Follow this hands‑on, step‑by‑step Java REST API QR code scanning tutorial to learn how to scan QR codes with a Java REST API. We’ll walk you through building a Java‑based QR scanner powered by the Aspose Cloud SDK, and show you how to target specific barcode or QR formats for fast recognition in any image.
Prerequisite
- Create an account and get API credentials for reading a QR code
- Download Aspose.BarCode Cloud SDK for Java to read multiple QR codes from an image
- Set up a Java project with the above SDK
Steps for QR Photo Scanner with Java REST API
- Add references to Aspose.BarCode.Cloud.Sdk.Api and Aspose.BarCode.Cloud.Sdk.Model to access API and model classes
- Create a Configuration object and set the API base URL, client ID, and client secret for authentication with Aspose.BarCode Cloud
- Specify the image file name and open it as a file stream to prepare it for recognition
- Create an instance of RecognizeApi using the configured Configuration object
- Call the RecognizeMultipartAsync method with DecodeBarcodeType.QR and the file stream to detect QR codes in the image
- Loop through the recognized barcodes in the response and display their values and types
These steps summarize the process to develop a QR code scanner app with Java Low Code API. First, set up the environment by adding Aspose.BarCode.Cloud.Sdk.Api and Aspose.BarCode.Cloud.Sdk.Model, create a Configuration object with your credentials, and load the image file (MultipleQRCodes.png) into a FileStream. Then, use the RecognizeApi class to call RecognizeMultipartAsync, and loop through the results to display each QR code’s BarcodeValue and Type.
Code to Read QR Code with Java REST Interface
The example above demonstrates how to scan a QR code from an image using the Java REST API. By setting DecodeBarcodeType to QR, you instruct the service to look exclusively for QR codes, which speeds up processing, enhances reliability, and eliminates unwanted barcode detections.
In this concise tutorial we explored how to build a QR‑code reader with a Java REST API. Ready to broaden your scanning toolkit? Check out our next guide on Scan Barcode with Java REST API.
