java后端PayPal支付实现教程

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_mbj0
    clientsecret: emdda7g_q7kmoih08qjfg-dab8d2thkytzrr
    #测试的mode
    mode: sandbox
    #正式的mode
    mode: live

/**
 * @author majun
 * @email [e-mail]
 * @date 2021/7/29
 * @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

    /**
     * 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")
    @deprecated
    public 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
 *
 * @author majun
 * @email [e-mail]
 * @date 2021/7/29
 * @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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