完整版PayPal支付（java后端教程）

首先引入 PayPal的sdk 这里我引入的是1.0.4版本的

            <!-- 贝宝支付  SDK   --><dependency><groupId>com.paypal.sdk</groupId><artifactId>checkout-sdk</artifactId><paypal-sdk.version>1.0.4</paypal-sdk.version></dependency>

yml文件引入公司在官网的相关配置
这里我做了yml的文件环境隔离，限免的配置做了示例

  #  贝宝支付的测试服
pay:  paypal:clientId: AeEX1PNMNaP3RuV8JTBMznAhs_gOfFwloG6SG3TiQh1_MBj0clientSecret: EMDda7g_Q7KmOiH08qJfg-dAb8d2THkYtzRR#测试的modemode: sandbox#正式的modemode: live

/*** @since 2.0.0*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@ApiModel
public class PayPalVo extends RequestModel {/**  本站订单号 */@ApiModelProperty(value = "本站订单号")private String orderNo;/**  三方订单号 */@ApiModelProperty(value = "本站订单号")private String outOrderNo;/** 1 书币充值 ; 2 plus会员充值；3 premium会员充值 */@ApiModelProperty(value = "1 书币充值 ; 2 plus会员充值；3 premium会员充值")private Integer orderType;
}

PayPal支付
```java/*** 贝宝支付** @param payPalVo 请求对象* @return 返回结果*/@PostMapping("/payPalNotify")@ApiOperation(value = "贝宝支付二次验证")@Deprecatedpublic ResponseModel<PayOrderDto> payPalNotify(@RequestBody PayPalVo payPalVo){if (ObjectUtils.isEmpty(payPalVo.getOrderNo()) || ObjectUtils.isEmpty(payPalVo.getOutOrderNo()) || ObjectUtils.isEmpty(payPalVo.getOrderType())){return ResponseModel.error(appConfigStatusCodeService.getStatusCode(payPalVo.getLanguage(), ResponseCnSate.PARAM_EXCEPTION));}// 根据paypal的订单id，捕获订单付款String outOrderNo = payPalVo.getOutOrderNo();String orderNo = payPalVo.getOrderNo();Integer orderType = payPalVo.getOrderType();// 校验该订单是否处理if (payOrderService.isDispose(orderNo) == PayConstants.ORDER_IS_DISPOSE) {return ResponseModel.error(appConfigStatusCodeService.getStatusCode(payPalVo.getLanguage(), ResponseCnSate.ORDER_PROCESSED));}//进行二次验证Boolean pay = payPalUtils.verifyOrderInfo(outOrderNo);//如果成功则执行后面的逻辑if (pay){boolean b = orderService.finishOrder(orderNo, orderType,payPalVo.getLanguage());if (!b){return ResponseModel.error(appConfigStatusCodeService.getStatusCode(payPalVo.getLanguage(), ResponseCnSate.ORDER_HANDLER_FAIL));}//保存订单号返回订单信息PayOrderDto payOrderDto =orderService.saveAndGetOrderInfo(payPalVo.getUserId(),outOrderNo,orderNo);if (ObjectUtils.isNotEmpty(payOrderDto)){return ResponseModel.success(payOrderDto);}return ResponseModel.error(appConfigStatusCodeService.getStatusCode(payPalVo.getLanguage(), ResponseCnSate.RETURN_ORDER_INFO_FAIL));}//失败返回提示return ResponseModel.error(appConfigStatusCodeService.getStatusCode(payPalVo.getLanguage(), ResponseCnSate.AUTH_FAIL_TWO));}

后面为了让大家都看的明白我单独抽取了一个工具，简单的做了描述

package com.wyzz.global.untils.paypal;import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;import com.paypal.core.PayPalEnvironment;
import com.paypal.core.PayPalHttpClient;
import com.paypal.http.HttpResponse;
import com.paypal.http.serializer.Json;
import com.paypal.orders.*;
import com.paypal.payments.CapturesGetRequest;
import lombok.extern.slf4j.Slf4j;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import org.json.JSONObject;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;/*** PayPal工具类** @since 2.0.0*/
@Service
@Slf4j
public class PayPalUtils {/*** paypal配置应用的客户端ID*/@Value("${pay.paypal.clientId}")private String clientId;/*** paypal配置应用的客户端密钥*/@Value("${pay.paypal.clientSecret}")private String clientSecret;/*** paypal连接环境：live表示生产，sandbox表示沙盒*/@Value("${pay.paypal.mode}")private String mode;/*** paypal的http客户端* @param mode 环境信息* @param clientId 客户端ID* @param clientSecret 密钥* @return*/public PayPalHttpClient client(String mode, String clientId, String clientSecret) {log.info("mode={}, clientId={}, clientSecret={}", mode, clientId, clientSecret);PayPalEnvironment environment = mode.equals("live") ? new PayPalEnvironment.Live(clientId, clientSecret) : new PayPalEnvironment.Sandbox(clientId, clientSecret);return new PayPalHttpClient(environment);}/*** 构建订单请求体* @return*/public OrderRequest buildRequestBody() {return new OrderRequest();}/*** 校验订单信息：先扣款，后查询订单详情* @param orderId 前端提供的palpay的订单id* @return 订单存在并已扣款成功返回true*/public Boolean verifyOrderInfo(String orderId) {Boolean f = false;try {// 1.用户授权支付成功，进行扣款操作this.captureOrder(orderId);} catch (Exception e) {e.printStackTrace();} finally {// 2.扣款操作失败时也要查询订单，确认是否已扣款try {OrdersGetRequest request = new OrdersGetRequest(orderId);HttpResponse<Order> response = client(mode, clientId, clientSecret).execute(request);System.out.println("Status Code: " + response.statusCode());System.out.println("Status: " + response.result().status());System.out.println("Order id: " + response.result().id());if(response.result().purchaseUnits().get(0).payments() != null) {List<Capture> captures = response.result().purchaseUnits().get(0).payments().captures();if(captures != null) {for (Capture capture : captures) {if (capture.id() != null && capture.id().length() > 0) {f = true;}}}}} catch (Exception e2) {e2.printStackTrace();}}return f;}/*** 用户授权支付成功，进行扣款操作：* 用户通过CreateOrder生成 approveUrl 跳转paypal支付成功后，只是授权，并没有将用户的钱打入我们的paypal账户，我们需要通过 CaptureOrder接口，将钱打入我的PayPal账户* @param orderId 前端提供的palpay的订单id*/public void captureOrder(String orderId){OrdersCaptureRequest request = new OrdersCaptureRequest(orderId);request.requestBody(this.buildRequestBody());HttpResponse<Order> response = null;try {response = client(mode, clientId, clientSecret).execute(request);} catch (IOException e1) {try {log.error("第1次调用paypal扣款失败");response = client(mode, clientId, clientSecret).execute(request);} catch (Exception e) {try {log.error("第2次调用paypal扣款失败");response = client(mode, clientId, clientSecret).execute(request);} catch (Exception e2) {log.error("第3次调用paypal扣款失败，失败原因 {}", e2.getMessage() );}}}if (ObjectUtils.isNotEmpty(response)) {log.info("Status Code = {}, Status = {}, OrderID = {}", response.statusCode(), response.result().status(), response.result().id());for (LinkDescription link : response.result().links()) {log.info("Links-{}: {}    \tCall Type: {}", link.rel(), link.href(), link.method());}for (PurchaseUnit purchaseUnit : response.result().purchaseUnits()) {for (Capture capture : purchaseUnit.payments().captures()) {log.info("Capture id: {}", capture.id());log.info("status: {}", capture.status());log.info("invoice_id: {}", capture.invoiceId());if("COMPLETED".equals(capture.status())) {//进行数据库操作，修改订单状态为已支付成功，尽快发货（配合回调和CapturesGet查询确定成功）log.info("支付成功,状态为=COMPLETED");}if("PENDING".equals(capture.status())) {log.info("status_details: {}", capture.captureStatusDetails().reason());String reason = "PENDING";if(capture.captureStatusDetails() != null && capture.captureStatusDetails().reason() != null) {reason = capture.captureStatusDetails().reason();}//进行数据库操作，修改订单状态为已支付成功，但触发了人工审核，请审核通过后再发货（配合回调和CapturesGet查询确定成功）log.info("支付成功,状态为=PENDING : {}", reason);}}}Payer buyer = response.result().payer();log.info("Buyer Email Address: {}", buyer.email());log.info("Buyer Name: {} {}", buyer.name().givenName(), buyer.name().surname());}}/*** 查询订单详情* @param orderId 前端提供的palpay的订单id* @throws IOException*/public void ordersGetRequest(String orderId) throws IOException {OrdersGetRequest request = new OrdersGetRequest(orderId);HttpResponse<Order> response = null;try {response = client(mode, clientId, clientSecret).execute(request);} catch (Exception e) {try {System.out.println("调用paypal订单查询失败，链接异常1");response = client(mode, clientId, clientSecret).execute(request);} catch (Exception e2) {try {System.out.println("调用paypal订单查询失败，链接异常2");response = client(mode, clientId, clientSecret).execute(request);} catch (Exception e3) {System.out.println("调用paypal订单查询失败，链接异常3");System.out.println(e3.getMessage());}}}System.out.println("Status Code: " + response.statusCode());System.out.println("Status: " + response.result().status());System.out.println("Order id: " + response.result().id());if(response.result().purchaseUnits().get(0).payments() != null) {List<Capture> captures = response.result().purchaseUnits().get(0).payments().captures();if(captures != null) {for (Capture capture : captures) {System.out.println("\t订单编号= " + capture.invoiceId() + "\tCapture Id= " + capture.id() + "\tCapture status= " + capture.status() + "\tCapture amount= " + capture.amount().currencyCode() + ":" + capture.amount().value());}}List<Refund> refunds = response.result().purchaseUnits().get(0).payments().refunds();if(refunds != null) {for (Refund refund : refunds) {System.out.println("\t售后编号= " + refund.invoiceId() + "\tRefund Id= " + refund.id() + "\tRefund status= " + refund.status() + "\tRefund amount= " + refund.amount().currencyCode() + ":" + refund.amount().value());}}}System.out.println("Links: ");for (LinkDescription link : response.result().links()) {System.out.println("\t" + link.rel() + ": " + link.href() + "\tCall Type: " + link.method());}}/*** 查询扣款详情* @param orderId 前端提供的palpay的订单id* @throws IOException*/public void capturesGetRequest(String orderId) throws IOException {CapturesGetRequest request = new CapturesGetRequest(orderId);HttpResponse<com.paypal.payments.Capture> response = client(mode, clientId, clientSecret).execute(request);System.out.println("Status Code: " + response.statusCode());System.out.println("Status: " + response.result().status());System.out.println("Capture ids: " + response.result().id());System.out.println("Links: ");for (com.paypal.payments.LinkDescription link : response.result().links()) {System.out.println("\t" + link.rel() + ": " + link.href() + "\tCall Type: " + link.method());}}public Map<String,Object> createOrder(OrderRequest orderRequest) {OrdersCreateRequest request = new OrdersCreateRequest();request.header("prefer","return=representation");request.requestBody(orderRequest);
//        PayPalClient payPalClient = new PayPalClient();HttpResponse<Order> response = null;try {response = client(mode, clientId, clientSecret).execute(request);} catch (IOException e1) {try {log.error("第1次调用paypal订单创建失败");response = client(mode, clientId, clientSecret).execute(request);} catch (Exception e) {try {log.error("第2次调用paypal订单创建失败");response = client(mode, clientId, clientSecret).execute(request);} catch (Exception e2) {log.error("第3次调用paypal订单创建失败，失败原因：{}", e2.getMessage());}}}
//        String approve = "";Map<String,Object> map = new HashMap();if (response.statusCode() == 201) {log.info("Status Code = {}, Status = {}, OrderID = {}, Intent = {}", response.statusCode(), response.result().status(), response.result().id(), response.result().checkoutPaymentIntent());map.put("Id",response.result().id());for (LinkDescription link : response.result().links()) {log.info("Links-{}: {}    \tCall Type: {}", link.rel(), link.href(), link.method());if(link.rel().equals("approve")) {//                    approve = link.href();map.put("outOrderNo",link.href());}}String totalAmount = response.result().purchaseUnits().get(0).amountWithBreakdown().currencyCode() + ":" + response.result().purchaseUnits().get(0).amountWithBreakdown().value();log.info("Total Amount: {}", totalAmount);
//            String json= new JSONObject(new Json().serialize(response.result())).toString(4);
//            log.info("createOrder response body: {}", json);}return map;}//    public static void main(String[] args) throws Exception {//        PayPalUtils payPalUtils = new PayPalUtils();
//        payPalUtils.verifyOrderInfo("45S82276S8854414K");
//        payPalUtils.ordersGetRequest("45S82276S8854414K");
//        payPalUtils.captureOrder("18K07174PX6483500");
//        payPalUtils.capturesGetRequest("31V65486WC667442G");
//        // issue ： ORDER_ALREADY_CAPTURED 订单已被捕获
//        // intent=CAPTURE 每个订单只允许捕获一次
//    }
}

不敢说描述的有多么到位只希望给java将要对接paypal的同学一点儿参考

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