Stripe payment gateway integration in Spring Boot

Stripe is a cloud-based service that provide us the service to receive payments over the internet. Stripe provides a layer of abstraction that reduces the complexity of receiving payments. As a result, we don't need to deal with credit card details directly – instead, we deal with a token symbolizing an authorization to charge. 

In this tutorial we will learn how we can configure stripe payment gateway into a spring boot project.

1. API Keys

First of all we need to create a stripe developer account which will provide us private and public API keys. we need to add these keys in application.properties file.

a .)  STRIPE_SECRET_KEY

b.)  STRIPE_PUBLIC_KEY

2. Maven Dependency

Then we need to add maven dependency. Search in the maven central repository for the latest version.

<dependency>

    <groupId>com.stripe</groupId>

    <artifactId>stripe-java</artifactId>

    <version>4.2.0</version>

</dependency>

3. Creating Entity

Create a POJO to get data from the client application. Here stripe token is a token which will be used to complete the payment. it will be provided by the client.

@Data

public class ChargeRequest {


    public enum Currency {

        EUR, USD;

    }


    private String description;

    private int amount;

    private Currency currency;

    private String stripeEmail;

    private String stripeToken;

}

4. Initialize Stripe

Create a service to initialize stripe. This will configure the stripe payment gateway with our stripe developer account by the secret key.

@Service

public class StripeService {

    @Value("${STRIPE_SECRET_KEY}")     private String secretKey;

 
    @PostConstruct

    public void init() {

        Stripe.apiKey = secretKey;

    }

}

5. Payment method 

Now we need to create a method which will complete the payment. Here we take data as charge request from the client and this method return a charge object provided by stripe form 'com.stripe.model.Charge'. In this method we are setting all the params in a charge params map. Charge.create() method processes the payment and returns a charge object having transactionId and payment status etc.

 public Charge charge(ChargeRequest chargeRequest) 

      throws AuthenticationException, InvalidRequestException,

        APIConnectionException, CardException, APIException {

        Map<String, Object> chargeParams = new HashMap<>();    
     
        chargeParams.put("amount", chargeRequest.getAmount());       
  
        chargeParams.put("currency", chargeRequest.getCurrency());         

        chargeParams.put("description", chargeRequest.getDescription());

        chargeParams.put("source", chargeRequest.getStripeToken());

        return Charge.create(chargeParams); 

}

6. Testing

In order to test Stripe payment gateway integration we can use testing token or card :

1. token => tok_visa

2. Card => Card No. = 4242 4242 4242 4242 

                   Expiry Date = any upcoming date

                   CVC = 123

This is how we can integrate and test Stripe payment gateway in spring boot application.