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Add Watermark in Excel using Java REST API

This guide shows you how to add a watermark to an Excel workbook using the Java REST API. Follow the step‑by‑step instructions to automatically apply watermarks to Excel files via the Java REST Interface with the help of a Java‑based Cloud SDK, and explore the various customization options available for fine‑tuning your watermark.

Prerequisite

Steps to Insert Watermark in Excel using Java Low Code API

  1. Set the required clientId, clientSecret, and the base API URL to authenticate with Aspose.Cells Cloud
  2. Instantiate the CellsApi class using your API credentials and endpoint to access workbook-related operations
  3. Define the local Excel file name and upload it to Aspose Cloud storage using UploadFileRequest
  4. Create a TextWaterMarkerRequest object with the desired watermark text and the font size
  5. Send a PutWorkbookWaterMarkerRequest with the file name and watermark configuration to apply the watermark to the uploaded workbook
  6. Create a DownloadFileRequest for the same file and receive the modified file stream with the watermark applied
  7. Write the downloaded stream to a new file on the local machine using a file stream

These steps summarize how to add a watermark in Excel using Java REST Interface. The code authenticates with Aspose.Cells Cloud, uploads an Excel file, applies a text watermark using specified font settings, and then downloads the updated workbook. Finally, it saves the modified file locally as WatermarkedWorkbook.xlsx.

Code to Add Watermark to Excel Sheet using Java RESTful Service

The snippet above shows how to add a watermark to an Excel file via a Java RESTful service. By configuring the TextWaterMarkerRequest object—adjusting properties such as the watermark text, font size, color, and more—you can tailor the watermark to your needs. If you have several workbooks, simply upload each one and invoke PutWorkbookWaterMarker() again, passing the appropriate file name in a new PutWorkbookWaterMarkerRequest object for every document.

In this tutorial we demonstrated how to add a watermark to an Excel workbook using the Java REST API. If you also need to strip an image’s background from an Excel file, see the article Remove image background in Excel using Java REST API.

 

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