Paypal与java集成

<dependency>
    <groupId>com.paypal.sdk</groupId>
    <artifactId>rest-api-sdk</artifactId>
    <version>1.14.0</version>
</dependency>

dependencies {
    implementation 'com.paypal.sdk:rest-api-sdk:1.14.0'
}

import com.paypal.base.rest.APIContext;
import com.paypal.base.rest.OAuthTokenCredential;
import com.paypal.base.rest.PayPalRESTException;

public class PayPalConfig {
    private static final String CLIENT_ID = "YOUR_CLIENT_ID";
    private static final String CLIENT_SECRET = "YOUR_CLIENT_SECRET";
    private static final String MODE = "sandbox"; // 或者 "live"

    public static APIContext getAPIContext() throws PayPalRESTException {
        OAuthTokenCredential tokenCredential = new OAuthTokenCredential(CLIENT_ID, CLIENT_SECRET, MODE);
        String accessToken = tokenCredential.getAccessToken();
        return new APIContext(accessToken, MODE);
    }
}

import com.paypal.api.payments.*;
import com.paypal.base.rest.PayPalRESTException;

import java.util.ArrayList;
import java.util.List;

public class PayPalPaymentExample {
    public static void main(String[] args) {
        try {
            APIContext apiContext = PayPalConfig.getAPIContext();

            // 创建支付对象
            Payment payment = new Payment();
            payment.setIntent("sale");

            // 创建付款详情
            Details details = new Details();
            details.setTotal("10.00");
            payment.setDetails(details);

            // 创建交易
            Transaction transaction = new Transaction();
            transaction.setDescription("Test Payment");
            transaction.setAmount(new Amount().currency("USD").total("10.00"));
            List<Transaction> transactions = new ArrayList<>();
            transactions.add(transaction);
            payment.setTransactions(transactions);

            // 创建支付链接
            Payer payer = new Payer();
            payer.setPaymentMethod("paypal");
            payment.setPayer(payer);

            // 创建重定向URL
            RedirectUrls redirectUrls = new RedirectUrls();
            redirectUrls.setReturnUrl("http://localhost:8080/success");
            redirectUrls.setCancelUrl("http://localhost:8080/cancel");
            payment.setRedirectUrls(redirectUrls);

            // 创建支付
            Payment createdPayment = payment.create(apiContext);
            System.out.println("Payment created: " + createdPayment.getId());

            // 获取批准链接
            for (Links link : createdPayment.getLinks()) {
                if (link.getRel().equals("approval_url")) {
                    System.out.println("Approval URL: " + link.getHref());
                    break;
                }
            }
        } catch (PayPalRESTException e) {
            e.printStackTrace();
        }
    }
}

@GetMapping("/success")
public String success(HttpServletRequest request) {
    String paymentId = request.getParameter("paymentId");
    String payerId = request.getParameter("PayerID");

    try {
        APIContext apiContext = PayPalConfig.getAPIContext();
        Payment payment = new Payment();
        payment.setId(paymentId);

        PaymentExecution paymentExecution = new PaymentExecution();
        paymentExecution.setPayerId(payerId);

        Payment executedPayment = payment.execute(apiContext, paymentExecution);
        System.out.println("Payment executed: " + executedPayment.getState());
    } catch (PayPalRESTException e) {
        e.printStackTrace();
    }

    return "success";
}

@GetMapping("/cancel")
public String cancel() {
    return "cancel";
}