环境准备

1.注册paypal账户

PayPal官方

2.登录开发者中心

PayPal开发者中心

3.创建沙箱账户

Business为收款账号，Personal为付款账号，平台默认创建好了两个账号


这里显示的 账户和密码，支付的时候用

4.在沙箱模式创建一个app，平台默认创建好了一个

4.1填写信息

类型：

Merchant-仅为自己收款

Platform-作为平台收款，可分账给卖家

4.2绑定某个沙箱账号

4.3Client ID及Secret

进入app详细页面，查看Client ID及Secret（后续需填写到代码中）

支付代码

1.pom

 <dependency>
            <groupId>com.github.javen205</groupId>
            <artifactId>IJPay-All</artifactId>
            <version>2.9.3</version>
        </dependency>

2.实例化配置

public PayPalApiConfig getConfig() {
    PayPalApiConfig config = new PayPalApiConfig();
    config.setClientId(payPalBean.getClientId());
    config.setClientSecret(payPalBean.getSecret());
    config.setSandBox(payPalBean.getSandBox());
    config.setDomain(payPalBean.getDomain());
    PayPalApiConfigKit.setThreadLocalApiConfig(config);
    return config;
}

3.支付订单

 private final static String RETURN_URL = "/center/pay/order/successUrl";
    private final static String CANCEL_URL = "/center/pay/order/cancelUrl";
/**
     * @return void
     * @params []
     * @Author
     * @Date
     * @Description: 支付订单
     */

    public void index() {
        String id = get("id");
        if (StrKit.isBlank(id)) {
            //re("订单id未提供");
            return;
        }
        BusOrder target = BusOrder.dao.template("order.find", Kv.by("id", id)).findFirst();
        if (target == null) {
            //re("订单不存在");
            return;
        }
        String pay_method = target.getPayMethod();
        try {
            PayPalApiConfig config = getConfig();

            //参数请求参数文档 https://developer.paypal.com/docs/api/orders/v2/#orders_create
            Map<String, Object> dataMap = new HashMap<>();
            dataMap.put("intent", "CAPTURE");//不改


            ArrayList<Map<String, Object>> list = new ArrayList<>();
            Map<String, Object> amount = new HashMap<>();
            amount.put("currency_code", "USD");//美元
            double actualPrice = NumberUtil.mul(target.getActualPrice() + "", "1").doubleValue();
            amount.put("value", actualPrice);//实际付款


            Map<String, Object> itemMap = new HashMap<>();
            itemMap.put("amount", amount);
            list.add(itemMap);
            dataMap.put("purchase_units", list);

            Map<String, String> applicationContext = new HashMap<>();
            applicationContext.put("cancel_url", config.getDomain().concat(CANCEL_URL) + "?id=" + target.getId() + "&user=" + getHeader("userCode"));//失败跳转地址
            applicationContext.put("return_url", config.getDomain().concat(RETURN_URL));//成功后跳转地址
            applicationContext.put("brand_name", "test");//品牌名称
            //applicationContext.put("logo_url", "");//付款方式徽标的 URL
            dataMap.put("application_context", applicationContext);

            String data = JSONUtil.toJsonStr(dataMap);
            log.info(data);
            IJPayHttpResponse resData = PayPalApi.createOrder(config, data);
            log.info(resData.toString());
            if (resData.getStatus() == 201) {
                String resultStr = resData.getBody();
                cn.hutool.json.JSONObject jsonObject = JSONUtil.parseObj(resultStr);
                //System.out.println(jsonObject);
                target.setOrderThirdId(jsonObject.getStr("id"));
                target.update();

                JSONArray links = jsonObject.getJSONArray("links");
                for (int i = 0; i < links.size(); i++) {
                    JSONObject item = links.getJSONObject(i);
                    String rel = item.getStr("rel");
                    String href = item.getStr("href");
                    if ("approve".equalsIgnoreCase(rel)) {
                        // redirect(href);
                        rsPara("支付地址获取成功", Kv.by("href", href));//支付地址 提交给前端
                        return;
                    }
                }
            }
            re("支付失败");
            return;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
  

3.1用sandbox的personal的账号登录，并支付

4.支付成功&失败

 //支付成功
    public void successUrl() {
        getPageStore("orderResult");
        String token = get("token");
        String payerId = get("PayerID");
        BusOrder target = BusOrder.dao.template("order.find", Kv.by("order_third_id", token)).findFirst();
        //确认付款
        log.info("token:" + token);
        log.info("payerId:" + payerId);
        PayPalApiConfig config = getConfig();
        IJPayHttpResponse response = PayPalApi.captureOrder(config, token, "");
        com.alibaba.fastjson.JSONObject jsonObject = com.alibaba.fastjson.JSONObject.parseObject(response.getBody());
        if (response.getStatus() == 201 && jsonObject.getString("status").equals("COMPLETED")) {
            target.setPayTime(DateUtil.now());
            target.setCallbackJson(response.getBody());
            target.setState("2");
            target.update();
                rs("支付成功，跳转页面");
                redirect(config.getDomain() + "/center/order/getOrders");
               return;
        }

        setAttr("status", response.getStatus());
        render("/order/result.html");
    }

    //未支付 返回
    public void cancelUrl() {
        //String readData = HttpKit.readData(getRequest());
       /* System.out.println(readData);
        rs(readData);*/
        // PayPalApiConfig config = getConfig();
        String userCode = get("user");
        BusUser log_user = Redis.use().get(RedisHeader.USER_LOGIN_CODE + userCode);
        if (log_user == null) {
            //re("");
            render("/");
            return;
        }
        String id = get("id");
        BusOrder target = BusOrder.dao.template("order.find", Kv.by("id", id)).findFirst();
        /*String token = get("token");
        BusOrder target = BusOrder.dao.template("order.find", Kv.by("order_third_id", token)).findFirst();*/
        setAttr("orderObj", target);
        getPageStore("orderDetail");
        render("/order/order_detail.html");
    }

5.退款

/**
     * @return void
     * @params []
     * @Author
     * @Date
     * @Description: 退款订单
     */
    public void refund() {
        com.alibaba.fastjson.JSONObject obj = getAttr("obj");
        String id = obj.getString("id");
        String refund_note = obj.getString("refund_note");

        BusOrder target = BusOrder.dao.template("order.find", Kv.by("id", id)).findFirst();
        if (target == null) {
            re("订单不存在");
            return;
        }
        try {
            com.alibaba.fastjson.JSONObject callbackJson = com.alibaba.fastjson.JSONObject.parseObject(target.getCallbackJson());//支付的时候给的json
            String captureId = callbackJson.getJSONArray("purchase_units").getJSONObject(0).getJSONObject("payments")
                    .getJSONArray("captures").getJSONObject(0).getString("id");

            PayPalApiConfig config = getConfig();
            Map<String, Object> map = new HashMap<>();
            String invoice_id = PayKit.generateStr();
            map.put("invoice_id", invoice_id);//退款编号
            map.put("note_to_payer", refund_note);//退款原因

            Map<String, String> amount = new HashMap<>();
            double v = NumberUtil.mul(target.getActualPrice() + "", "1").doubleValue();
            amount.put("value", v + "");
            amount.put("currency_code", "USD");

            map.put("amount", amount);

            String data = JSONUtil.toJsonStr(map);
            log.info("refund data：" + data);
            IJPayHttpResponse response = PayPalApi.refund(config, captureId, data);
            log.info(response.toString());
            if (response.getStatus() == 201) {
                target.setRefundTime(DateUtil.now());
                target.setState("5");
                target.setRefundNote(refund_note);
                target.setRefundInvoice(invoice_id);
                target.update();
                rs("Refund success");
                //redirect(config.getDomain() + "/center/order/getOrders");
                return;
            } else {
                re("Refund failure ");
            }
            return;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }