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Replacing text in XWPFParagraph without changing format of the docx file

I am developing font converter app which will convert Unicode font text to Krutidev/Shree Lipi (Marathi/Hindi) font text. In the original docx file there are formatted words (i.e. Color, Font, size of the text, Hyperlinks..etc. ).
I want to keep format of the final docx same as the original docx after converting words from Unicode to another font.
PFA.
Here is my Code
try {
fileInputStream = new FileInputStream("StartDoc.docx");
document = new XWPFDocument(fileInputStream);
XWPFWordExtractor extractor = new XWPFWordExtractor(document);
List<XWPFParagraph> paragraph = document.getParagraphs();
Converter data = new Converter() ;
for(XWPFParagraph p :document.getParagraphs())
{
for(XWPFRun r :p.getRuns())
{
String string2 = r.getText(0);
data.uniToShree(string2);
r.setText(string2,0);
}
}
//Write the Document in file system
FileOutputStream out = new FileOutputStream(new File("Output.docx");
document.write(out);
out.close();
System.out.println("Output.docx written successully");
}
catch (IOException e) {
System.out.println("We had an error while reading the Word Doc");
}

Thank you for ask-an-answer.
I have worked using POI some years ago, but over excel-workbooks, but still I’ll try to help you reach the root cause of your error.
The Java compiler is smart enough to suggest good debugging information in itself!
A good first step to disambiguate the error is to not overwrite the exception message provided to you via the compiler complain.
Try printing the results of e.getLocalizedMessage()or e.getMessage() and see what you get.
Getting the stack trace using printStackTrace method is also useful oftentimes to pinpoint where your error lies!
Share your findings from the above method calls to further help you help debug the issue.
[EDIT 1:]
So it seems, you are able to process the file just right with respect to the font conversion of the data, but you are not able to reconstruct the formatting of the original data in the converted data file.
(thus, "We had an error while reading the Word Doc", is a lie getting printed ;) )
Now, there are 2 elements to a Word document:
Content
Structure or Schema
You are able to convert the data as you are working only on the content of your respective doc files.
In order to be able to retain the formatting of the contents, your solution needs to be aware of the formatting of the doc files as well and take care of that.
MS Word which defined the doc files and their extension (.docx) follows a particular set of schemas that define the rules of formatting. These schemas are defined in Microsoft's XML Namespace packages[1].
You can obtain the XML(HTML) format of the doc-file you want quite easily (see steps in [1] or code in link [2]) and even apply different schemas or possibly your own schema definitions based on the definitions provided by MS's namespaces, either programmatically, for which you need to get versed with XML, XSL and XSLT concepts (w3schools[3] is a good starting point) but this method is no less complex than writing your own version of MS-Word; or using MS-Word's inbuilt tools as shown in [1].
[1]. https://www.microsoftpressstore.com/articles/article.aspx?p=2231769&seqNum=4#:~:text=During%20conversion%2C%20Word%20tags%20the,you%20can%20an%20HTML%20file.
[2]. https://svn.apache.org/repos/asf/poi/trunk/src/scratchpad/testcases/org/apache/poi/hwpf/converter/TestWordToHtmlConverter.java
[3]. https://www.w3schools.com/xml/
My answer provides you with a cursory overview of how to achieve what you want to, but depending on your inclination and time availability, you may want to use your discretion before you decide to head onto one path than the other.
Hope it helps!

Java - How to extract information from many XML files in a directory and export it to an excel file

I am trying to get information from many xml files in a directory.
How can I get specific information from each one and send it to an excel file, in java?
file 1.xml
file 2.xml
file 3.xml
*********
**file.csv** or .**xls** with the information of the 'n' files XML

there are several libraries on Java that can help you to do so.
For instance, for getting information from XML you can use dom4j and extract the specific information make use of the query language XPATH, supported by the library (examples). And to read all the XML files form a directory, Java 8 has an easy way of achieving that.
Files.list(Paths.get("/path/to/xml/files"))
.map(YourXMLParser::parse)
.forEach(XLSExporter::export);
where parse method would have the signature:
public MyDataBean parse(Path path) {
InputStream inputStream = Files.newInputStream(Path);
SAXBuilder saxBuilder = new SAXBuilder(inputStream);
... <-- Making use of SAX for instance and return the read data in a custom Bean (MyDataBean)
}
As Files.list() method return Stream you can take advantage of that to use map and forEach.
Once you have the information from each XML files to you can export to XLS using the most used library in Java for it: Apache POI
I hope it can help.

How to save file with custom file extension in java?

Dear brothers Hope you all right?
I'm designing a document program, however, rather to save file .text extension or using any other MS-Office API in java, i want to create my custom file format such as ".sad" extension so that this sort of file can only be read by my programs, how this can be possible?

Your requirement seems ambiguous. Are you looking to make a program that creates MS Office Word documents or plain text files with a custom file extension?
In the case of the former, you can't have a custom extension as MS Word documents, by definition, have a .doc / .docx extension.
However, if you are looking to create a program that produces text files then you can easily have a custom extension. Just look at this tutorial: How to create a file in Java

I already stated why this is a bad idea. Yet I have a solution for you (more like a how-not-to-do-it)
Take your plain text you want to save, convert it to bytes and apply this "highly enthusiastic encryption nobody will ever be able to break" on it:
string plainText = "yadayada";
bytes[] bytesFromText = toBytes(plainText);
bytes[] encrypted = new Array(sizeof(bytesFromText)*2);
for(int i = 0; i < sizeof(bytesFromText); i++){
if((i modulo 2) == 0){
encrypted.push(toByte(Math.random modulo 255));
}
encrypted.push(bytesFromText[i]);
}
I let it up to you to figure out why this is a bad idea and how to decrypt it. ;)

You can create file with any extension
For example,
File f = new File("confidential.sad");
Hope this will work for you :)

Working with custom files in Java
Here is the tutorial that will help you in getting the concept about how to create your own files with custom extension such as .doc or .sad with some information embedded in it and after saving the file you want to read that information form the file.
ZIP
Similar applications often use archives to store data. Consider MS-Word and its documents >with the .docx file extension. If you change the extension of any .docx file to .zip, you >will find that the document is actually a zip archive, with only a different extension.
https://www.ict.social/java/files/working-with-custom-files-in-java-zip-archive

I have published a library that saves files, and handles everything with one line of code only, you can find it here along with its documentation
Github repository
and the answer to your question is so easy
String path = FileSaver
.get()
.save(file,"file.custom");

IO Issue - Byte Array Image into XHTML(FlyingSaucer)

I have a solution that inserts strings into an XHTML document and prints the results as Reports. My employer has asked if we could pull images off their SQL database (stored as byte arrays) to insert into the Reports.
I am using FlyingSaucer as the XHTML interpreter and I've been using Java DOM to modify pre-stored reports that I have stored in the Report Generator's package.
The only solution I can think of at the moment is to construct the images, save them as a file, link the file in an img tag (or background-image) in a constructed report, print the report and then delete the file. This seems really sloppy and I imagine it will be very time consuming.
I can't help but feel there must be a more elegant solution. Any suggestions for inserting a byte array into html?

Read the image and convert it into it's Base64-encoded form:
InputStream image = getClass().getClassLoader().getResourceAsStream("image.png");
String encodedImage = BaseEncoding.base64().encode(ByteStreams.toByteArray(image));
I've used BaseEncoding and ByteStreams from Google Guava.
Change src attribute of img element within your Document object.
Document doc = ...; // get Document from XHTMLPanel.getDocument() or create
// new one using DocumentBuilderFactory
doc.getElementById("myImage").getAttributes().getNamedItem("src").setNodeValue("data:image/png;base64," + encodedImage);
Unfortunatley FlyingSaucer does not support DataURIs out-of-the-box so you'll have to create your own ReplacedElementFactory. Read Using Data URLs for embedding images in Flying Saucer generated PDFs article - it contains a complete solution.

How to create XML file?

I have some data which my program discovers after observing a few things about files.
For instance, i know file name, time file was last changed, whether file is binary or ascii text, file content (assuming it is properties) and some other stuff.
i would like to store this data in XML format.
How would you go about doing it?
Please provide example.

If you want something quick and relatively painless, use XStream, which lets you serialise Java Objects to and from XML. The tutorial contains some quick examples.

Use StAX; it's so much easier than SAX or DOM to write an XML file (DOM is probably the easiest to read an XML file but requires you to have the whole thing in memory), and is built into Java SE 6.
A good demo is found here on p.2:
OutputStream out = new FileOutputStream("data.xml");
XMLOutputFactory factory = XMLOutputFactory.newInstance();
XMLStreamWriter writer = factory.createXMLStreamWriter(out);
writer.writeStartDocument("ISO-8859-1", "1.0");
writer.writeStartElement("greeting");
writer.writeAttribute("id", "g1");
writer.writeCharacters("Hello StAX");
writer.writeEndDocument();
writer.flush();
writer.close();
out.close();

Standard are the W3C libraries.
final Document docToSave = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
final Element fileInfo = docToSave.createElement("fileInfo");
docToSave.appendChild(fileInfo);
final Element fileName = docToSave.createElement("fileName");
fileName.setNodeValue("filename.bin");
fileInfo.appendChild(fileName);
return docToSave;
XML is almost never the easiest thing to do.

You can use to do that SAX or DOM, review this link: https://web.archive.org/web/1/http://articles.techrepublic%2ecom%2ecom/5100-10878_11-1044810.html
I think is that you want