Merging spreadsheets is a routine requirement across business processes, application development, and data‑analysis projects. Imagine you have several Excel files sourced from different departments or teams and you must consolidate them into one cohesive document. Doing this manually—copy‑pasting row by row—not only wastes time but also introduces errors. In this tutorial, we’ll demonstrate how to merge multiple Excel spreadsheets efficiently using the Cloud Java document merger library.

Steps to Merge Excel Spreadsheets using Java REST API

1. Sign up and get your API credentials from the GroupDocs Cloud Dashboard
2. Download the GroupDocs.Merger Cloud Java SDK and create a Java project
3. Initialize the Configuration class to set up your API credentials
4. To merge Excel spreadsheets, instantiate a DocumentApi class object
5. Configure the source Excel files using FileInfo and JoinItem
6. Apply the joining options, such as the output file with JoinOptions
7. Process the request to join two Excel spreadsheets

Using the Cloud API to combine Excel workbooks in Java significantly reduces the complexity of traditional methods. Developers can automate the spreadsheet merging process, making it faster, more reliable, and scalable. You will experience reduced code complexity, as it only takes calling a few API functions rather than writing complex scripts to join your Excel files easily. The Java REST API is platform-independent, making it easy to integrate into any Java-based application.

Code to Merge Excel Spreadsheets using Java REST API

The cloud‑based REST API makes merging Excel sheets a breeze, streamlining data management in your Java applications. Whether you’re building a web, mobile, or desktop Excel‑merger solution, this approach cuts development time and resource usage while enhancing scalability. By reducing the risk of human error, developers can handle large data sets with confidence, avoiding costly mistakes down the line.

If you’re also dealing with Word documents, explore our step‑by‑step guide on how to Merge Word Documents using the Java REST API.