。
So using acroFormDict.setBoolean(COSName.getPDFName("NeedAppearances"), true); in code seems risky and it creates other issue in PDF parsing so it cannot be used.
COSDictionary acroFormDict = new COSDictionary();
acroFormDict.setBoolean(COSName.getPDFName("NeedAppearances"), true);
acroFormDict.setItem(COSName.getPDFName("Fields"), new COSArray());
PDAcroForm acroForm = new PDAcroForm(doc, acroFormDict);
doc.getDocumentCatalog().setAcroForm(acroForm);
我想，我需要为文本字段设置PDAppearanceDictionary，但我不知道这样做和是否需要为每个字段或acroform级别设置。
I think, I need to set PDAppearanceDictionary for text fields but I don`t know to do that and whether I need to set for each field or at acroform level.
请帮助我解决此问题我应该如何解决。
我正在使用PDFBOX版本1.8.10。
Please help me with this issue how should I resolve. I`m using PDFBOX version 1.8.10.
推荐答案
在上面的问题中，我通过添加修复了问题＃1用于acroform的页面资源，并为文本使用了正确的Default Appearance字符串。现在我不需要将needsAppearance标志设置为true。
In above question, I fixed Issue#1 by adding page resources to acroform and used proper Default Appearance string for text. Now I don`t event require to set needsAppearance flag to 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);
检查下面的整个更正代码：
Check entire corrected code below:
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();
}
}
这篇关于保存的文本字段值在使用PDFBOX生成的PDF中无法正确显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
