Specifying Custom Stream Provider for EPUB to XPS

In today’s digital age, the need to convert EPUB files to other formats, such as XPS, is more common than ever. Aspose.HTML for Java is a powerful tool that can help you achieve this effortlessly. In this step-by-step guide, we will explore how to convert an EPUB file to XPS using Aspose.HTML for Java. Before we dive into the specifics, let’s go over the prerequisites you’ll need for this process.

Prerequisites

To successfully convert EPUB to XPS, ensure you have the following prerequisites in place:

1. Aspose.HTML for Java Library

You must have the Aspose.HTML for Java library installed and configured in your Java environment. If you haven’t already, you can download the library from the download link.

2. Input EPUB File

You need an existing EPUB file that you want to convert to XPS. Ensure that you have this file ready for the conversion process.

Now that you have all the prerequisites in place, let’s proceed with the step-by-step guide on how to convert your EPUB file to XPS using Aspose.HTML for Java.

Import Packages

Before you begin, make sure to import the necessary packages for Aspose.HTML for Java to use its functionalities.

import com.aspose.html.converters.Converter;
import com.aspose.html.saving.XpsSaveOptions;
import com.aspose.html.saving.MemoryStreamProvider;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;

Open the EPUB File

First, you’ll need to open the existing EPUB file for reading. In this step, we’ll use a FileInputStream to access the EPUB file.

try (FileInputStream fileInputStream = new FileInputStream("path/to/your/input.epub")) {
    // Your code for Step 1
}

Create MemoryStreamProvider

Next, you should create an instance of MemoryStreamProvider. This will be used for the conversion process from EPUB to XPS.

try (MemoryStreamProvider streamProvider = new MemoryStreamProvider()) {
    // Your code for Step 2
}

Convert EPUB to XPS

Now, let’s convert the EPUB file to XPS using the Converter.convertEPUB method.

Converter.convertEPUB(
    fileInputStream,
    new XpsSaveOptions(),
    streamProvider.getStream().findFirst().get()
);

Get Resulted Data

After the conversion is complete, you can access the memory stream that contains the resulted XPS data.

InputStream inputStream = streamProvider.getStream().findFirst().get();

Save the Output

To complete the conversion, you should flush the result data to an output file. In this example, we save it as “output.xps.”

try (FileOutputStream fileOutputStream = new FileOutputStream("path/to/your/output.xps")) {
    byte[] buffer = new byte[inputStream.available()];
    inputStream.read(buffer);
    fileOutputStream.write(buffer);
}

With these five steps, you’ve successfully converted your EPUB file to XPS using Aspose.HTML for Java.

Complete Source Code

        // Open an existing EPUB file for reading.
        try (java.io.FileInputStream fileInputStream = new java.io.FileInputStream(Resources.input("input.epub"))) {
            // Create an instance of MemoryStreamProvider
            try (MemoryStreamProvider streamProvider = new MemoryStreamProvider()) {
                // Convert EPUB to XPS by using the MemoryStreamProvider
                com.aspose.html.converters.Converter.convertEPUB(
                        fileInputStream,
                        new com.aspose.html.saving.XpsSaveOptions(),
                        streamProvider.lStream
                );
                // Get access to the memory stream that contains the resulted data
                java.io.InputStream inputStream = streamProvider.lStream.stream().findFirst().get();
                // Flush the result data to the output file
                try (java.io.FileOutputStream fileOutputStream = new java.io.FileOutputStream(Resources.output("output.xps"))) {
                    byte[] buffer = new byte[inputStream.available()];
                    inputStream.read(buffer);
                    fileOutputStream.write(buffer);
                }
            }
        }

Conclusion

Converting EPUB to XPS is a valuable skill in today’s digital landscape. Aspose.HTML for Java simplifies the process, making it efficient and reliable. By following the steps outlined in this guide, you can easily achieve this conversion.

Now, let’s address some frequently asked questions to provide further clarity.

FAQs

1. What is EPUB?

EPUB, short for Electronic Publication, is a widely used file format for eBooks. It is designed to be easily readable on various devices, such as eReaders, tablets, and smartphones.

2. What is XPS?

XPS stands for XML Paper Specification, a document format created by Microsoft. It is used for sharing and archiving documents with a consistent appearance and layout.

3. Why use Aspose.HTML for Java?

Aspose.HTML for Java is a powerful library that simplifies document manipulation, conversion, and rendering tasks. It provides extensive features and support for various document formats, making it a valuable tool for developers.

4. Can I convert other document formats using Aspose.HTML for Java?

Yes, Aspose.HTML for Java supports the conversion of various document formats, including HTML, EPUB, XPS, and more. It’s a versatile tool for document management.

5. Where can I find additional resources and support?

For documentation and support, visit the Aspose.HTML for Java documentation and support forum.