PayPal 自适应付款身份验证失败，输入是名称值对。在java中答案

【问题标题】：PayPal Adaptive Payments Authentication failed, Inputs are Name value pair. In javaPayPal 自适应付款身份验证失败，输入是名称值对。在java中
【发布时间】：2025-12-25 15:40:12
【问题描述】：

我从 paypal 沙箱收到身份验证失败，我将请求作为名称值对发送到 pay pal..

代码如下：`

final String PayPalConstants.ENCODE_TYPE="UTF-8";
final StringBuffer encodedStringBuffer = new StringBuffer();
encodedStringBuffer.append("X-PAYPAL-SECURITY-USERID=" + URLEncoder.encode(getAdaptivePaymentUserName(), PayPalConstants.ENCODE_TYPE) + "&");
    encodedStringBuffer.append("X-PAYPAL-SECURITY-PASSWORD=" + URLEncoder.encode(getAdaptivePaymentPassword(), PayPalConstants.ENCODE_TYPE) + "&");
    if (!isUseCert()) {
        encodedStringBuffer.append("X-PAYPAL-SECURITY-SIGNATURE=" + URLEncoder.encode(getAdaptivePaymentSignature(), PayPalConstants.ENCODE_TYPE) + "&");
    }
    // encodedStringBuffer.append("BUTTONSOURCE=" +
    // URLEncoder.encode(PayPalConstants.BUTTONSOURCE,
    // PayPalConstants.ENCODE_TYPE) + "&");
    encodedStringBuffer.append("X-PAYPAL-REQUEST-DATA-FORMAT=" + URLEncoder.encode("NV", PayPalConstants.ENCODE_TYPE) + "&");
    encodedStringBuffer.append("X-PAYPAL-RESPONSE-DATA-FORMAT=" + URLEncoder.encode("NV", PayPalConstants.ENCODE_TYPE) + "&");
    encodedStringBuffer.append("X-PAYPAL-APPLICATION-ID=" + URLEncoder.encode(getAdaptivePaymentAppId(), PayPalConstants.ENCODE_TYPE) + "&");

                final PostMethod httpPost = new PostMethod(this.adaptivePaymentRestURL.getPath());

    httpPost.setRequestEntity(new StringRequestEntity(encodedStringBuffer.toString(), "text/html", PayPalConstants.ENCODE_TYPE));
final int result = this.adaptivePaymentHttpClient.executeMethod(httpPost);
                    if (result == 200) {
            response = httpPost.getResponseBodyAsString();
}

响应值如下：

<?xml version='1.0' encoding='UTF-8'?>
<ns3:FaultMessage xmlns:ns3="http://svcs.paypal.com/types/common" xmlns:ns2="http://svcs.paypal.com/types/ap">
<responseEnvelope>
<timestamp>2013-08-21T00:20:51.291-07:00</timestamp>
<ack>Failure</ack>
<correlationId>e3325********</correlationId>
<build>694****</build>
</responseEnvelope>
<error>
**<errorId>520003</errorId>**
<domain>PLATFORM</domain>
<subdomain>Application</subdomain>
<severity>Error</severity>
<category>Application</category>
<message>Authentication failed. API credentials are incorrect.</message>
</error>
</ns3:FaultMessage>

所以谁能告诉我我做错了什么？输入字符串缓冲区是否是此 Web 服务的错误数据类型。请帮帮我..我对此完全感到困惑。

提前致谢。

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标签： java paypal paypal-sandbox paypal-adaptive-payments