api - Java 中的 Paypal REST API - getAccessToken 返回 null

Question

我正在尝试设置 Paypal API。但是 getAccessToken() 方法返回 null。在查看 API 时，它提到使用 Payment.initConfig 或创建 OAuthTokenCredentials。 accessToken 的两种方式都返回为 null。

public static void createPayment() {
    String clientID = "xxxxxx"
    String clientSecret = "xxxxx";
    String paymentID = null;
    OAuthTokenCredential credentials;
    String accessToken;
    Properties prop = new Properties();

    try {
        prop.setProperty("service.Endpoint", "http://api.sandbox.paypal.com");
        prop.setProperty("clientID", clientID);
        prop.setProperty("clientSecret", clientSecret);

        prop.setProperty("http.GoogleAppEngine", "false");
        prop.setProperty("http.UseProxy", "false");

        prop.setProperty("http.ConnectionTimeOut", "5000");
        prop.setProperty("http.Retry", "1");
        prop.setProperty("http.ReadTimeOut", "30000");
        prop.setProperty("http.MaxConnection", "100");

        //tried this way. 
        credentials = Payment.initConfig(prop);

        //also tried this way.
        //accessToken = new OAuthTokenCredential(clientID, clientSecret).getAccessToken();

        accessToken = credentials.getAccessToken();
        Payment.get(accessToken, paymentID);
        APIContext apiContext = new APIContext(accessToken);
        Payment payment = new Payment();
        payment.setIntent("sale");
        payment.create(apiContext);            
    } catch (PayPalRESTException ex) {
        Logger.getLogger(PayPal.class.getName()).log(Level.SEVERE, null, ex);
    }

}

Answer 1

在调用“getAccessToken”之前，您必须配置端点:

    // Sandbox (for testing) : https://api.sandbox.paypal.com
    // Live (production) : https://api.paypal.com

    Properties properties = new Properties();
    properties.setProperty("service.EndPoint", "https://api.paypal.com");
    ConfigManager.getInstance().load(properties);

    OAuthTokenCredential tokenCredential = new OAuthTokenCredential(clientId, clientSecret);
    String accessToken = tokenCredential.getAccessToken();

更多信息请访问:PayPal-Java-SDK / GitHub