Generate a QR Code Image in Java

2 min readDec 16, 2020

QR codes have become a staple of modern operations, particularly in the era of the coronavirus pandemic. While they have always been used for sharing complex information, they are now being co-opted for new means like providing customers with links to menus or other traditionally hard-copy documents. Doing this helps prevent high-touch items and improve ease of access to information. The following API will allow you to generate a QR Code image in Java, instantly.

To install with Maven, add a reference to the repository in pom.xml:

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

And add a reference to the dependency in pom.xml:

<dependencies>
<dependency>
    <groupId>com.github.Cloudmersive</groupId>
    <artifactId>Cloudmersive.APIClient.Java</artifactId>
    <version>v3.54</version>
</dependency>
</dependencies>

To install with Gradle, add it in your root build.gradle at the end of repositories:

allprojects {
 repositories {
  ...
  maven { url 'https://jitpack.io' }
 }
}

And add the dependency in build.gradle:

dependencies {
        implementation 'com.github.Cloudmersive:Cloudmersive.APIClient.Java:v3.54'
}

Then, call the function:

// Import classes:
//import com.cloudmersive.client.invoker.ApiClient;
//import com.cloudmersive.client.invoker.ApiException;
//import com.cloudmersive.client.invoker.Configuration;
//import com.cloudmersive.client.invoker.auth.*;
//import com.cloudmersive.client.GenerateBarcodeApi;ApiClient defaultClient = Configuration.getDefaultApiClient();// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) defaultClient.getAuthentication("Apikey");
Apikey.setApiKey("YOUR API KEY");
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.setApiKeyPrefix("Token");GenerateBarcodeApi apiInstance = new GenerateBarcodeApi();
String value = "value_example"; // String | QR code text to convert into the QR code barcode
try {
    byte[] result = apiInstance.generateBarcodeQRCode(value);
    System.out.println(result);
} catch (ApiException e) {
    System.err.println("Exception when calling GenerateBarcodeApi#generateBarcodeQRCode");
    e.printStackTrace();
}

This will return a downloadable QR Code image containing your input information. You can retrieve the API Key from the Cloudmersive website at no cost and with no commitment. This will provide you with 800 monthly calls across our library of APIs.

Generate a QR Code Image in Java

Written by Cloudmersive