Converting Word documents (doc or .docx) to PDF is a common requirement in many Java-based applications, especially those involving documentation, report generation, or digital archiving. In this tutorial, we'll show you how to convert Word to PDF in Java using reliable and easy-to-implement libraries like Spire.Doc for Java. This guide will walk you through all the code examples from code library integration to converting Word files to PDF format seamlessly.
After reading this guide, you will learn:
- Specific Steps of How to Convert Doc/Docx Files to PDF Format with Spire.Doc for Java
- Advanced Settings When Converting Word Files to PDF
- How to Adjust Word Files When Converting Word to PDF with Java Code
Let's dive into the Java code for Word to PDF conversion and help your application automate document processing with just a few lines of code.
Specific Steps of How to Convert Doc/Docx Files to PDF Format with Spire.Doc for Java
Before going through the sample code, you should know one of the best Word Java library known as Spire.Doc for Java. It supports not only Word file format conversion, but more advanced settings including page size adjustment, font embed, specific area conversion, etc. It is a one time download for long-term benefits.
Follow the steps below to learn how you can convert Word files to PDF format with Spire.Doc for Java.
Step 1. Install Spire.Doc for Java
Before converting, you should add the Spire.Doc.jar file as a dependency in your Java program. You can download the JAR file from the official download page.
If you are using Maven, you can easily import the JAR file in your application by adding the following code to your project's pom.xml file directly:
<repositories>
<repository>
<id>com.e-iceblue</id>
<name>e-iceblue</name>
<url>https://repo.e-iceblue.com/nexus/content/groups/public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>e-iceblue</groupId>
<artifactId>spire.doc</artifactId>
<version>13.7.2</version>
</dependency>
</dependencies>
Step 2. Convert Word to PDF with Java Code
After library integration, now, it's time to convert your Word files. Copy the code below to your Java program:
import com.spire.doc.Document;
import com.spire.doc.FileFormat;
public class ConvertWordToPdf {
public static void main(String[] args) {
// Create a Document object
Document doc = new Document();
// Load a Word document
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Input.docx");
// Save the document to PDF
doc.saveToFile("ToPDF.pdf", FileFormat.PDF);
// Dispose resources
doc.dispose();
}
}
RESULT:
Advanced Settings When Converting Word Files to PDF
Except for simply converting Word to PDF files, Spire.Doc for Java provides more options beyond simply conversion. For example, you can set a password to protect your PDF data with simple code during the conversion. You have no need to look for other tutorials. The following list is a preview of these settings, and you can directly jump to the corresponding part.
- Convert Word files to PDF/A Format with Java Code
- Convert Word Files to Password-Protected PDF in Java
- Convert a Specific Area in Word to PDF in Java
Convert Word files to PDF/A Format with Java Code
Spire.Doc for Java allows you to set the conformance level as Pdf/A-1a. To apply these customized settings, pass the ToPdfParameterList object as a parameter to the Document.saveToFile() method.
Copy the code below to convert your doc/docx to PDF/A files with Java:
import com.spire.doc.Document;
import com.spire.doc.ToPdfParameterList;
import com.spire.doc.PdfConformanceLevel;
public class ConvertWordToPdfa {
public static void main(String[] args) {
// Create a Document object
Document doc = new Document();
// Load a Word document
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\input.docx");
// Create a ToPdfParameterList object
ToPdfParameterList parameters = new ToPdfParameterList();
// Set the conformance level for PDF
parameters.setPdfConformanceLevel(PdfConformanceLevel.Pdf_A_1_A);
// Save the document to a PDF file
doc.saveToFile("C:\\Users\\Administrator\\Desktop\\ToPdfA.pdf", parameters);
// Dispose resources
doc.dispose();
}
}
Convert Word Files to Password-Protected PDF in Java
To protect your data, you may need to set a password for the converted PDF file. In this part, you can encrypt the converted PDF documents with password during the conversion process without any hassle. By passing the ToPdfParameterList object as a parameter to the Document.saveToFile() method, these encryption settings will be applied during the saving process.
Copy the code below to encrypt converted PDF files during conversion with Java:
import com.spire.doc.Document;
import com.spire.doc.PdfPermissionsFlags;
import com.spire.doc.ToPdfParameterList;
public class ConvertWordToPasswordProtectedPdf {
public static void main(String[] args) {
// Create a Document object
Document doc = new Document();
// Load a Word document
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Input.docx");
// Create a ToPdfParameterList object
ToPdfParameterList parameters = new ToPdfParameterList();
// Set open password and permission password for PDF
parameters.getPdfSecurity().encrypt("openPsd", PdfPermissionsFlags.valueOf("permissionPsd"));
// Save the document to PDF
doc.saveToFile("PasswordProtected.pdf", parameters);
// Dispose resources
doc.dispose();
}
}
Convert a Specific Area in Word to PDF in Java
The third section is that you can create a copy of a certain section with Spire.Doc's Section.deepClone() method and use the SectionCollection.add() method to add the copied section to the section collection of another document.
You can easily create a document containing the desired section from the source document with the following Java code:
import com.spire.doc.Document;
import com.spire.doc.FileFormat;
import com.spire.doc.Section;
public class ConvertSectionToPdf {
public static void main(String[] args) {
// Create a Document object
Document doc = new Document();
// Load a Word document
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Input.docx");
// Get a specific section of the document
Section section = doc.getSections().get(1);
// Create a new document object
Document newDoc = new Document();
// Clone the default style to the new document
doc.cloneDefaultStyleTo(newDoc);
// Clone the section to the new document
newDoc.getSections().add(section.deepClone());
// Save the new document to PDF
newDoc.saveToFile("SectionToPDF.pdf", FileFormat.PDF);
// Dispose resources
doc.dispose();
newDoc.dispose();
}
}
How to Adjust Word Files When Converting Word to PDF with Java Code
To get the best conversion result, you can make more adjustment to your Word documents during the conversion process. For example, you can embed fonts, adjust page size, set image quality, create bookmarks, or modify hyperlink with Java code.
Here, I will take one adjustment as an example to show you how to manage it. If you need to apply other adjustments, you can directly click the link above and jump to the corresponding page.
Example: Set Image Quality During Word to PDF Conversion
Image quality is a vital element when converting DOC/DOCX files to PDF format. It may influence the conversion speed and play an important role in the conversion result. With Spire.Doc for Java, you can set the image quality according to your specific needs to ensure the highest efficiency.
Copy the following code in your Java program to adjust picture quality:
import com.spire.doc.Document;
import com.spire.doc.FileFormat;
public class SetImageQualityDuringConversion {
public static void main(String[] args) {
// Create a Document object
Document doc = new Document();
// Load a Word document
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Input.docx");
// Set the image quality to 50% of the original quality
doc.setJPEGQuality(50);
// Preserve original image quality
// doc.setJPEGQuality(100);
// Save the document to PDF
doc.saveToFile("SetImageQuality.pdf", FileFormat.PDF);
// Dispose resources
doc.dispose();
}
}
Final Words
Converting Word to PDF in Java is simple and efficient with Spire.Doc for Java. From basic conversion to advanced options like password protection, section export, and image quality settings, you can handle it all with just a few lines of code.
If you'd like to access all features without limitations and remove the evaluation watermark, please request a 30-day trial license for yourself.
