如何使用PayPal的SDK（Java或JavaScript）以两个或更少的步骤实现“允许订单完成”？

Question

我想实现这个功能：

贝宝结帐

允许分两个或更少的步骤完成订单

快速订单完成

我试过了：

1.1 设置交易

1.2 捕获交易资金

2.1 设置授权交易

2.2 创建授权

2.3获取授权

但是所有都是直接付款！

@Service
public class AuthorizationService {

    @Autowired
    private PayPalClient payPalClient;

    //2. Set up your server to receive a call from the client
    /**
     *Method to create order
     *
     *@param debug true = print response data
     *@return HttpResponse<Order> response received from API
     *@throws IOException Exceptions from API if any
     */
    public com.alibaba.fastjson.JSONObject createOrder(boolean debug) throws IOException {
        OrdersCreateRequest request = new OrdersCreateRequest();
        request.prefer("return=representation");
        request.requestBody(buildCreateOrderRequestBody());
        //3. Call PayPal to set up the transaction
        HttpResponse<Order> response = payPalClient.client().execute(request);
        if (debug) {
            if (response.statusCode() == 201) {
                System.out.println("Status Code: " + response.statusCode());
                System.out.println("Status: " + response.result().status());
                System.out.println("Order ID: " + response.result().id());
                System.out.println("Intent: " + response.result().intent());
                System.out.println("Links: ");
                for (LinkDescription link : response.result().links()) {
                    System.out.println("\t" + link.rel() + ": " + link.href() + "\tCall Type: " + link.method());
                }
                System.out.println("Total Amount: " + response.result().purchaseUnits().get(0).amount().currencyCode()
                        + " " + response.result().purchaseUnits().get(0).amount().value());
            }
        }

        Order order = response.result();
        JSONObject json = new JSONObject(new Json().serialize(order));
        com.alibaba.fastjson.JSONObject result = com.alibaba.fastjson.JSONObject.parseObject(json.toString(4));
        return result;
    }

    /**
     *Method to generate sample create order body with AUTHORIZE intent
     *
     *@return OrderRequest with created order request
     */
    private OrderRequest buildCreateOrderRequestBody() {
        OrderRequest orderRequest = new OrderRequest();
        orderRequest.intent("AUTHORIZE");

        ApplicationContext applicationContext = new ApplicationContext().brandName("EXAMPLE INC").landingPage("BILLING")
                .shippingPreference("SET_PROVIDED_ADDRESS");
        orderRequest.applicationContext(applicationContext);

        List<PurchaseUnitRequest> purchaseUnitRequests = new ArrayList<PurchaseUnitRequest>();
        PurchaseUnitRequest purchaseUnitRequest = new PurchaseUnitRequest().referenceId("PUHF")
                .description("Sporting Goods").customId("CUST-HighFashions").softDescriptor("HighFashions")
                .amount(new AmountWithBreakdown().currencyCode("USD").value("230.00")
                        .breakdown(new AmountBreakdown().itemTotal(new Money().currencyCode("USD").value("180.00"))
                                .shipping(new Money().currencyCode("USD").value("30.00"))
                                .handling(new Money().currencyCode("USD").value("10.00"))
                                .taxTotal(new Money().currencyCode("USD").value("20.00"))
                                .shippingDiscount(new Money().currencyCode("USD").value("10.00"))))
                .items(new ArrayList<Item>() {
                    {
                        add(new Item().name("T-shirt").description("Green XL").sku("sku01")
                                .unitAmount(new Money().currencyCode("USD").value("90.00"))
                                .tax(new Money().currencyCode("USD").value("10.00")).quantity("1")
                                .category("PHYSICAL_GOODS"));
                        add(new Item().name("Shoes").description("Running, Size 10.5").sku("sku02")
                                .unitAmount(new Money().currencyCode("USD").value("45.00"))
                                .tax(new Money().currencyCode("USD").value("5.00")).quantity("2")
                                .category("PHYSICAL_GOODS"));
                    }
                })
                .shipping(new ShippingDetails().name(new Name().fullName("John Doe"))
                        .addressPortable(new AddressPortable().addressLine1("123 Townsend St").addressLine2("Floor 6")
                                .adminArea2("San Francisco").adminArea1("CA").postalCode("94107").countryCode("US")));
        purchaseUnitRequests.add(purchaseUnitRequest);
        orderRequest.purchaseUnits(purchaseUnitRequests);
        return orderRequest;
    }

    //2. Set up your server to receive a call from the client
    /**
     *Method to authorize order after creation
     *
     *@param orderId Valid Approved Order ID from createOrder response
     *@param debug   true = print response data
     *@return HttpResponse<Order> response received from API
     *@throws IOException Exceptions from API if any
     */
    public com.alibaba.fastjson.JSONObject authorizeOrder(String orderId, boolean debug) throws IOException {
        OrdersAuthorizeRequest request = new OrdersAuthorizeRequest(orderId);
        request.requestBody(buildAuthorizeOrderRequestBody());
        // 3. Call PayPal to authorization an order
        HttpResponse<Order> response = payPalClient.client().execute(request);
        // 4. Save the authorization ID to your database. Implement logic to save the authorization to your database for future reference.
        if (debug) {
            System.out.println("Authorization Ids:");
            response.result().purchaseUnits()
                    .forEach(purchaseUnit -> purchaseUnit.payments()
                            .authorizations().stream()
                            .map(authorization -> authorization.id())
                            .forEach(System.out::println));
            System.out.println("Link Descriptions: ");
            for (LinkDescription link : response.result().links()) {
                System.out.println("\t" + link.rel() + ": " + link.href());
            }
            System.out.println("Full response body:");
            System.out.println(new JSONObject(new Json().serialize(response.result())).toString(4));
        }

        Order order = response.result();
        JSONObject json = new JSONObject(new Json().serialize(order));
        com.alibaba.fastjson.JSONObject result = com.alibaba.fastjson.JSONObject.parseObject(json.toString(4));
        return result;
    }

    /**
     *Building empty request body.
     *
     *@return OrderActionRequest with empty body
     */
    private OrderActionRequest buildAuthorizeOrderRequestBody() {
        return new OrderActionRequest();
    }

    //2. Set up your server to receive a call from the client
    /**
     * Method to patch order
     *
     * @throws IOException Exceptions from API, if any
     */
    public com.alibaba.fastjson.JSONObject patchOrder(String orderId) throws IOException {
        OrdersPatchRequest request = new OrdersPatchRequest(orderId);
        request.requestBody(buildRequestBody());
        payPalClient.client().execute(request);
        OrdersGetRequest getRequest = new OrdersGetRequest(orderId);
        //3. Call PayPal to patch the transaction
        HttpResponse<Order> response = payPalClient.client().execute(getRequest);
        System.out.println("After Patch:");
        System.out.println("Order ID: " + response.result().id());
        System.out.println("Intent: " + response.result().intent());
        System.out.println("Links: ");
        for (LinkDescription link : response.result().links()) {
            System.out.println("\t" + link.rel() + ": " + link.href() + "\tCall Type: " + link.method());
        }
        System.out.println("Gross Amount: " + response.result().purchaseUnits().get(0).amount().currencyCode() + " "
                + response.result().purchaseUnits().get(0).amount().value());
        System.out.println("Full response body:");
        System.out.println(new JSONObject(new Json().serialize(response.result())).toString(4));

        Order order = response.result();
        JSONObject json = new JSONObject(new Json().serialize(order));
        com.alibaba.fastjson.JSONObject result = com.alibaba.fastjson.JSONObject.parseObject(json.toString(4));
        return result;
    }

    /**
     * Method to create body for patching the order.
     *
     * @return List<Patch> list of patches to be made
     * @throws IOException
     */
    private List<Patch> buildRequestBody() throws IOException {
        List<Patch> patches = new ArrayList<>();
//        patches.add(new Patch().op("replace").path("/intent").value("CAPTURE"));
        patches.add(new Patch().op("replace").path("/purchase_units/@reference_id=='PUHF'/amount")
                .value(new AmountWithBreakdown().currencyCode("USD").value("250.00")
                        .breakdown(new AmountBreakdown().itemTotal(new Money().currencyCode("USD").value("180.00"))
                                .shipping(new Money().currencyCode("USD").value("50.00"))
                                .handling(new Money().currencyCode("USD").value("10.00"))
                                .taxTotal(new Money().currencyCode("USD").value("20.00"))
                                .shippingDiscount(new Money().currencyCode("USD").value("10.00")))));
        return patches;
    }

}

我想要：