Set Up Your Server

Install and configure

We provide an open-source JAR file to integrate with the Braintree gateway.

Download Java library

• Version: 2.85.0
• SHA256: 6128ad1c0403b2901d4a5cdc87a8a5600827cb6bc3d3b6d5c05db6c9cd739407

Or use Maven

Maven is a build manager for Java.

Edit the pom.xml for your project, and in dependencies add:

<dependency>
  <groupId>com.braintreepayments.gateway</groupId>
  <artifactId>braintree-java</artifactId>
  <version>2.85.0</version>
</dependency>

The Java Client Library is published to The Maven Central Repository, so no additional repositories are required.

In your code, configure the environment and API credentials:

private static BraintreeGateway gateway = new BraintreeGateway(
  Environment.SANDBOX,
  "your_merchant_id",
  "your_public_key",
  "your_private_key"
);

Generate a client token

Your server is responsible for generating a client token, which contains all authorization and configuration information your client needs to initialize the client SDK to communicate with Braintree. Including a customerId() when generating the client token lets returning customers select from previously used payment method options, improving user experience over multiple checkouts.

ClientTokenRequest clientTokenRequest = new ClientTokenRequest()
  .customerId(aCustomerId);
String clientToken = gateway.clientToken().generate(clientTokenRequest);

If the customer can't be found, it will return a validation error.

Set Up Your Client covers the client side of the exchange.

The following Java examples use the Spark framework.

Send a client token to your client

Here is an example of how your server would generate and expose a client token:

get(new Route("/client_token") {
  @Override
  public Object handle(Request request, Response response) {
    return gateway.clientToken().generate();
  }
});

How the token is used by the client may vary. In JavaScript integrations the client token is often included in the generated HTML/JS, while in mobile apps the client token must be requested. These methods are discussed in the client token setup section.

Receive a payment method nonce from your client

Once your client successfully obtains a customer payment method, it receives a payment_method_nonce representing customer payment authorization, which it then sends to your server.

Your server implementation is then responsible for receiving the payment_method_nonce and using it appropriately.

post(new Route("/checkout") {
  @Override
  public Object handle(Request request, Response response) {
    String nonceFromTheClient = request.queryParams("payment_method_nonce");
    // Use payment method nonce here
  }
});

Create a transaction

You can create a transaction using an amount and the nonceFromTheClient you received in the previous step:

TransactionRequest request = new TransactionRequest()
  .amount(new BigDecimal("10.00"))
  .paymentMethodNonce(nonceFromTheClient)
  .options()
    .submitForSettlement(true)
    .done();

Result<Transaction> result = gateway.transaction().sale(request);

The sale call returns a Transaction Result Object which contains the transaction and information about the request.

Test your integration

See our Testing page for values you can use for nonceFromTheClient in your sandbox account. These nonces can be passed as strings through server-side calls to generate payment methods in the desired state. To verify your integration, you can check in the sandbox Control Panel, where transactions will immediately appear on success.

Transition to production

At this point, you should be able to accept a payment method nonce and create a transaction in our sandbox. When you're ready to start charging real money, transition over to our production environment. We'll explain that process next.

Next Page: Go Live →