QrCode

Overview

Module

• package: org.eclipse.dirigible.sdk.utils
• source: utils/QrCode.java

Renders a QR-code PNG for the given payload. Backed by ZXing under the hood with the platform's default size and error-correction settings; ideal for embedding small URLs, codes, or connection strings in receipts, emails, and IDE perspectives.

Returns the raw PNG bytes — write them straight to an HTTP response (with Content-Type: image/png) or into a file via Files.writeBytesNative.

Key Features:

• ZXing-backed: Industry-standard QR-code generation with sensible defaults.
• PNG output: Returns raw PNG bytes ready to stream or persist.
• Single-call surface: No builder, no configuration object — just text in, bytes out.

Example Usage:

import org.eclipse.dirigible.sdk.utils.QrCode;
import jakarta.servlet.http.HttpServletResponse;

// Stream a QR code as an image response
byte[] png = QrCode.generate("https://www.dirigible.io");
response.setContentType("image/png");
response.getOutputStream().write(png);

// Or persist to disk
java.nio.file.Files.write(java.nio.file.Paths.get("/tmp/qr.png"), png);

Methods

generate()

Renders a QR-code PNG for the supplied payload string.

public static byte[] generate(String text) throws WriterException, IOException;

Parameter	Type	Description
text	String	The payload to encode in the QR code.

Returns

• Type: byte[]
• Description: The raw PNG bytes of the rendered QR code. Throws com.google.zxing.WriterException if the payload is too large for the default error-correction level, or java.io.IOException if PNG serialization fails.