How do you integrate Spring Boot with PayPal API for payments?

Table of Contents

Introduction

Integrating PayPal with Spring Boot enables your application to process secure online payments. PayPal’s REST API simplifies payment management, including creating, executing, and refunding transactions. This guide explains how to set up and integrate the PayPal API in a Spring Boot application for seamless payment processing.

Steps to Integrate PayPal API with Spring Boot

1. Configure PayPal API Credentials

Obtain PayPal API Credentials

  1. Sign in to the PayPal Developer Dashboard.
  2. Create a new application in the "Sandbox" environment.
  3. Note the Client ID and Client Secret.

Add PayPal API Credentials in Spring Boot

Update the application.yml or application.properties file with your credentials:

2. Add Dependencies for PayPal SDK

Add the PayPal SDK dependency to your pom.xml:

3. Configure PayPal SDK in Spring Boot

Create a configuration class for PayPal:

4. Create Payment Services

Implement the service to handle PayPal payments:

Practical Example: Processing Payments

Scenario: Payment Creation and Execution

Payment Controller

Testing the Integration

  1. Run the application and navigate to /pay?amount=10.
  2. Follow the PayPal redirect link to approve the payment.
  3. After payment approval, PayPal redirects to /success with paymentId and PayerID.

Conclusion

Integrating Spring Boot with PayPal API simplifies handling payments within your application. By configuring the PayPal SDK, creating payment methods, and setting up routes for success and cancellation, you can build a robust payment system. This approach ensures seamless and secure transactions for your users.

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