Office Open XML (also referred to as OOXML) is a zipped, XML-based format for Excel, Word and Presentation documents. Sometimes, you may need to convert an Excel file to Office Open XML in order to make it readable on various applications and platforms. Likewise, you might also want to convert Office Open XML to Excel for data calculations. In this article, you will learn how to Convert Excel to Office Open XML and vice versa in Java using Spire.XLS for Java library.

• Convert Excel to Office Open XML in Java
• Convert Office Open XML to Excel in Java

Install Spire.XLS for Java

First of all, you're required to add the Spire.Xls.jar file as a dependency in your Java program. The JAR file can be downloaded from this link. If you use Maven, you can easily import the JAR file in your application by adding the following code to your project's pom.xml file.

<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.xls</artifactId>
        <version>14.11.0</version>
    </dependency>
</dependencies>
    

Convert Excel to Office Open XML in Java

The following are the steps to convert an Excel file to Office Open XML:

• Create an instance of Workbook class.
• Load an Excel file using Workbook.loadFromFile() method.
• Call Workbook.saveAsXml() method to save the Excel file as Office Open XML.

import com.spire.xls.Workbook;

public class ExcelToOpenXML {
    public static void main(String []args){
        //Create a Workbook instance
        Workbook workbook = new Workbook();
        //Load an Excel file
        workbook.loadFromFile("Sample.xlsx");

        //Save as Office Open XML file format
        workbook.saveAsXml("ToXML.xml");
    }
}

Convert Office Open XML to Excel in Java

The following are the steps to convert an Office Open XML file to Excel:

• Create an instance of Workbook class.
• Load an Office Open XML file using Workbook.loadFromXml() file.
• Call Workbook.saveToFile() method to save the Office Open XML file as Excel.

import com.spire.xls.ExcelVersion;
import com.spire.xls.Workbook;

public class OpenXmlToExcel {
    public static void main(String []args){
        //Create an instance of Workbook class
        Workbook workbook = new Workbook();
        //Load an Office Open XML file
        workbook.loadFromXml("ToXML.xml");

        //Save as Excel XLSX file format
        workbook.saveToFile("ToExcel.xlsx", ExcelVersion.Version2016);
    }
}

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