Java用Stripe APIの紹介

@Controller
public class CheckoutController {

    @Value("${STRIPE__PUBLIC__KEY}")
    private String stripePublicKey;

    @RequestMapping("/checkout")
    public String checkout(Model model) {
        model.addAttribute("amount", 50 **  100);//in cents
        model.addAttribute("stripePublicKey", stripePublicKey);
        model.addAttribute("currency", ChargeRequest.Currency.EUR);
        return "checkout";
    }
}

<form action='/charge' method='POST' id='checkout-form'>
    <input type='hidden' th:value='${amount}' name='amount'/>
    <label>Price:<span th:text='${amount/100}'/></label>
    <!-- NOTE: data-key/data-amount/data-currency will be rendered by Thymeleaf -->
    <script
       src='https://checkout.stripe.com/checkout.js'
       class='stripe-button'
       th:attr='data-key=${stripePublicKey},
         data-amount=${amount},
         data-currency=${currency}'
       data-name='Baeldung'
       data-description='Spring course checkout'
       data-image
         ='http://www.baeldung.com/uploads/android-chrome-192x192.png'
       data-locale='auto'
       data-zip-code='false'>
   </script>
</form>

@Data
public class ChargeRequest {

    public enum Currency {
        EUR, USD;
    }
    private String description;
    private int amount;
    private Currency currency;
    private String stripeEmail;
    private String stripeToken;
}

@Service
public class StripeService {

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

    @PostConstruct
    public void init() {
        Stripe.apiKey = secretKey;
    }
    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);
    }
}

@Controller
public class ChargeController {

    @Autowired
    private StripeService paymentsService;

    @PostMapping("/charge")
    public String charge(ChargeRequest chargeRequest, Model model)
      throws StripeException {
        chargeRequest.setDescription("Example charge");
        chargeRequest.setCurrency(Currency.EUR);
        Charge charge = paymentsService.charge(chargeRequest);
        model.addAttribute("id", charge.getId());
        model.addAttribute("status", charge.getStatus());
        model.addAttribute("chargeId", charge.getId());
        model.addAttribute("balance__transaction", charge.getBalanceTransaction());
        return "result";
    }

    @ExceptionHandler(StripeException.class)
    public String handleError(Model model, StripeException ex) {
        model.addAttribute("error", ex.getMessage());
        return "result";
    }
}