java处理paypal支付

paypal流程有如下几步

1创建应用程序

2启用与palPal的连接

3应用评论

4构建按钮

5获取授权码

6获取访问令牌

7为access_token交换refresh_token

8获取客户信息

9测试集成

10上线

这里主要讲java验证 palpal支付，也就是5-9的步骤。

java验证paypal支付主要分为以下几步；

第一步，获取权限认证的token.

第二步，获取前端支付成功后返回的paymentId。并且拿去paypal查询订单信息。

第三步对订单信息进行校验。

1获取权限认证的token.

private static String getAccessToken() {try {URL url = new URL(TOKEN_URL);String authorization = clientId + ":" + secret;authorization = Base64.encodeBase64String(authorization.getBytes());HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("POST");// 提交模式// 设置请求头headerconn.setRequestProperty("Accept", "application/json");conn.setRequestProperty("Accept-Language", "en_US");conn.setRequestProperty("Authorization", "Basic " + authorization);// conn.setConnectTimeout(10000);//连接超时 单位毫秒// conn.setReadTimeout(2000);//读取超时 单位毫秒conn.setDoOutput(true);// 是否输入参数String params = "grant_type=client_credentials";conn.getOutputStream().write(params.getBytes());// 输入参数InputStreamReader inStream = new InputStreamReader(conn.getInputStream());BufferedReader reader = new BufferedReader(inStream);StringBuilder result = new StringBuilder();String lineTxt = null;while ((lineTxt = reader.readLine()) != null) {result.append(lineTxt);}reader.close();System.out.println("getAccessToken:" + result);PayPalToken palToken = JSONObject.parseObject(result.toString(), PayPalToken.class);return palToken.getAccess_token();} catch (Exception err) {err.printStackTrace();}return null;}

2获取前端支付成功后返回的paymentId。并且拿去paypal查询订单信息。

public String getPaymentDetails(String paymentId) {try {URL url = new URL(PAYMENT_DETAIL_TEST + paymentId);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("GET");// 提交模式// 设置请求头headerconn.setRequestProperty("Accept", "application/json");conn.setRequestProperty("Authorization", "Bearer " + getAccessToken());// conn.setConnectTimeout(10000);//连接超时 单位毫秒// conn.setReadTimeout(2000);//读取超时 单位毫秒InputStreamReader inStream = new InputStreamReader(conn.getInputStream());BufferedReader reader = new BufferedReader(inStream);StringBuilder result = new StringBuilder();String lineTxt = null;while ((lineTxt = reader.readLine()) != null) {result.append(lineTxt);}reader.close();return result.toString();} catch (Exception err) {err.printStackTrace();}return null;}

返回后的消息如下

{"id": "PAYID-LV262LY1GF17006GU287063F","intent": "sale","state": "approved","cart": "6G500886VN698753Y","payer": {"payment_method": "paypal","status": "VERIFIED","payer_info": {"email": "zerotest@gmail.com","first_name": "zero","last_name": "zero","payer_id": "RHDCTBPXH3LKG","shipping_address": {"recipient_name": "zero zero"},"phone": "4083363521","country_code": "US"}},"transactions": [{"amount": {"total": "0.02","currency": "USD","details": {"subtotal": "0.02","shipping": "0.00","insurance": "0.00","handling_fee": "0.00","shipping_discount": "0.00"}},"payee": {"merchant_id": "YJFGW6CVTV9XS","email": "leihuaping-facilitator@zerophil.com"},"description": "100粉钻","item_list": {"shipping_address": {"recipient_name": "zero zero"}},"related_resources": [{"sale": {"id": "7N444941X3531852Y","state": "completed","amount": {"total": "0.02","currency": "USD","details": {"subtotal": "0.02","shipping": "0.00","insurance": "0.00","handling_fee": "0.00","shipping_discount": "0.00"}},"payment_mode": "INSTANT_TRANSFER","protection_eligibility": "ELIGIBLE","protection_eligibility_type": "ITEM_NOT_RECEIVED_ELIGIBLE,UNAUTHORIZED_PAYMENT_ELIGIBLE","transaction_fee": {"value": "0.02","currency": "USD"},"parent_payment": "PAYID-LV262LY1GF17006GU287063F","create_time": "2019-09-09T06:12:20Z","update_time": "2019-09-09T06:12:20Z","links": [{"href": "https://api.sandbox.paypal.com/v1/payments/sale/7N444941X3531852Y","rel": "self","method": "GET"}, {"href": "https://api.sandbox.paypal.com/v1/payments/sale/7N444941X3531852Y/refund","rel": "refund","method": "POST"}, {"href": "https://api.sandbox.paypal.com/v1/payments/payment/PAYID-LV262LY1GF17006GU287063F","rel": "parent_payment","method": "GET"}]}}]}],"create_time": "2019-09-09T06:11:59Z","update_time": "2019-09-09T06:12:20Z","links": [{"href": "https://api.sandbox.paypal.com/v1/payments/payment/PAYID-LV262LY1GF17006GU287063F","rel": "self","method": "GET"}]
}

这里最简单的就是对state进行校验。state显示approved为成功。然后再跟进自己的业务对数据进行校验，一个简单的java版本支付校验就完成了。

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java处理paypal支付

1获取权限认证的token.

2获取前端支付成功后返回的paymentId。并且拿去paypal查询订单信息。

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