Convert ZIP to 7Z in Java

Introduction

We will briefly go through how we can leverage Aspose.ZIP for Java to convert ZIP to 7Z in Java programmatically.

Java 7Z SDK Installation

This section takes you to the installation of this Java 7Z SDK.

Steps to Create 7Z File Programmatically

We will walk through the steps to automate the process of developing a 7Z file archiver.

Convert ZIP to 7Z in Java - Code Sample

Finally, we will write a complete code snippet using the classes and methods exposed by Aspose.ZIP for Java.

In our recent blog post, we implemented the functionality of converting RAR to ZIP in Java programmatically. However, in this guide, we will see how to convert ZIP to 7Z in Java. Aspose.ZIP for Java is a powerful library that provides a robust solution to convert a ZIP archive to a 7Z file extension. Further, you will find this library a go-to solution for building a 7Z file archiver for your business application.

Java 7Z SDK Installation

The installation process is not more than downloading this JAR file or using the following Maven configurations:

 <repositories>
     <repository>
         <id>snapshots</id>
         <name>repo</name>
         <url>http://repository.aspose.com/repo/</url>
     </repository>
</repositories>
 <dependencies>
    <dependency>
        <groupId>com.aspose</groupId>
        <artifactId>aspose-zip</artifactId>
        <version>24.5</version>
    </dependency>
</dependencies>

Steps to Create 7Z File Programmatically

The following steps are to develop a 7Z file archiver programmatically:

Initialize an instance of the Archive class with a source ZIP file.
Create an object of the SevenZipLZMA2CompressionSettings class.
Instantiate an instance of the SevenZipEntrySettings class with the object of the SevenZipLZMA2CompressionSettings class.
Create an object of the SevenZipArchive class and pass an instance of the SevenZipEntrySettings class.
Loop through the entries returned by the getEntries method.
Invoke the save method to save the 7Z file on the disk.