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how to convert html file to ppt using java spring boot project

I have Tried Aspose and GroupDocs but those are inbuit-'apis,generating only one slide and have water-mark for ppts. Can anyone helpme how to write code that converts Html file content to PowerPointPresentation
Tried Like this--
package com.example.demo.config;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
public class ConPptHtml {
public static void main(String[] args) throws Exception {
// The path to the documents directory.
String dataDir ="C:\\Downloads\\";
// Create Empty presentation instance
Presentation pres = new Presentation();
// Access the default first slide of presentation
ISlide slide = pres.getSlides().get_Item(0);
// Adding the AutoShape to accommodate the HTML content
IAutoShape ashape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 10, 10, (float) pres.getSlideSize().getSize().getWidth(), (float) pres.getSlideSize().getSize().getHeight());
ashape.getFillFormat().setFillType(FillType.NoFill);
// Adding text frame to the shape
ashape.addTextFrame("");
// Clearing all paragraphs in added text frame
ashape.getTextFrame().getParagraphs().clear();
// Loading the HTML file using InputStream
InputStream inputStream = new FileInputStream(dataDir + "sample.html");
Reader reader = new InputStreamReader(inputStream);
int data = reader.read();
String content = ReadFile(dataDir + "sample.html");
// Adding text from HTML stream reader in text frame
ashape.getTextFrame().getParagraphs().addFromHtml(content);
// Saving Presentation
pres.save(dataDir + "hppt.pptx", SaveFormat.Pptx);
}

How to read raw data, say only text, from a file(word document, excel) without format? [duplicate]

The strings I'm (programmatically) getting from MS Word files when using Apache POI are not the same text I can look at when I open the files with MS Word.
When using the following code:
File someFile = new File("some\\path\\MSWFile.doc");
InputStream inputStrm = new FileInputStream(someFile);
HWPFDocument wordDoc = new HWPFDocument(inputStrm);
System.out.println(wordDoc.getText());
the output is a single line with many 'invalid' characters (yes, the 'boxes'), and many unwanted strings, like "FORMTEXT", "HYPERLINK \l "_Toc##########"" ('#' being numeric digits), "PAGEREF _Toc########## \h 4", etc.
The following code "fixes" the single-line problem, but maintains all the invalid characters and unwanted text:
File someFile = new File("some\\path\\MSWFile.doc");
InputStream inputStrm = new FileInputStream(someFile);
WordExtractor wordExtractor = new WordExtractor(inputStrm);
for(String paragraph:wordExtractor.getParagraphText()){
System.out.println(paragraph);
}
I don't know if I'm using the wrong method for extracting the text, but that's what I've come up with when looking at POI's quick-guide. If I am, what is the correct approach?
If that output is correct, is there a standard way for getting rid of the unwanted text, or will I have to write a filter of my own?

This class can read both .doc and .docx files in Java. For this I'm using tika-app-1.2.jar:
/*
* This class is used to read .doc and .docx files
*
* #author Developer
*
*/
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.URL;
import org.apache.tika.detect.DefaultDetector;
import org.apache.tika.detect.Detector;
import org.apache.tika.io.TikaInputStream;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.AutoDetectParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.Parser;
import org.apache.tika.sax.BodyContentHandler;
import org.xml.sax.ContentHandler;
class TextExtractor {
private OutputStream outputstream;
private ParseContext context;
private Detector detector;
private Parser parser;
private Metadata metadata;
private String extractedText;
public TextExtractor() {
context = new ParseContext();
detector = new DefaultDetector();
parser = new AutoDetectParser(detector);
context.set(Parser.class, parser);
outputstream = new ByteArrayOutputStream();
metadata = new Metadata();
}
public void process(String filename) throws Exception {
URL url;
File file = new File(filename);
if (file.isFile()) {
url = file.toURI().toURL();
} else {
url = new URL(filename);
}
InputStream input = TikaInputStream.get(url, metadata);
ContentHandler handler = new BodyContentHandler(outputstream);
parser.parse(input, handler, metadata, context);
input.close();
}
public void getString() {
//Get the text into a String object
extractedText = outputstream.toString();
//Do whatever you want with this String object.
System.out.println(extractedText);
}
public static void main(String args[]) throws Exception {
if (args.length == 1) {
TextExtractor textExtractor = new TextExtractor();
textExtractor.process(args[0]);
textExtractor.getString();
} else {
throw new Exception();
}
}
}
To compile:
javac -cp ".:tika-app-1.2.jar" TextExtractor.java
To run:
java -cp ".:tika-app-1.2.jar" TextExtractor SomeWordDocument.doc

There are two options, one provided directly in Apache POI, the other via Apache Tika (which uses Apache POI internally).
The first option is to use WordExtractor, but wrap it in a call to stripFields(String) when calling it. That will remove the text based fields included in the text, things like HYPERLINK that you've seen. Your code would become:
NPOIFSFileSystem fs = new NPOIFSFileSytem(file);
WordExtractor extractor = new WordExtractor(fs.getRoot());
for(String rawText : extractor.getParagraphText()) {
String text = extractor.stripFields(rawText);
System.out.println(text);
}
The other option is to use Apache Tika. Tika provides text extraction, and metadata, for a wide variety of files, so the same code will work for .doc, .docx, .pdf and many others too. To get clean, plain text of your word document (you can also get XHTML if you'd rather), you'd do something like:
TikaConfig tika = TikaConfig.getDefaultConfig();
TikaInputStream stream = TikaInputStream.get(file);
ContentHandler handler = new BodyContentHandler();
Metadata metadata = new Metadata();
tika.getParser().parse(input, handler, metadata, new ParseContext());
String text = handler.toString();

Try this, works for me and is purely a POI solution. You will have to look for the HWPFDocument counterpart though. Make sure the document you are reading predates Word 97, else use XWPFDocument like I do.
InputStream inputstream = new FileInputStream(m_filepath);
//read the file
XWPFDocument adoc= new XWPFDocument(inputstream);
//and place it in a xwpf format
aString = new XWPFWordExtractor(adoc).getText();
//gets the full text
Now if you want certain parts you can use the getparagraphtext but dont use the text extractor, use it directly on the paragraph like this
for (XWPFParagraph p : adoc.getParagraphs())
{
System.out.println(p.getParagraphText());
}

Converting a pdf to word document using java

I've successfully converted JPEG to Pdf using Java, but don't know how to convert Pdf to Word using Java, the code for converting JPEG to Pdf is given below.
Can anyone tell me how to convert Pdf to Word (.doc/ .docx) using Java?
import java.io.FileOutputStream;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.text.Document;
public class JpegToPDF {
public static void main(String[] args) {
try {
Document convertJpgToPdf = new Document();
PdfWriter.getInstance(convertJpgToPdf, new FileOutputStream(
"c:\\java\\ConvertImagetoPDF.pdf"));
convertJpgToPdf.open();
Image convertJpg = Image.getInstance("c:\\java\\test.jpg");
convertJpgToPdf.add(convertJpg);
convertJpgToPdf.close();
System.out.println("Successfully Converted JPG to PDF in iText");
} catch (Exception i1) {
i1.printStackTrace();
}
}
}

In fact, you need two libraries. Both libraries are open source. The first one is iText, it is used to extract the text from a PDF file. The second one is POI, it is ued to create the word document.
The code is quite simple:
//Create the word document
XWPFDocument doc = new XWPFDocument();
// Open the pdf file
String pdf = "myfile.pdf";
PdfReader reader = new PdfReader(pdf);
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
// Read the PDF page by page
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
TextExtractionStrategy strategy = parser.processContent(i, new SimpleTextExtractionStrategy());
// Extract the text
String text=strategy.getResultantText();
// Create a new paragraph in the word document, adding the extracted text
XWPFParagraph p = doc.createParagraph();
XWPFRun run = p.createRun();
run.setText(text);
// Adding a page break
run.addBreak(BreakType.PAGE);
}
// Write the word document
FileOutputStream out = new FileOutputStream("myfile.docx");
doc.write(out);
// Close all open files
out.close();
reader.close();
Beware: With the used extraction strategy, you will lose all formatting. But you can fix this, by inserting your own, more complex extraction strategy.

You can use 7-pdf library
have a look at this it may help :
http://www.7-pdf.de/sites/default/files/guide/manuals/library/index.html
PS: itext has some issues when given file is non RGB image, try this out!!

Although it's far from being a pure Java solution OpenOffice/LibreOfffice allows one to connect to it through a TCP port; it's possible to use that to convert documents. If this looks like an acceptable solution, JODConverter can help you.

Java: How to extract the links to images in a HTML file using Jsoup library for Java

I have a HTML file that I want to read using Jsoup and export the results to an excel sheet. In that process, I want to extract the links(src) of all the images present in the HTML file.
Here's the code snippet that I have used to do the same:
File myhtml = new File("D:\\Projects\\Java\\report.html");
//get the string from the file myhtml
String str = getFileString(myhtml);
//getting the links to the images as in the html file
Document doc = Jsoup.parseBodyFragment(str);
Elements media = doc.select("[src]");
//System.out.println(media.size());
for(Element imageLink:media)
{
if(imageLink.tagName().equals("img"))
//storing the local link to image as global variable in imlink
P1.imlink = imageLink.attr("src").toString();
System.out.println(P1.imlink);
}
}
I have two images in the HTML file that I want the links for. However, the code that I have written shows the link to only the first image present in the file. Please help me finding out the error in my code!

Try this here:
File f = new File("D:\\Projects\\Java\\report.html");
Document doc = Jsoup.parse(f, null, ""); // set proper Charset (2nd param) and BaseUri (3rd param) here
Elements elements = doc.select("img[src]");
for( Element element : elements )
{
// Do something with your links here ...
System.out.println(element.attr("src"));
}
Btw. maybe your problem is the part where you store the link into a global variable. This is overwritten everytime you run through the loop. A better solution is storing the link into a List or leave the loop after first hit.

//Dom ex............
import org.w3c.tidy.*;
import java.io.*;
import java.net.*;
import org.w3c.dom.*;
import java.util.*;
public class demo
{
public static void main(String arg[])
{
try
{
InputStream input = new URL("http://www.southreels.com").openStream();
Document document = new Tidy().parseDOM(input, null);
NodeList imgs = document.getElementsByTagName("img");
List<String> srcs = new ArrayList<String>();
for (int i = 0; i < imgs.getLength(); i++) {
srcs.add(imgs.item(i).getAttributes().getNamedItem("src").getNodeValue());
}
int i=0;
for (String src: srcs) {
System.out.println(i+" "+src);
i++;
String file =System.getProperty("user.dir")+System.getProperty("file.separator");
URL server = new URL(src);
HttpURLConnection connection = (HttpURLConnection)server.openConnection();
InputStream is = connection.getInputStream();
OutputStream os = new FileOutputStream(file+"demo"+i+".jpg");
byte[] buffer = new byte[1024];
int byteReaded = is.read(buffer);
while(byteReaded != -1)
{
os.write(buffer,0,byteReaded);
byteReaded = is.read(buffer);
}
os.close();
}
}
catch(Exception e)
{
}
}
}

error in converting word document to pdf using iText

The below is the code that i used to convert a word document to pdf. After compiling the code, the PDF file is generated. But the file contains some junk characters along with the word document content. Please help me to know what modification should i do to get rid of the junk characters.
The code i used is:
import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
import java.io.File;
import java.io.FileOutputStream;
public class PdfConverter
{
private void createPdf(String inputFile, String outputFile)//, boolean isPictureFile)
{
Document pdfDocument = new Document();
String pdfFilePath = outputFile;
try
{
FileOutputStream fileOutputStream = new FileOutputStream(pdfFilePath);
PdfWriter writer = null;
writer = PdfWriter.getInstance(pdfDocument, fileOutputStream);
writer.open();
pdfDocument.open();
/*if (isPictureFile)
{
pdfDocument.add(com.lowagie.text.Image.getInstance(inputFile));
}
else
{ */
File file = new File(inputFile);
pdfDocument.add(new Paragraph(org.apache.commons.io.FileUtils.readFileToString(file)));
//}
pdfDocument.close();
writer.close();
System.out.println("PDF has been generted");
}
catch (Exception exception)
{
System.out.println("Document Exception!" + exception);
}
}
public static void main(String args[])
{
PdfConverter pdfConversion = new PdfConverter();
pdfConversion.createPdf("C:/test.doc", "C:/test.pdf");//, true);
}
}
Thanks for you help.

Only because you name your class PdfConverter you don't have one. All you do is reading the binary content as a String and writing this as one paragraph (and that's what you see). This approach will definitively not be successful. See https://stackoverflow.com/questions/437394 for a similar question.
If you are interested just in the content of your word document, you might want to give Apache POI - the Java API for Microsoft Documents a try to read your the document not at binary level but on a hight abstraction level. If your Word document has a simple (and I mean a really simple) structure you might get reasonable results.

To do this, you will have to read the doc file correctly and then use the read data to create the PDF file.
What you are doing right now is that you are reading data from doc file, which is having garbage values since you are not using proper API to read the data, and then storing the obtained garbage data in the PDF file. Hence the issue.