Develop Reference

Java Apache POI: insert an image "infront the text"

I have a placeholder image in my docx file and I want to replace it with new image. The problem is - the placeholder image has an attribute "in front of text", but the new image has not. As a result the alignment breaks. Here is my code snippet and the docx with placeholder and the resulting docx.
.......
replaceImage(doc, "Рисунок 1", qr, 50, 50);
ByteArrayOutputStream out = new ByteArrayOutputStream();
doc.write(out);
out.close();
return out.toByteArray();
}
}
public XWPFDocument replaceImage(XWPFDocument document, String imageOldName, byte[] newImage, int newImageWidth, int newImageHeight) throws Exception {
try {
int imageParagraphPos = -1;
XWPFParagraph imageParagraph = null;
List<IBodyElement> documentElements = document.getBodyElements();
for (IBodyElement documentElement : documentElements) {
imageParagraphPos++;
if (documentElement instanceof XWPFParagraph) {
imageParagraph = (XWPFParagraph) documentElement;
if (imageParagraph.getCTP() != null && imageParagraph.getCTP().toString().trim().contains(imageOldName)) {
break;
}
}
}
if (imageParagraph == null) {
throw new Exception("Unable to replace image data due to the exception:\n"
+ "'" + imageOldName + "' not found in in document.");
}
ParagraphAlignment oldImageAlignment = imageParagraph.getAlignment();
// remove old image
boolean isDeleted = document.removeBodyElement(imageParagraphPos);
// now add new image
XWPFParagraph newImageParagraph = document.createParagraph();
XWPFRun newImageRun = newImageParagraph.createRun();
newImageParagraph.setAlignment(oldImageAlignment);
try (InputStream is = new ByteArrayInputStream(newImage)) {
newImageRun.addPicture(is, XWPFDocument.PICTURE_TYPE_JPEG, "qr",
Units.toEMU(newImageWidth), Units.toEMU(newImageHeight));
}
// set new image at the old image position
document.setParagraph(newImageParagraph, imageParagraphPos);
// NOW REMOVE REDUNDANT IMAGE FORM THE END OF DOCUMENT
document.removeBodyElement(document.getBodyElements().size() - 1);
return document;
} catch (Exception e) {
throw new Exception("Unable to replace image '" + imageOldName + "' due to the exception:\n" + e);
}
}
The image with placeholder:
enter image description here
The resulting image:
enter image description here

To replace picture templates in Microsoft Word there is no need to delete them.
The storage is as so:
The embedded media is stored as binary file. This is the picture data (XWPFPictureData). In the document a picture element (XWPFPicture) links to that picture data.
The XWPFPicture has settings for position, size and text flow. These dont need to be changed.
The changing is needed in XWPFPictureData. There one can replace the old binary content with the new.
So the need is to find the XWPFPicture in the document. There is a non visual picture name stored while inserting the picture in the document. So if one knows that name, then this could be a criteriea to find the picture.
If found one can get the XWPFPictureData from found XWPFPicture. There is method XWPFPicture.getPictureDatato do so. Then one can replace the old binary content of XWPFPictureData with the new. XWPFPictureData is a package part. So it has PackagePart.getOutputStream to get an output stream to write to.
Following complete example shows that all.
The source.docx needs to have an embedded picture named "QRTemplate.jpg". This is the name of the source file used while inserting the picture into Word document using Word GUI. And there needs to be a file QR.jpg which contains the new content.
The result.docx then has all pictures named "QRTemplate.jpg" replaced with the content of the given file QR.jpg.
import java.io.FileInputStream;
import java.io.OutputStream;
import java.io.FileOutputStream;
import org.apache.poi.xwpf.usermodel.*;
public class WordReplacePictureData {
static XWPFPicture getPictureByName(XWPFRun run, String pictureName) {
if (pictureName == null) return null;
for (XWPFPicture picture : run.getEmbeddedPictures()) {
String nonVisualPictureName = picture.getCTPicture().getNvPicPr().getCNvPr().getName();
if (pictureName.equals(nonVisualPictureName)) {
return picture;
}
}
return null;
}
static void replacePictureData(XWPFPictureData source, String pictureResultPath) {
try ( FileInputStream in = new FileInputStream(pictureResultPath);
OutputStream out = source.getPackagePart().getOutputStream();
) {
byte[] buffer = new byte[2048];
int length;
while ((length = in.read(buffer)) > 0) {
out.write(buffer, 0, length);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
static void replacePicture(XWPFRun run, String pictureName, String pictureResultPath) {
XWPFPicture picture = getPictureByName(run, pictureName);
if (picture != null) {
XWPFPictureData source = picture.getPictureData();
replacePictureData(source, pictureResultPath);
}
}
public static void main(String[] args) throws Exception {
String templatePath = "./source.docx";
String resultPath = "./result.docx";
String pictureTemplateName = "QRTemplate.jpg";
String pictureResultPath = "./QR.jpg";
try ( XWPFDocument document = new XWPFDocument(new FileInputStream(templatePath));
FileOutputStream out = new FileOutputStream(resultPath);
) {
for (IBodyElement bodyElement : document.getBodyElements()) {
if (bodyElement instanceof XWPFParagraph) {
XWPFParagraph paragraph = (XWPFParagraph)bodyElement;
for (XWPFRun run : paragraph.getRuns()) {
replacePicture(run, pictureTemplateName, pictureResultPath);
}
}
}
document.write(out);
}
}
}

I have a dirty workaround. Since the text block on the right side of the image is static, I replaced the text with screen-shot on the original docx. And now, when the placeholder image been substituted by the new image, everything is rendered as expected.

Edit header in dotx/docx file

I am currently trying to generate a new docx file from an existing template in dotx format. I want to change the firstname, lastname, etc. in the header but I'm not able to access them for some reason...
My approach is the following:
public void generateDocX(Long id) throws IOException, InvalidFormatException {
//Get user per id
EmployeeDTO employeeDTO = employeeService.getEmployee(id);
//Location where the new docx file will be saved
FileOutputStream outputStream = new FileOutputStream(new File("/home/user/Documents/project/src/main/files/" + employeeDTO.getId() + "header.docx"));
//Get the template for generating the new docx file
File template = new File("/home/user/Documents/project/src/main/files/template.dotx");
OPCPackage pkg = OPCPackage.open(template);
XWPFDocument document = new XWPFDocument(pkg);
for (XWPFHeader header : document.getHeaderList()) {
List<XWPFParagraph> paragraphs = header.getParagraphs();
System.out.println("Total paragraphs in header are: " + paragraphs.size());
System.out.println("Total elements in the header are: " + header.getBodyElements().size());
for (XWPFParagraph paragraph : paragraphs) {
System.out.println("Paragraph text is: " + paragraph.getText());
List<XWPFRun> runs = paragraph.getRuns();
for (XWPFRun run : runs) {
String runText = run.getText(run.getTextPosition());
System.out.println("Run text is: " + runText);
}
}
}
//Write the changes to the new docx file and close the document
document.write(outputStream);
document.close();
}
The output in the console is either 1, null or empty string... I've tried several approaches from here, here and here but without any luck...
Here is what's inside the template.dotx

IBody.getParagraphs and IBody.getBodyElements- only get the paragraphs or body elements which are directly in that IBody. But your paragraphs are not directly in there but are in a separate text box or text frame. That's why they cannot be got this way.
Since *.docx is a ZIP archive containijg XML files for document, headers and footers, one could get all text runs of one IBody by creating a XmlCursor which selects all w:r XML elements. For a XWPFHeader this could look like so:
private List<XmlObject> getAllCTRs(XWPFHeader header) {
CTHdrFtr ctHdrFtr = header._getHdrFtr();
XmlCursor cursor = ctHdrFtr.newCursor();
cursor.selectPath("declare namespace w='http://schemas.openxmlformats.org/wordprocessingml/2006/main' .//*/w:r");
List<XmlObject> ctrInHdrFtr = new ArrayList<XmlObject>();
while (cursor.hasNextSelection()) {
cursor.toNextSelection();
XmlObject obj = cursor.getObject();
ctrInHdrFtr.add(obj);
}
return ctrInHdrFtr;
}
Now we have a list of all XML elements in that header which are text-run-elements in Word.
We could have a more general getAllCTRs which gets all CTR elements from any kind of IBody like so:
private List<XmlObject> getAllCTRs(IBody iBody) {
XmlCursor cursor = null;
List<XmlObject> ctrInIBody = new ArrayList<XmlObject>();
if (iBody instanceof XWPFHeaderFooter) {
XWPFHeaderFooter headerFooter = (XWPFHeaderFooter)iBody;
CTHdrFtr ctHdrFtr = headerFooter._getHdrFtr();
cursor = ctHdrFtr.newCursor();
} else if (iBody instanceof XWPFDocument) {
XWPFDocument document = (XWPFDocument)iBody;
CTDocument1 ctDocument1 = document.getDocument();
cursor = ctDocument1.newCursor();
} else if (iBody instanceof XWPFAbstractFootnoteEndnote) {
XWPFAbstractFootnoteEndnote footEndnote = (XWPFAbstractFootnoteEndnote)iBody;
CTFtnEdn ctFtnEdn = footEndnote.getCTFtnEdn();
cursor = ctFtnEdn.newCursor();
}
if (cursor != null) {
cursor.selectPath("declare namespace w='http://schemas.openxmlformats.org/wordprocessingml/2006/main' .//*/w:r");
while (cursor.hasNextSelection()) {
cursor.toNextSelection();
XmlObject obj = cursor.getObject();
ctrInIBody.add(obj);
}
}
return ctrInIBody ;
}
Now we have a list of all XML elements in that IBody which are text-run-elements in Word.
Having that we can get the text out of them like so:
private void printAllTextInTextRunsOfIBody(IBody iBody) throws Exception {
List<XmlObject> ctrInIBody = getAllCTRs(iBody);
for (XmlObject obj : ctrInIBody) {
CTR ctr = CTR.Factory.parse(obj.xmlText());
for (CTText ctText : ctr.getTList()) {
String text = ctText.getStringValue();
System.out.println(text);
}
}
}
This probably shows the next challenge. Because Word is very messy in creating text-run-elements. For example your placeholder <<Firstname>> can be split into text-runs << + Firstname + >>. The reason migt be different formatting or spell checking or something else. Even this is possible: << + Lastname + >>; << + YearOfBirth + >>. Or even this: <<Firstname + >> << + Lastname>>; << + YearOfBirth>>. You see, replacing the placeholders with text is nearly impossible because the placeholders may be split into multiple tex-runs.
To avoid this the template.dotx needs to be created from users who know what they are doing.
At first turn spell check off. Grammar check as well. If not, all found possible spell errors or grammar violations are in separate text-runs to mark them accordingly.
Second make sure the whole placeholder is eaqual formatted. Different formatted text also must be in separate text-runs.
I am really skeptic that this will work properly. But try it yourself.
Complete example:
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import org.apache.poi.xwpf.usermodel.*;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.*;
import org.apache.xmlbeans.XmlObject;
import org.apache.xmlbeans.XmlCursor;
import java.util.List;
import java.util.ArrayList;
public class WordEditAllIBodys {
private List<XmlObject> getAllCTRs(IBody iBody) {
XmlCursor cursor = null;
List<XmlObject> ctrInIBody = new ArrayList<XmlObject>();
if (iBody instanceof XWPFHeaderFooter) {
XWPFHeaderFooter headerFooter = (XWPFHeaderFooter)iBody;
CTHdrFtr ctHdrFtr = headerFooter._getHdrFtr();
cursor = ctHdrFtr.newCursor();
} else if (iBody instanceof XWPFDocument) {
XWPFDocument document = (XWPFDocument)iBody;
CTDocument1 ctDocument1 = document.getDocument();
cursor = ctDocument1.newCursor();
} else if (iBody instanceof XWPFAbstractFootnoteEndnote) {
XWPFAbstractFootnoteEndnote footEndnote = (XWPFAbstractFootnoteEndnote)iBody;
CTFtnEdn ctFtnEdn = footEndnote.getCTFtnEdn();
cursor = ctFtnEdn.newCursor();
}
if (cursor != null) {
cursor.selectPath("declare namespace w='http://schemas.openxmlformats.org/wordprocessingml/2006/main' .//*/w:r");
while (cursor.hasNextSelection()) {
cursor.toNextSelection();
XmlObject obj = cursor.getObject();
ctrInIBody.add(obj);
}
}
return ctrInIBody ;
}
private void printAllTextInTextRunsOfIBody(IBody iBody) throws Exception {
List<XmlObject> ctrInIBody = getAllCTRs(iBody);
for (XmlObject obj : ctrInIBody) {
CTR ctr = CTR.Factory.parse(obj.xmlText());
for (CTText ctText : ctr.getTList()) {
String text = ctText.getStringValue();
System.out.println(text);
}
}
}
private void replaceTextInTextRunsOfIBody(IBody iBody, String placeHolder, String textValue) throws Exception {
List<XmlObject> ctrInIBody = getAllCTRs(iBody);
for (XmlObject obj : ctrInIBody) {
CTR ctr = CTR.Factory.parse(obj.xmlText());
for (CTText ctText : ctr.getTList()) {
String text = ctText.getStringValue();
if (text != null && text.contains(placeHolder)) {
text = text.replace(placeHolder, textValue);
ctText.setStringValue(text);
obj.set(ctr);
}
}
}
}
public void generateDocX() throws Exception {
FileOutputStream outputStream = new FileOutputStream(new File("./" + 1234 + "header.docx"));
//Get the template for generating the new docx file
File template = new File("./template.dotx");
XWPFDocument document = new XWPFDocument(new FileInputStream(template));
//traverse all headers
for (XWPFHeader header : document.getHeaderList()) {
printAllTextInTextRunsOfIBody(header);
replaceTextInTextRunsOfIBody(header, "<<Firstname>>", "Axel");
replaceTextInTextRunsOfIBody(header, "<<Lastname>>", "Richter");
replaceTextInTextRunsOfIBody(header, "<<ProfessionalTitle>>", "Skeptic");
}
//traverse all footers
for (XWPFFooter footer : document.getFooterList()) {
printAllTextInTextRunsOfIBody(footer);
replaceTextInTextRunsOfIBody(footer, "<<Firstname>>", "Axel");
replaceTextInTextRunsOfIBody(footer, "<<Lastname>>", "Richter");
replaceTextInTextRunsOfIBody(footer, "<<ProfessionalTitle>>", "Skeptic");
}
//traverse document body; note: tables needs not be traversed separately because they are in document body
printAllTextInTextRunsOfIBody(document);
replaceTextInTextRunsOfIBody(document, "<<Firstname>>", "Axel");
replaceTextInTextRunsOfIBody(document, "<<Lastname>>", "Richter");
replaceTextInTextRunsOfIBody(document, "<<ProfessionalTitle>>", "Skeptic");
//traverse all footnotes
for (XWPFFootnote footnote : document.getFootnotes()) {
printAllTextInTextRunsOfIBody(footnote);
replaceTextInTextRunsOfIBody(footnote, "<<Firstname>>", "Axel");
replaceTextInTextRunsOfIBody(footnote, "<<Lastname>>", "Richter");
replaceTextInTextRunsOfIBody(footnote, "<<ProfessionalTitle>>", "Skeptic");
}
//traverse all endnotes
for (XWPFEndnote endnote : document.getEndnotes()) {
printAllTextInTextRunsOfIBody(endnote);
replaceTextInTextRunsOfIBody(endnote, "<<Firstname>>", "Axel");
replaceTextInTextRunsOfIBody(endnote, "<<Lastname>>", "Richter");
replaceTextInTextRunsOfIBody(endnote, "<<ProfessionalTitle>>", "Skeptic");
}
//since document was opened from *.dotx the content type needs to be changed
document.getPackage().replaceContentType(
"application/vnd.openxmlformats-officedocument.wordprocessingml.template.main+xml",
"application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml");
//Write the changes to the new docx file and close the document
document.write(outputStream);
outputStream.close();
document.close();
}
public static void main(String[] args) throws Exception {
WordEditAllIBodys app = new WordEditAllIBodys();
app.generateDocX();
}
}
Btw.: Since your document was opened from *.dotx the content type needs to be changed from wordprocessingml.template to wordprocessingml.document. Else Word will not open the resulting *.docx document. See Converting a file with ".dotx" extension (template) to "docx" (Word File).
As I am skeptic about the replacing-placeholder-text-approach, my preferred way is filling forms. See Problem with processing word document java. Of course such form fields cannot be used in header or footer. So headers or footers schould be created form scratch at whole.

merge multiple pdfs in order

hey guys sorry for long post and bad language and if there is unnecessary details
i created multiple 1page pdfs from one pdf template using excel document
i have now
something like this
tempfile0.pdf
tempfile1.pdf
tempfile2.pdf
...
im trying to merge all files in one single pdf using itext5
but it semmes that the pages in the resulted pdf are not in the order i wanted
per exemple
tempfile0.pdf in the first page
tempfile1. int the 2000 page
here is the code im using.
the procedure im using is:
1 filling a from from a hashmap
2 saving the filled form as one pdf
3 merging all the files in one single pdf
public void fillPdfitext(int debut,int fin) throws IOException, DocumentException {
for (int i =debut; i < fin; i++) {
HashMap<String, String> currentData = dataextracted[i];
// textArea.appendText("\n"+pdfoutputname +" en cours de preparation\n ");
PdfReader reader = new PdfReader(this.sourcePdfTemplateFile.toURI().getPath());
String outputfolder = this.destinationOutputFolder.toURI().getPath();
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(outputfolder+"\\"+"tempcontrat"+debut+"-" +i+ "_.pdf"));
// get the document catalog
AcroFields acroForm = stamper.getAcroFields();
// as there might not be an AcroForm entry a null check is necessary
if (acroForm != null) {
for (String key : currentData.keySet()) {
try {
String fieldvalue=currentData.get(key);
if (key=="ADRESSE1"){
fieldvalue = currentData.get("ADRESSE1")+" "+currentData.get("ADRESSE2") ;
acroForm.setField("ADRESSE", fieldvalue);
}
if (key == "IMEI"){
acroForm.setField("NUM_SERIE_PACK", fieldvalue);
}
acroForm.setField(key, fieldvalue);
// textArea.appendText(key + ": "+fieldvalue+"\t\t");
} catch (Exception e) {
// e.printStackTrace();
}
}
stamper.setFormFlattening(true);
}
stamper.close();
}
}
this is the code for merging
public void Merge() throws IOException, DocumentException
{
File[] documentPaths = Main.objetapp.destinationOutputFolder.listFiles((dir, name) -> name.matches( "tempcontrat.*\\.pdf" ));
Arrays.sort(documentPaths, NameFileComparator.NAME_INSENSITIVE_COMPARATOR);
byte[] mergedDocument;
try (ByteArrayOutputStream memoryStream = new ByteArrayOutputStream())
{
Document document = new Document();
PdfSmartCopy pdfSmartCopy = new PdfSmartCopy(document, memoryStream);
document.open();
for (File docPath : documentPaths)
{
PdfReader reader = new PdfReader(docPath.toURI().getPath());
try
{
reader.consolidateNamedDestinations();
PdfImportedPage pdfImportedPage = pdfSmartCopy.getImportedPage(reader, 1);
pdfSmartCopy.addPage(pdfImportedPage);
}
finally
{
pdfSmartCopy.freeReader(reader);
reader.close();
}
}
document.close();
mergedDocument = memoryStream.toByteArray();
}
FileOutputStream stream = new FileOutputStream(this.destinationOutputFolder.toURI().getPath()+"\\"+
this.sourceDataFile.getName().replaceFirst("[.][^.]+$", "")+".pdf");
try {
stream.write(mergedDocument);
} finally {
stream.close();
}
documentPaths=null;
Runtime r = Runtime.getRuntime();
r.gc();
}
my question is how to keep the order of the files the same in the resulting pdf

It is because of naming of files. Your code
new FileOutputStream(outputfolder + "\\" + "tempcontrat" + debut + "-" + i + "_.pdf")
will produce:
tempcontrat0-0_.pdf
tempcontrat0-1_.pdf
...
tempcontrat0-10_.pdf
tempcontrat0-11_.pdf
...
tempcontrat0-1000_.pdf
Where tempcontrat0-1000_.pdf will be placed before tempcontrat0-11_.pdf, because you are sorting it alphabetically before merge.
It will be better to left pad file number with 0 character using leftPad() method of org.apache.commons.lang.StringUtils or java.text.DecimalFormat and have it like this tempcontrat0-000000.pdf, tempcontrat0-000001.pdf, ... tempcontrat0-9999999.pdf.
And you can also do it much simpler and skip writing into file and then reading from file steps and merge documents right after the form fill and it will be faster. But it depends how many and how big documents you are merging and how much memory do you have.
So you can save the filled document into ByteArrayOutputStream and after stamper.close() create new PdfReader for bytes from that stream and call pdfSmartCopy.getImportedPage() for that reader. In short cut it can look like:
// initialize
PdfSmartCopy pdfSmartCopy = new PdfSmartCopy(document, memoryStream);
for (int i = debut; i < fin; i++) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
// fill in the form here
stamper.close();
PdfReader reader = new PdfReader(out.toByteArray());
reader.consolidateNamedDestinations();
PdfImportedPage pdfImportedPage = pdfSmartCopy.getImportedPage(reader, 1);
pdfSmartCopy.addPage(pdfImportedPage);
// other actions ...
}

Apache POI Table of contents not updating

I am using Apache POI XWPF components and java, to extract data from a .xml file into a word document. So far so good, but I am struggling to create a table of contents.
I have to create a table of contents at the start of the method and then I update it at the end to get all the new headers. Currently I use doc.createTOC(), where doc is a variable created from XWPFDocument, to create the table at the start and then I use doc.enforceUpdateFields() to update everything at the end of the document. But when I open the document after I ran the program, the table of contents is empty, but the navigation panel does include some of the headers I specified.
A comment recommended that I include some code. So i started off by create the document from a template:
XWPFDocument doc = new XWPFDocument(new FileInputStream("D://Template.docx"));
I then create a table of contents:
doc.createTOC();
Then throughout the method I add headers to the document:
XWPFParagraph documentControlHeading = doc.createParagraph();
documentControlHeading.setPageBreak(true);
documentControlHeading.setAlignment(ParagraphAlignment.LEFT);
documentControlHeading.setStyle("Tier1Header");
After all the headers are added, I want to update the document so that all the new headers will appear in the table of contents. I do this buy using the following command:
doc.enforceUpdateFields();

Hmmm... I am looking at the createTOC() method code, and it appears that it looks for styles that look like Heading #. So Tier1Header would not be found. Try creating your text first, and use styles like Heading 1 for your headings. Then add the TOC using createTOC(). It should find all the headings when the TOC is created. I do not know if enforceUpdateFields() affects the TOC.

//Your docx template should contain the following or something similar text //which will be searched for and replaced with a WORD TOC.
//${TOC}
public static void main(String[] args) throws IOException, OpenXML4JException {
XWPFDocument docTemplate = null;
try {
File file = new File(PATH_TO_FILE); //"C:\\Reports\\Template.docx";
FileInputStream fis = new FileInputStream(file);
docTemplate = new XWPFDocument(fis);
generateTOC(docTemplate);
saveDocument(docTemplate);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (docTemplate != null) {
docTemplate.close();
}
}
}
private static void saveDocument(XWPFDocument docTemplate) throws FileNotFoundException, IOException {
FileOutputStream outputFile = null;
try {
outputFile = new FileOutputStream(OUTFILENAME);
docTemplate.write(outputFile);
} finally {
if (outputFile != null) {
outputFile.close();
}
}
}
public static void generateTOC(XWPFDocument document) throws InvalidFormatException, FileNotFoundException, IOException {
String findText = "${TOC}";
String replaceText = "";
for (XWPFParagraph p : document.getParagraphs()) {
for (XWPFRun r : p.getRuns()) {
int pos = r.getTextPosition();
String text = r.getText(pos);
if (text != null && text.contains(findText)) {
text = text.replace(findText, replaceText);
r.setText(text, 0);
addField(p, "TOC \\o \"1-3\" \\h \\z \\u");
break;
}
}
}
}
private static void addField(XWPFParagraph paragraph, String fieldName) {
CTSimpleField ctSimpleField = paragraph.getCTP().addNewFldSimple();
// ctSimpleField.setInstr(fieldName + " \\* MERGEFORMAT ");
ctSimpleField.setInstr(fieldName);
ctSimpleField.addNewR().addNewT().setStringValue("<<fieldName>>");
}

This is the code of createTOC(), obtained by inspecting XWPFDocument.class:
public void createTOC() {
CTSdtBlock block = getDocument().getBody().addNewSdt();
TOC toc = new TOC(block);
for (XWPFParagraph par : this.paragraphs) {
String parStyle = par.getStyle();
if ((parStyle != null) && (parStyle.startsWith("Heading"))) try {
int level = Integer.valueOf(parStyle.substring("Heading".length())).intValue();
toc.addRow(level, par.getText(), 1, "112723803");
} catch (NumberFormatException e) {
e.printStackTrace();
}
}
}
As you can see, it adds to the TOC all paragraphs having styles named "HeadingX", with X being a number. But, unfortunately, that's not sufficent. The method, in fact, is bugged/uncomplete in its implementation.
The page number passed to addRow() is always 1, it's not even calculated.
So, at the end, you will have a TOC with all your paragraphs and the trailing dots giving the proper indentation, but the pages will be always equal to "1".
EDIT
...but, there's a solution here.

How to Convert splitted pdf to Excel file using java pdfbox

Im new to this PDFBOX. I hve one pdf file, which contain 60 pages. Im using Apache PDFBox-app-1.8.10. jar splitting up the PDF files.
public class SplitDemo {
public static void main(String[] args) throws IOException {
JButton open = new JButton();
JFileChooser fc = new JFileChooser();
fc.setCurrentDirectory(new java.io.File("C:/Users"));
fc.setDialogTitle("Select PDF");
if(fc.showOpenDialog(open)== JFileChooser.APPROVE_OPTION)
{
}
String a = null;
a = fc.getSelectedFile().getAbsolutePath();
PDDocument document = new PDDocument();
document = PDDocument.load(a);
// Create a Splitter object
Splitter splitter = new Splitter();
// We need this as split method returns a list
List<PDDocument> listOfSplitPages;
// We are receiving the split pages as a list of PDFs
listOfSplitPages = splitter.split(document);
// We need an iterator to iterate through them
Iterator<PDDocument> iterator = listOfSplitPages.listIterator();
// I am using variable i to denote page numbers.
int i = 1;
while(iterator.hasNext()){
PDDocument pd = iterator.next();
try{
// Saving each page with its assumed page no.
pd.save("G://PDFCopy/Page " + i++ + ".pdf");
} catch (COSVisitorException anException){
// Something went wrong with a PDF object
System.out.println("Something went wrong with page " + (i-1) + "\n Here is the error message" + anException);
}
}
}
}
**In PDFCopy Folder i hve list of pdf files. How can I convert all pdf to excel format and need to save it in the target folder. i am fully confused in this conversion. **