SoFunction
Updated on 2025-04-28

Java implements two ways to convert Word documents into PDF with one click

Hey, friends! During development, you often encounter the need to convert Word documents into PDF format, such as generating reports, contracts, etc. There are many useful libraries in Java that can implement this function. Here are two common methods, using Apache POI and Docx4J combined with iText library to implement Word to PDF.

Method 1: Use Apache POI and iText

1. Introduce dependencies

If you use Maven to manage your project,Add the following dependencies:

<dependencies>
    <!-- Apache POI deal with Word document -->
    <dependency>
        <groupId></groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>5.2.3</version>
    </dependency>
    <!-- iText generate PDF document -->
    <dependency>
        <groupId></groupId>
        <artifactId>itextpdf</artifactId>
        <version>5.5.13.3</version>
    </dependency>
</dependencies>

2. Code example

import .*;
import ;
import ;
import ;
import ;

import .*;

public class WordToPdfWithPOI {
    public static void main(String[] args) {
        try {
            // Read Word documents            FileInputStream fis = new FileInputStream("");
            XWPFDocument document = new XWPFDocument(fis);

            // Create PDF document            Document pdfDoc = new Document();
            (pdfDoc, new FileOutputStream(""));
            ();

            // traverse paragraphs of Word document            for (XWPFParagraph paragraph : ()) {
                StringBuilder text = new StringBuilder();
                // traverse the text running object in the paragraph                for (XWPFRun run : ()) {
                    ((0));
                }
                // Add paragraph text to PDF document                Paragraph pdfParagraph = new Paragraph(());
                (pdfParagraph);
            }

            // Close documents and streams            ();
            ();
            ();

            ("Word to PDF successfully!");
        } catch (Exception e) {
            ();
            ("Word to PDF failed:" + ());
        }
    }
}

3. Code explanation

  • Read Word Documents:useFileInputStreamReadFiles, use them againXWPFDocumentThe class loads it into memory.

  • Create PDF documents: CreateDocumentObject representation PDF document, usePdfWriterAssociate the output stream, and then open the document and prepare to write content.

  • Traversing Word document paragraphs: traverse each paragraph of the Word document, extract the text in the paragraph, and add it toStringBuilder, create againParagraphObjects are added to PDF documents.

  • Close documents and streams: After the operation is completed, close the PDF document, Word document, and input stream.

Method 2: Use Docx4J

1. Introduce dependencies

existAdd the following dependencies:

<dependencies>
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-JAXB-Internal</artifactId>
        <version>11.4.9</version>
    </dependency>
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-JAXB-ReferenceImpl</artifactId>
        <version>11.4.9</version>
    </dependency>
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j</artifactId>
        <version>11.4.9</version>
    </dependency>
    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-export-fo</artifactId>
        <version>11.4.9</version>
    </dependency>
</dependencies>

2. Code example

import org.docx4j.Docx4J;
import org.;
import org.;

import ;
import ;
import ;

public class WordToPdfWithDocx4J {
    public static void main(String[] args) {
        try {
            // Load Word documents            WordprocessingMLPackage wordMLPackage = (new File(""));

            // Create FOSettings object            FOSettings foSettings = ();
            (wordMLPackage);

            // Create output stream            OutputStream os = new FileOutputStream(new File(""));

            // Convert and save as PDF            (foSettings, os, Docx4J.FLAG_EXPORT_PREFER_XSL);

            // Turn off the output stream            ();

            ("Word to PDF successfully!");
        } catch (Exception e) {
            ();
            ("Word to PDF failed:" + ());
        }
    }
}

3. Code explanation

  • Loading Word Documents:useMethod loadingdocument.

  • Create FOSettings object：FOSettingsUse to configure conversion settings and set the loaded Word document in.

  • Create an output stream: CreateFileOutputStreamUsed to output PDF files.

  • Convert and save as PDF: CallThe method performs conversion and saves the result to the output stream.

  • Turn off the output stream: After the operation is completed, close the output stream.

Hey, friends! Both methods can help you convert Word documents into PDFs in Java. You can choose the right method according to your needs and preferences. Try it now and make your program easy to convert documents!

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