How to convert Word document to HTML in java

Java is a widely used programming language that can be used to perform various computing and data processing tasks by writing code. In Java we can convert Word document to HTML using different API implementations. In this article, we will focus on converting Word documents to HTML using Apache POI (Java API for reading and writing Microsoft Office files).

Introduction

When working with Word documents, converting them to HTML is a common need. This can make it easier to display and share documents on the web. There are many libraries in Java that help us achieve this task. One way is to use the Apache POI API.

Apache POI is an open source Java API that can be used to read and write Microsoft Office files. We can convert Word documents to HTML using its XWPF (Word Document Processor) class library.

Implementation

First, we need to add the following dependencies to the project:

<dependency>
   <groupId>org.apache.poi</groupId>
   <artifactId>poi-ooxml</artifactId>
   <version>4.1.2</version>
</dependency>

<dependency>
   <groupId>org.apache.poi</groupId>
   <artifactId>poi-ooxml-schemas</artifactId>
   <version>4.1.2</version>
</dependency>

<dependency>
   <groupId>org.apache.xmlbeans</groupId>
   <artifactId>xmlbeans</artifactId>
   <version>3.1.0</version>
</dependency>

Then, we will create a class named WordToHtmlConverter, which The class will have a convertToHtml method whose parameter is the path to the Word document. This method will use the POI API implementation to convert the Word document to HTML.

import java.io.*;
import org.apache.poi.xwpf.converter.core.*;
import org.apache.poi.xwpf.converter.xhtml.*;
import org.apache.poi.xwpf.usermodel.*;

public class WordToHtmlConverter {
    public void convertToHtml(String wordFilePath) {
        try {
            InputStream inputStream = new FileInputStream(new File(wordFilePath));
            IXWPFConverter<HTMLSettings> converter = XWPFConverter.getInstance();
            HTMLSettings htmlSettings = new HTMLSettings();
            OutputStream outputStream = new FileOutputStream(new File("output.html"));
            converter.convert(new XWPFDocument(inputStream), outputStream, htmlSettings);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

In this example, we first open the input stream of the Word document and then instantiate the IXWPPFonverter object. We also created the HTMLSettings class to serve as the configuration file for the transformation. Finally, we save the results to a file called "output.html".

When using this method, you simply pass the string of the full path to the Word document to the convertToHtml method, as shown below:

WordToHtmlConverter converter = new WordToHtmlConverter();
converter.convertToHtml("/path/to/my/document.docx");

Conclusion

In this article, we have demonstrated how to convert a Word document to HTML using Apache POI. Java provides several ways to convert Word documents, but using Apache POI is a very convenient and practical method. Consider using this method if you need to display and share your Word document on the web.

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