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Spring Boot demo

Build a Spring MVC invoice portal with embedded, modal, and hosted Checkout. The Java SDK creates the order on the server.

What you’ll build

  • Spring Boot 4 with Spring MVC, validation, and Thymeleaf
  • Builder-based order creation with the Inttegro Java SDK
  • Server-held credentials, idempotency, and safe errors
  • Thymeleaf views progressively enhanced with @inttegro/js

See the flow

The gallery shows one server-created order in each Checkout presentation. The Java SDK, API key, invoice, and amount remain on the server.

Spring Boot desktop embedded Checkout
Ledgerline Spring Boot invoice portal with Inttegro Checkout embedded next to the invoice details. Shown without a previously attached payment method.
Embedded. Checkout is presented beside the Thymeleaf invoice so the amount and service context stay visible. Shown without a previously attached payment method.
Spring Boot desktop modal Checkout
Ledgerline Spring Boot invoice portal dimmed behind an Inttegro Checkout modal. Shown with an attached payment method.
Modal. Payment occupies a focused layer while Ledgerline remains available underneath. Shown with an attached payment method.

Select any image to view it full screen.

Run the demo

Install Java 17 and Maven. Until Java SDK 5.0.0 reaches Maven Central, install it from this Commerce checkout first. The released README has the exact commands.

Key files

  1. CheckoutService.java creates the order and maps safe errors.
  2. CheckoutController.java handles validation and the JSON or 303 response.
  3. checkout-presentations.js presents Checkout in all three modes.

Before you ship

Store the invoice and Inttegro order IDs together. Verify payment before marking the invoice paid or releasing services.

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