我正在尝试在 Paypal DoDirectPayment 方法中开发应用程序正在创建测试沙箱帐户并将以下代码与我自己的 API 凭据一起使用，但我得到确认是失败...
如果有人知道如何解决这个问题，请分享给我。，
提前致谢。
public class DoDirectPayment
{
private NVPCallerServices caller = null;
public String DoDirectPaymentCode(String paymentAction,String amount,String cardType,
String acct,String expdate,String cvv2, String firstName,
String lastName, String street, String city, String state,
String zip, String countryCode)
{
NVPEncoder encoder = new NVPEncoder();
NVPDecoder decoder = new NVPDecoder();
try
{
caller = new NVPCallerServices();
APIProfile profile = ProfileFactory.createSignatureAPIProfile();
/*
WARNING: Do not embed plaintext credentials in your application code.
Doing so is insecure and against best practices.
Your API credentials must be handled securely. Please consider
encrypting them for use in any production environment, and ensure
that only authorized individuals may view or modify them.
*/
// Set up your API credentials, PayPal end point, API operation and version.
profile.setAPIUsername("sdk-three_api1.sdk.com");
profile.setAPIPassword("QFZCWN5HZM8VBG7Q");
profile.setSignature("AVGidzoSQiGWu.lGj3z15HLczXaaAcK6imHawrjefqgclVwBe8imgCHZ");
profile.setEnvironment("sandbox");
profile.setSubject("");
caller.setAPIProfile(profile);
encoder.add("VERSION", "51.0");
encoder.add("METHOD","DoDirectPayment");
// Add request-specific fields to the request string.
encoder.add("PAYMENTACTION",paymentAction);
encoder.add("AMT",amount);
encoder.add("CREDITCARDTYPE",cardType);
encoder.add("ACCT",acct);
encoder.add("EXPDATE",expdate);
encoder.add("CVV2",cvv2);
encoder.add("FIRSTNAME",firstName);
encoder.add("LASTNAME",lastName);
encoder.add("STREET",street);
encoder.add("CITY",city);
encoder.add("STATE",state);
encoder.add("ZIP",zip);
encoder.add("COUNTRYCODE",countryCode);
// Execute the API operation and obtain the response.
String NVPRequest = encoder.encode();
String NVPResponse =(String) caller.call(NVPRequest);
decoder.decode(NVPResponse);
} catch(Exception ex)
{
ex.printStackTrace();
}
return decoder.get("ACK");
}
public static void main(String[] args) {
DoDirectPayment obj=new DoDirectPayment();
System.out.println(obj.DoDirectPaymentCode("Authorization ", "1", "Visa", "1234123412341234", "122012", "123", "testname", "testname", "chennai", "chennai", "TX", "77570", "US"));
}
}